Pub Date : 2026-05-01Epub Date: 2026-02-05DOI: 10.1016/j.nuclphysa.2026.123352
Nguyen Gia Huy, Do Huy Tho, Mai Doan Quang Huy, Nguyen Le Anh
The α decay provides valuable constraints on nuclear structure and plays an essential role in identifying heavy and superheavy nuclei. We study α-decay half-lives of 178 even-even nuclei within a semi-classical WKB framework using a phenomenological Woods-Saxon α-nucleus potential. The potential depth is determined by imposing the Bohr-Sommerfeld quantization condition (BSQC), ensuring a physically consistent description of the quasibound α-daughter system. To facilitate large-scale calculations, a global parametrization of the BSQC-constrained potential depth is constructed. The resulting half-lives reproduce experimental data with comparable accuracy for both the direct BSQC approach and the fitted prescription, providing a first step toward a global and computationally efficient description of α decay.
{"title":"A global potential constrained by the Bohr-Sommerfeld quantization condition for α-decay half-lives of even-even nuclei","authors":"Nguyen Gia Huy, Do Huy Tho, Mai Doan Quang Huy, Nguyen Le Anh","doi":"10.1016/j.nuclphysa.2026.123352","DOIUrl":"10.1016/j.nuclphysa.2026.123352","url":null,"abstract":"<div><div>The <em>α</em> decay provides valuable constraints on nuclear structure and plays an essential role in identifying heavy and superheavy nuclei. We study <em>α</em>-decay half-lives of 178 even-even nuclei within a semi-classical WKB framework using a phenomenological Woods-Saxon <em>α</em>-nucleus potential. The potential depth is determined by imposing the Bohr-Sommerfeld quantization condition (BSQC), ensuring a physically consistent description of the quasibound <em>α</em>-daughter system. To facilitate large-scale calculations, a global parametrization of the BSQC-constrained potential depth is constructed. The resulting half-lives reproduce experimental data with comparable accuracy for both the direct BSQC approach and the fitted prescription, providing a first step toward a global and computationally efficient description of <em>α</em> decay.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1069 ","pages":"Article 123352"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-02-03DOI: 10.1016/j.nuclphysa.2026.123350
Pankaj Kumar
In this study, a systematic investigation of deformed bubble/semibubble structures is performed for even-even light mass nuclei that also exhibit shape coexistence. The analysis is conducted using the relativistic mean field (RMF) model with non-linear meson-exchange (NL-ME) couplings. Ground-state properties are first calculated for even-even isotopes of Ne, Mg, Si and S from which nuclei exhibiting shape coexistence are identified. For these nuclei, proton density distributions are examined under both spherical and deformed configurations. The results indicate that nuclear deformation suppresses the bubble structure, with oblate deformation causing a greater depletion of central proton density than prolate deformation. Shape coexistence smooth out the nuclear density profile and effectively quench the bubble structure. Nevertheless, most of the studied nuclei exhibit bubble structures in both types of deformation. Based on these findings, several candidates displaying both shape coexistence and bubble structures are predicted. Additionally, the proton single-particle energy spectra of 38Si is analyzed for oblate and prolate shapes. The occupation of the 2s orbital is found to increase the central proton density on the prolate side. Whereas, on the oblate side, the mixing of and states contribute towards the central proton densities, thereby reducing the prominence of the bubble structure. This study also highlights the sensitivity of bubble structure to strong pairing correlations and deformation effects.
{"title":"Deformed proton bubble/semibubble structure and shape coexistence in light nuclei","authors":"Pankaj Kumar","doi":"10.1016/j.nuclphysa.2026.123350","DOIUrl":"10.1016/j.nuclphysa.2026.123350","url":null,"abstract":"<div><div>In this study, a systematic investigation of deformed bubble/semibubble structures is performed for even-even light mass nuclei that also exhibit shape coexistence. The analysis is conducted using the relativistic mean field (RMF) model with non-linear meson-exchange (NL-ME) couplings. Ground-state properties are first calculated for even-even isotopes of Ne, Mg, Si and S from which nuclei exhibiting shape coexistence are identified. For these nuclei, proton density distributions are examined under both spherical and deformed configurations. The results indicate that nuclear deformation suppresses the bubble structure, with oblate deformation causing a greater depletion of central proton density than prolate deformation. Shape coexistence smooth out the nuclear density profile and effectively quench the bubble structure. Nevertheless, most of the studied nuclei exhibit bubble structures in both types of deformation. Based on these findings, several candidates displaying both shape coexistence and bubble structures are predicted. Additionally, the proton single-particle energy spectra of <sup>38</sup>Si is analyzed for oblate and prolate shapes. The occupation of the 2<em>s</em> orbital is found to increase the central proton density on the prolate side. Whereas, on the oblate side, the mixing of <span><math><mrow><mi>s</mi><mo>(</mo><mi>l</mi><mo>=</mo><mn>0</mn><mo>)</mo></mrow></math></span> and <span><math><mrow><mi>d</mi><mo>(</mo><mi>l</mi><mo>=</mo><mn>2</mn><mo>)</mo></mrow></math></span> states contribute towards the central proton densities, thereby reducing the prominence of the bubble structure. This study also highlights the sensitivity of bubble structure to strong pairing correlations and deformation effects.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1069 ","pages":"Article 123350"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146193026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-02-06DOI: 10.1016/j.nuclphysa.2026.123357
Asgar Hosseinnezhad, Hadi Sabri
This work presents a combined statistical and algebraic analysis of electric quadrupole transition probabilities B(E2) in nuclei exhibiting shape coexistence (SC). Experimental B(E2) values for selected intra-band and inter-band transitions are examined using random matrix theory (RMT), where the unfolding procedure and the Porter–Thomas distribution are employed to quantify the degree of correlation among transition strengths. The extracted correlation parameter and the variance of the unfolded B(E2) distributions are interpreted in connection with configuration mixing, providing statistical signatures of coexisting spherical, γ-soft, and deformed structures. To complement the experimental analysis, theoretical B(E2) values are calculated within the Interacting Boson Model (IBM-1). A detailed derivation of the reduced matrix elements of the quadrupole operator in the U(5), O(6), and SU(3) dynamical symmetry limits is provided, including the explicit angular-momentum dependence of B(E2; Ji → Jf). The symmetry character of each nucleus and the structure of the excited bands (ground, γ, and β bands) are specified, and the IBM parameters are determined through a least-squares fit to low-lying energy levels. A comparison between experimental and theoretical B(E2) distributions reveals that nuclei located in known SC regions—particularly the Cd isotopic chain—exhibit a systematic reduction in the variance of ground-band transition strengths, consistent with enhanced configuration mixing. These results demonstrate that statistical properties of B(E2) values, when combined with IBM symmetry analysis, provide a sensitive complementary tool for identifying and characterizing shape coexistence in atomic nuclei.
{"title":"Statistical analysis of quadrupole transitions in shape-coexisting nuclei: Bridging theory and experiment","authors":"Asgar Hosseinnezhad, Hadi Sabri","doi":"10.1016/j.nuclphysa.2026.123357","DOIUrl":"10.1016/j.nuclphysa.2026.123357","url":null,"abstract":"<div><div>This work presents a combined statistical and algebraic analysis of electric quadrupole transition probabilities B(E2) in nuclei exhibiting shape coexistence (SC). Experimental B(E2) values for selected intra-band and inter-band transitions are examined using random matrix theory (RMT), where the unfolding procedure and the Porter–Thomas distribution are employed to quantify the degree of correlation among transition strengths. The extracted correlation parameter and the variance of the unfolded B(E2) distributions are interpreted in connection with configuration mixing, providing statistical signatures of coexisting spherical, γ-soft, and deformed structures. To complement the experimental analysis, theoretical B(E2) values are calculated within the Interacting Boson Model (IBM-1). A detailed derivation of the reduced matrix elements of the quadrupole operator in the U(5), O(6), and SU(3) dynamical symmetry limits is provided, including the explicit angular-momentum dependence of B(E2; <em>J<sub>i</sub></em> → <em>J<sub>f</sub></em>). The symmetry character of each nucleus and the structure of the excited bands (ground, γ, and β bands) are specified, and the IBM parameters are determined through a least-squares fit to low-lying energy levels. A comparison between experimental and theoretical B(E2) distributions reveals that nuclei located in known SC regions—particularly the Cd isotopic chain—exhibit a systematic reduction in the variance of ground-band transition strengths, consistent with enhanced configuration mixing. These results demonstrate that statistical properties of B(E2) values, when combined with IBM symmetry analysis, provide a sensitive complementary tool for identifying and characterizing shape coexistence in atomic nuclei.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1069 ","pages":"Article 123357"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146193027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-02-05DOI: 10.1016/j.nuclphysa.2026.123353
F.E. Rodríguez Barrera, N.G. Kelkar
The determination of nuclear charge radii is crucial for understanding the internal structure of nuclei and their fundamental interactions. A persistent discrepancy, not only in the measured proton charge radius but also in the light nucleus charge radius, between electron scattering and muonic spectroscopy has fueled ongoing debates in nuclear and particle physics. Using this discrepancy, we revisit the role of one of the proposed solutions, namely the use of Lorentz-boosted nuclear form factors to find a subtle connection between the boost and the cluster structure of nuclei. By applying two distinct relativistic formalisms, namely the Licht-Pagnamenta and Mitra-Kumari approaches, we systematically analyze corrections to the moments of the density distributions in hadrons and nuclei. Our results demonstrate that boosting the form factors from the Breit to the rest frame of the nucleus not only assists in reconciling the spectroscopic and scattering measurements but also provides a method to infer on the quark and nucleon cluster configurations within nuclei.
{"title":"Clustering in hadrons and light nuclei from Lorentz boosted form factors","authors":"F.E. Rodríguez Barrera, N.G. Kelkar","doi":"10.1016/j.nuclphysa.2026.123353","DOIUrl":"10.1016/j.nuclphysa.2026.123353","url":null,"abstract":"<div><div>The determination of nuclear charge radii is crucial for understanding the internal structure of nuclei and their fundamental interactions. A persistent discrepancy, not only in the measured proton charge radius but also in the light nucleus charge radius, between electron scattering and muonic spectroscopy has fueled ongoing debates in nuclear and particle physics. Using this discrepancy, we revisit the role of one of the proposed solutions, namely the use of Lorentz-boosted nuclear form factors to find a subtle connection between the boost and the cluster structure of nuclei. By applying two distinct relativistic formalisms, namely the Licht-Pagnamenta and Mitra-Kumari approaches, we systematically analyze corrections to the moments of the density distributions in hadrons and nuclei. Our results demonstrate that boosting the form factors from the Breit to the rest frame of the nucleus not only assists in reconciling the spectroscopic and scattering measurements but also provides a method to infer on the quark and nucleon cluster configurations within nuclei.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1069 ","pages":"Article 123353"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146193028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-02-13DOI: 10.1016/j.nuclphysa.2026.123355
Gobind Ram , Abhishek Yadav , Manoj Kumar Sharma , Md Moin Shaikh , A. Jhingan , M. Kumar , N. Saneesh , Indu Bala , K.S. Golda , R. Dubey , G. Kaur , T. Banerjee , B.P. Singh
A comprehensive study on the coupling strength was conducted using the barrier distribution derived from fusion and quasi-elastic measurements. A brief overview of the extraction of the quasi-elastic scattering barrier distribution is provided by presenting quasi-elastic measurements conducted for the 16O+165Ho system. A model-independent technique was used to examine data from various systems published in the literature to relate the different observables obtained from the barrier distribution. The systematic analysis shows the collective behavior of the interacting ions and correlates the structure with the barrier distribution. A comparison of the experimentally determined cumulative coupling strengths for various systems (different projectiles on the same target) revealed that, in addition to the Coulomb factor ZPZT is significant. The barrier distribution proved to be a suitable tool for investigating the structural characteristics of interacting ions.
{"title":"A systematic study of coupling effects in heavy ion reactions","authors":"Gobind Ram , Abhishek Yadav , Manoj Kumar Sharma , Md Moin Shaikh , A. Jhingan , M. Kumar , N. Saneesh , Indu Bala , K.S. Golda , R. Dubey , G. Kaur , T. Banerjee , B.P. Singh","doi":"10.1016/j.nuclphysa.2026.123355","DOIUrl":"10.1016/j.nuclphysa.2026.123355","url":null,"abstract":"<div><div>A comprehensive study on the coupling strength was conducted using the barrier distribution derived from fusion and quasi-elastic measurements. A brief overview of the extraction of the quasi-elastic scattering barrier distribution is provided by presenting quasi-elastic measurements conducted for the <sup>16</sup>O+<sup>165</sup>Ho system. A model-independent technique was used to examine data from various systems published in the literature to relate the different observables obtained from the barrier distribution. The systematic analysis shows the collective behavior of the interacting ions and correlates the structure with the barrier distribution. A comparison of the experimentally determined cumulative coupling strengths for various systems (different projectiles on the same target) revealed that, in addition to the Coulomb factor Z<sub><em>P</em></sub>Z<sub><em>T</em></sub> is significant. The barrier distribution proved to be a suitable tool for investigating the structural characteristics of interacting ions.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1069 ","pages":"Article 123355"},"PeriodicalIF":2.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The experiments for measuring the cross sections of 35 fission-like residues (with mass numbers 74 ≤ A ≤ 111) and 10 fusion-like residues have been carried out at energies ≈ 72.7 MeV, 80.3 MeV and 88.0 MeV. In this measurement, the recoil catcher technique followed by an off-beam activation γ-ray spectroscopy is used. The analysis of fusion cross-section data with code PACE4 reveals the contribution of complete and incomplete fusion processes in 14N +175Lu reactions. Fission fragments produced as a result of fusion of 14N projectile with 175Lu target have also been confirmed by comparing the values of post-fission observables viz., mass (σA) and charge (σZ) dispersions (deduced from the isotopic mass and isobaric yield distributions) with literature data. In addition to this, the statistical scission-point model based theoretical calculations performed (as per the prescription of Gubbi et. al., [31]) for determining the charge dispersion (σZ) of Br and Kr isotopes validate the experimental values of σZ obtained from the isobaric yield distribution. Thus, the consistency between theoretical and experimental values of charge dispersion (σZ) indicates the production of fission fragments from a equilibrated compound nucleus 189Pt* in 14N +175Lu reactions. In the present work, an alternative method is used for converting isotopic mass distribution into isobaric yield distribution. Furthermore, the experimental finding of mass variance () of fission fragments also complements the investigations of mass (σA) and charge (σZ) dispersions, as width of mass distribution (i.e., mass variance, ) of fission fragments is found to be exponentially function of excitation energy, hence, temperature of equilibrated compound nucleus.
实验测量了35个质量数为74 ≤ A ≤ 111的类裂变残基和10个能量为 ≈ 72.7 MeV、80.3 MeV和88.0 MeV的类聚变残基的截面。在这个测量中，后坐力捕捉技术随后的离束激活γ射线光谱被使用。用PACE4代码对核聚变截面数据进行分析，揭示了完全核聚变和不完全核聚变对14N +175Lu反应的贡献。通过将裂变后的质量（σA）和电荷（σZ）色散值（由同位素质量和等压产率分布推导而来）与文献数据进行比较，证实了14N弹丸与175Lu靶融合产生的裂变碎片。此外，基于统计断裂点模型的理论计算（按照Gubbi et al.，[31]的规定）确定了Br和Kr同位素的电荷色散（σZ），验证了从等压产率分布中得到的σZ的实验值。因此，电荷色散（σZ）的理论值与实验值的一致性表明，在14N +175Lu反应中，平衡复合核189Pt*产生了裂变碎片。在本工作中，采用了另一种方法将同位素质量分布转化为等压产率分布。此外，裂变碎片的质量方差（σM2）的实验发现也补充了质量（σA）和电荷（σZ）色散的研究，发现裂变碎片的质量分布宽度（即质量方差，σM2）是激发能的指数函数，因此，平衡复合核的温度。
{"title":"A comprehensive activation analysis of fusion-fission cross-sections for 14N +175Lu system","authors":"Satyendra Kumar Gautam , Manoj Kumar Sharma , Sushant Arora , Mamta Sarswat , Aquib Siddique , M. Shariq Asnain , Mohd. Shuaib , Ishfaq Majeed , Abhishek Yadav , Puspendra P. Singh , B.P. Singh , R. Prasad","doi":"10.1016/j.nuclphysa.2026.123341","DOIUrl":"10.1016/j.nuclphysa.2026.123341","url":null,"abstract":"<div><div>The experiments for measuring the cross sections of 35 fission-like residues (with mass numbers 74 ≤ A ≤ 111) and 10 fusion-like residues have been carried out at energies ≈ 72.7 MeV, 80.3 MeV and 88.0 MeV. In this measurement, the recoil catcher technique followed by an off-beam activation <em>γ</em>-ray spectroscopy is used. The analysis of fusion cross-section data with code PACE4 reveals the contribution of complete and incomplete fusion processes in <sup>14</sup>N +<sup>175</sup>Lu reactions. Fission fragments produced as a result of fusion of <sup>14</sup>N projectile with <sup>175</sup>Lu target have also been confirmed by comparing the values of post-fission observables viz., mass (<em>σ<sub>A</sub></em>) and charge (<em>σ<sub>Z</sub></em>) dispersions (deduced from the isotopic mass and isobaric yield distributions) with literature data. In addition to this, the statistical scission-point model based theoretical calculations performed (as per the prescription of Gubbi et. al., [31]) for determining the charge dispersion (<em>σ<sub>Z</sub></em>) of Br and Kr isotopes validate the experimental values of <em>σ<sub>Z</sub></em> obtained from the isobaric yield distribution. Thus, the consistency between theoretical and experimental values of charge dispersion (<em>σ<sub>Z</sub></em>) indicates the production of fission fragments from a equilibrated compound nucleus <sup>189</sup><em>Pt</em>* in <sup>14</sup>N +<sup>175</sup>Lu reactions. In the present work, an alternative method is used for converting isotopic mass distribution into isobaric yield distribution. Furthermore, the experimental finding of mass variance (<span><math><msubsup><mi>σ</mi><mi>M</mi><mn>2</mn></msubsup></math></span>) of fission fragments also complements the investigations of mass (<em>σ<sub>A</sub></em>) and charge (<em>σ<sub>Z</sub></em>) dispersions, as width of mass distribution (i.e., mass variance, <span><math><msubsup><mi>σ</mi><mi>M</mi><mn>2</mn></msubsup></math></span>) of fission fragments is found to be exponentially function of excitation energy, hence, temperature of equilibrated compound nucleus.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1068 ","pages":"Article 123341"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-12DOI: 10.1016/j.nuclphysa.2026.123329
Xuan Liu , Sheng Lin , Xun Chen
The strength of the interaction between heavy quarks is studied for heavy quarkonium () and doubly heavy baryons (QQq) at finite temperature and rapidity using the gauge/gravity duality in this paper. We show that this theoretical framework is capable of simultaneously and accurately describing both and QQq by fitting lattice potentials. In this framework, we study their interaction at long distances or low temperature and rapidity through effective string tension, while the interaction at short distances or high temperature and rapidity is studied through effective running coupling. Additionally, we plot their state diagram in the plane and systematically calculate their respective screening distances.
{"title":"The interaction of moving QQ¯ and QQq in the thermal plasma","authors":"Xuan Liu , Sheng Lin , Xun Chen","doi":"10.1016/j.nuclphysa.2026.123329","DOIUrl":"10.1016/j.nuclphysa.2026.123329","url":null,"abstract":"<div><div>The strength of the interaction between heavy quarks is studied for heavy quarkonium (<span><math><mrow><mi>Q</mi><mover><mi>Q</mi><mo>¯</mo></mover></mrow></math></span>) and doubly heavy baryons (QQq) at finite temperature and rapidity using the gauge/gravity duality in this paper. We show that this theoretical framework is capable of simultaneously and accurately describing both <span><math><mrow><mi>Q</mi><mover><mi>Q</mi><mo>¯</mo></mover></mrow></math></span> and QQq by fitting lattice potentials. In this framework, we study their interaction at long distances or low temperature and rapidity through effective string tension, while the interaction at short distances or high temperature and rapidity is studied through effective running coupling. Additionally, we plot their state diagram in the <span><math><mrow><mi>T</mi><mo>−</mo><mi>η</mi></mrow></math></span> plane and systematically calculate their respective screening distances.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1068 ","pages":"Article 123329"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145993588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-08DOI: 10.1016/j.nuclphysa.2026.123325
S. Rajput , D. Singh , A.G. Dimri , M. Das
The study was designed to investigate the different doses of gamma radiation (2.5, 5, 7.5 and 10 kGy) on the microbial load and physicochemical stability of branded and non- branded chilli and coriander powder over a 150 day storage period at room temperature (27 ± 2 °C) and compared with the control sample (unirradiated). Several bacterial species, Bacillus cereus, Salmonella sp. and Sulphite reducing Clostridia were identified in unirradiated spice samples. Results also indicated that gamma radiation processing dose is inversely proportion to the reduction of total microbial population in both the spice samples. Dose of 7.5 kGy for non-branded chilli and coriander powder and 5 kGy for branded showed significant (p < 0.05) removal of microbial load in the studied spices. Insignificant differences were noted in the physico chemical properties including moisture, pH, total ash, acid insoluble ash and crude fibre of spices after 150 days of storage. Acceptability of the irradiated product was assessed by induced radioactivity. These findings suggest that gamma radiation dose of 7.5 kGy for both spice samples had an excellent response for inactivation of naturally occurring microbial flora with insignificant (p > 0.05) changes in physico- chemical quality attributes and thus enhancing the shelf life of chilli and coriander powder.
{"title":"Influence of gamma radiation on microbial contamination in chilli and coriander powder: Enhancement of shelf life and stability of physico chemical parameters","authors":"S. Rajput , D. Singh , A.G. Dimri , M. Das","doi":"10.1016/j.nuclphysa.2026.123325","DOIUrl":"10.1016/j.nuclphysa.2026.123325","url":null,"abstract":"<div><div>The study was designed to investigate the different doses of gamma radiation (2.5, 5, 7.5 and 10 kGy) on the microbial load and physicochemical stability of branded and non- branded chilli and coriander powder over a 150 day storage period at room temperature (27 ± 2 °C) and compared with the control sample (unirradiated). Several bacterial species, <em>Bacillus cereus, Salmonella</em> sp. and Sulphite reducing Clostridia were identified in unirradiated spice samples. Results also indicated that gamma radiation processing dose is inversely proportion to the reduction of total microbial population in both the spice samples. Dose of 7.5 kGy for non-branded chilli and coriander powder and 5 kGy for branded showed significant (<em>p</em> < 0.05) removal of microbial load in the studied spices. Insignificant differences were noted in the physico chemical properties including moisture, pH, total ash, acid insoluble ash and crude fibre of spices after 150 days of storage. Acceptability of the irradiated product was assessed by induced radioactivity. These findings suggest that gamma radiation dose of 7.5 kGy for both spice samples had an excellent response for inactivation of naturally occurring microbial flora with insignificant (<em>p</em> > 0.05) changes in physico- chemical quality attributes and thus enhancing the shelf life of chilli and coriander powder.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1068 ","pages":"Article 123325"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the radiation-shielding performance of lead-free barium phosphate glasses doped with manganese(II) oxide and neodymium(III) oxide. Six distinct glass compositions with varying dopant concentrations were analysed using the Phy-X/PSD photon shielding and dosimetry platform to evaluate their effectiveness against ionizing radiation. Over a broad photon energy range (1 keV-100 GeV), key shielding parameters, including the mass and linear attenuation coefficients, mean free path, half-value, tenth-value layer, effective atomic number, effective electron density, and fast neutron removal cross-section were systematically assessed. To complement the photon interaction analysis, the NIST ESTAR database and SRIM software were employed to determine projected ranges and stopping powers for electrons and ions (H, He, and C). Furthermore, PHITS Monte Carlo simulations were used to visualize photon transport behaviour and spatial distributions of effective dose rates within the glass samples. The results were compared with eleven reference glass systems reported in the literature. Among the investigated compositions, the sample doped with 2 mol% Nd2O3 exhibited the best overall radiation-shielding performance. The findings indicate that both MnO and Nd2O3-doped barium phosphate glasses demonstrate promising protective capabilities against ionizing radiation and are possible candidates for environmentally friendly shielding materials.
{"title":"Radiation shielding properties of manganese(II) oxide and neodymium(III) oxide-doped barium phosphate glasses: Analytical evaluation and PHITS simulation","authors":"Devendra RajUpadhyay , Uddab Bahadur Bhandari , Prakash Ghorasainee , Raju Khanal","doi":"10.1016/j.nuclphysa.2026.123324","DOIUrl":"10.1016/j.nuclphysa.2026.123324","url":null,"abstract":"<div><div>This study investigates the radiation-shielding performance of lead-free barium phosphate glasses doped with manganese(II) oxide and neodymium(III) oxide. Six distinct glass compositions with varying dopant concentrations were analysed using the Phy-X/PSD photon shielding and dosimetry platform to evaluate their effectiveness against ionizing radiation. Over a broad photon energy range (1 keV-100 GeV), key shielding parameters, including the mass and linear attenuation coefficients, mean free path, half-value, tenth-value layer, effective atomic number, effective electron density, and fast neutron removal cross-section were systematically assessed. To complement the photon interaction analysis, the NIST ESTAR database and SRIM software were employed to determine projected ranges and stopping powers for electrons and ions (H<span><math><msup><mrow></mrow><mo>+</mo></msup></math></span>, He<span><math><msup><mrow></mrow><mo>+</mo></msup></math></span>, and C<span><math><msup><mrow></mrow><mo>+</mo></msup></math></span>). Furthermore, PHITS Monte Carlo simulations were used to visualize photon transport behaviour and spatial distributions of effective dose rates within the glass samples. The results were compared with eleven reference glass systems reported in the literature. Among the investigated compositions, the sample doped with 2 mol% Nd<sub>2</sub>O<sub>3</sub> exhibited the best overall radiation-shielding performance. The findings indicate that both MnO and Nd<sub>2</sub>O<sub>3</sub>-doped barium phosphate glasses demonstrate promising protective capabilities against ionizing radiation and are possible candidates for environmentally friendly shielding materials.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1068 ","pages":"Article 123324"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laser-induced nuclear phenomena are progressing rapidly with significant advancements in the field of controlled nuclear reactions. This study introduces a novel cross-disciplinary extension of laser-matter interaction theories to nuclear decay processes, opening up possibilities for controlled manipulation of nuclear lifetimes using high-intensity laser environments. We have investigated X-ray laser-assisted α-particle tunneling in even-even and doubly-odd heavy radioactive nuclei using a Floquet-Volkoff (FV) formalism for multiphoton-induced α-decay. This approach is grounded in a microscopic phenomenological framework that incorporates the Skyrme force model of α-nucleus potential within the Wentzel-Kramers-Brillouin (WKB) approximation. Our results demonstrate that emission of the α-particle is influenced by multiphoton absorption to a considerable extent. The nuclei with larger effective charge (Zeff) and smaller disintegration energies (Qα-value) are found to be more sensitive to such perturbations. It is found that the logarithmic values of relative enhancement in the penetration probabilities (log10ΔPrel-values) can be effectively parameterized as a function of Zeff. Furthermore, the relative enhancement in penetration probability (ΔPrel) can be directly related to the change in α-decay half-lives i.e. ΔTrel-values.
{"title":"Dynamical aspects of induced α-decay process under X-ray laser field","authors":"Shubham Bharmoria , Sukhdeep Kaur , BirBikram Singh , Harjeet Kaur","doi":"10.1016/j.nuclphysa.2026.123335","DOIUrl":"10.1016/j.nuclphysa.2026.123335","url":null,"abstract":"<div><div>Laser-induced nuclear phenomena are progressing rapidly with significant advancements in the field of controlled nuclear reactions. This study introduces a novel cross-disciplinary extension of laser-matter interaction theories to nuclear decay processes, opening up possibilities for controlled manipulation of nuclear lifetimes using high-intensity laser environments. We have investigated X-ray laser-assisted <em>α</em>-particle tunneling in even-even and doubly-odd heavy radioactive nuclei using a Floquet-Volkoff (<em>FV</em>) formalism for multiphoton-induced <em>α</em>-decay. This approach is grounded in a microscopic phenomenological framework that incorporates the Skyrme force model of <em>α</em>-nucleus potential within the Wentzel-Kramers-Brillouin (WKB) approximation. Our results demonstrate that emission of the <em>α</em>-particle is influenced by multiphoton absorption to a considerable extent. The nuclei with larger effective charge (<em>Z</em><sub>eff</sub>) and smaller disintegration energies (<em>Q<sub>α</sub></em>-value) are found to be more sensitive to such perturbations. It is found that the logarithmic values of relative enhancement in the penetration probabilities (log<sub>10</sub>Δ<em>P</em><sub>rel</sub>-values) can be effectively parameterized as a function of <em>Z</em><sub>eff</sub>. Furthermore, the relative enhancement in penetration probability (Δ<em>P</em><sub>rel</sub>) can be directly related to the change in <em>α</em>-decay half-lives i.e. Δ<em>T</em><sub>rel</sub>-values.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1068 ","pages":"Article 123335"},"PeriodicalIF":2.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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