Pub Date : 2024-08-28DOI: 10.1134/s1062873824707359
V. M. Skorkin, S. I. Potashev, A. A. Kasparov
Abstract
To study the cluster structure of light nuclei in the reactions of interaction of fast neutrons with the 9Be nucleus, the kinematics of the reactions n +9Be → α + 6He and n +9Be → 8Be + 2n → 2α + 2n at energies of 1–3 MeV were modeled. It was shown that the characteristics of reaction channels in the interaction of a neutron with a 9Be nucleus can be found by measuring the ionization losses of charged reaction fragments in a multilayer gas-filled charged particle detector with a beryllium converter.
{"title":"Modeling of Cluster Decay of Light Nuclei by the Interaction of the 9Be Nucleus with Fast Neutrons in an Ionization Chamber","authors":"V. M. Skorkin, S. I. Potashev, A. A. Kasparov","doi":"10.1134/s1062873824707359","DOIUrl":"https://doi.org/10.1134/s1062873824707359","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>To study the cluster structure of light nuclei in the reactions of interaction of fast neutrons with the <sup>9</sup>Be nucleus, the kinematics of the reactions <i>n +</i> <sup>9</sup>Be → α + <sup>6</sup>He and <i>n +</i> <sup>9</sup>Be → <sup>8</sup>Be + 2<i>n</i> → 2α + 2<i>n</i> at energies of 1–3 MeV were modeled. It was shown that the characteristics of reaction channels in the interaction of a neutron with a <sup>9</sup>Be nucleus can be found by measuring the ionization losses of charged reaction fragments in a multilayer gas-filled charged particle detector with a beryllium converter.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707530
L. N. Generalov, V. A. Zherebtsov, S. M. Selyankina
Abstract
Total cross sections of 19F(d, xt)18F (β+, T1/2 =109.7 min) reaction are evaluated in the range of deuteron energies Ed = 5–16 МeV in our electronic SaBa (Sarov Base) library using mathematic tools (spline approximation) of this library. The reasons for the research were the following. The reaction 19F(d, xt)18F where tritium and 18F nuclei are produced in the same amount has been used for calibration of the tritium detection efficiency in the measurements of cross sections of tritium-producing reactions by the method of tritium accumulation into metal collectors. There was a significant contradiction in experimental data. Our new data for 19F(d, xt)18F reaction at Ed = 6.65 and 6.69 MeV and 19F(d, t0) reaction cross section at Ed = 6.99 and 7.99 MeV appeared. We presented the refinement of the published cross sections of tritium production in reactions on lithium isotopes due to acquisition of evaluated 19F(d, xt)18F reaction cross sections.
{"title":"Cross Sections of Reaction 19F(d, xt)18F","authors":"L. N. Generalov, V. A. Zherebtsov, S. M. Selyankina","doi":"10.1134/s1062873824707530","DOIUrl":"https://doi.org/10.1134/s1062873824707530","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Total cross sections of <sup>19</sup>F(<i>d</i>, <i>xt</i>)<sup>18</sup>F (β<sup>+</sup>, <i>T</i><sub>1/2</sub> =109.7 min) reaction are evaluated in the range of deuteron energies <i>E</i><sub>d</sub> = 5–16 МeV in our electronic SaBa (Sarov Base) library using mathematic tools (spline approximation) of this library. The reasons for the research were the following. The reaction <sup>19</sup>F(<i>d</i>, <i>xt</i>)<sup>18</sup>F where tritium and <sup>18</sup>F nuclei are produced in the same amount has been used for calibration of the tritium detection efficiency in the measurements of cross sections of tritium-producing reactions by the method of tritium accumulation into metal collectors. There was a significant contradiction in experimental data. Our new data for <sup>19</sup>F(<i>d</i>, <i>xt</i>)<sup>18</sup>F reaction at <i>E</i><sub>d</sub> = 6.65 and 6.69 MeV and <sup>19</sup>F(<i>d</i>, <i>t</i><sub>0</sub>) reaction cross section at <i>E</i><sub>d</sub> = 6.99 and 7.99 MeV appeared. We presented the refinement of the published cross sections of tritium production in reactions on lithium isotopes due to acquisition of evaluated <sup>19</sup>F(<i>d</i>, <i>xt</i>)<sup>18</sup>F reaction cross sections.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707372
V. I. Zherebchevsky, V. P. Kondratiev, V. V. Vechernin, N. A. Maltsev, S. N. Igolkin, G. A. Feofilov, V. V. Petrov, S. Yu. Torilov, N. A. Prokofiev, S. N. Belokurova, E. O. Zemlin, D. A. Komarova
Abstract
The modern vertex detectors based on silicon sensors (tracking systems of leading experiments at the Large Hadron Collider and vertex detectors of the MPD and SPD experiments at the NICA accelerator complex) are discussed. The development of concepts for new detector systems using thin silicon pixel detectors for the precision identification of charmed hadrons decay vertices is considered. Results from developing cooling systems for large-area ultrathin silicon detector modules and studies of the properties and characteristics of silicon pixel sensors based on CMOS technology are presented in the context of detecting rare decays of hadrons containing heavy quarks.
摘要 讨论了基于硅传感器的现代顶点探测器（大型强子对撞机主要实验的跟踪系统和 NICA 加速器综合体 MPD 和 SPD 实验的顶点探测器）。还考虑了利用薄硅像素探测器开发新探测器系统的概念，以精确识别粲中子衰变顶点。在探测含有重夸克的强子的稀有衰变方面，介绍了为大面积超薄硅探测器模块开发冷却系统的结果，以及对基于CMOS技术的硅像素传感器的性能和特点的研究。
{"title":"Silicon Detector Systems for Investigating Superdense Nuclear Matter at the NICA Accelerator Complex","authors":"V. I. Zherebchevsky, V. P. Kondratiev, V. V. Vechernin, N. A. Maltsev, S. N. Igolkin, G. A. Feofilov, V. V. Petrov, S. Yu. Torilov, N. A. Prokofiev, S. N. Belokurova, E. O. Zemlin, D. A. Komarova","doi":"10.1134/s1062873824707372","DOIUrl":"https://doi.org/10.1134/s1062873824707372","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The modern vertex detectors based on silicon sensors (tracking systems of leading experiments at the Large Hadron Collider and vertex detectors of the MPD and SPD experiments at the NICA accelerator complex) are discussed. The development of concepts for new detector systems using thin silicon pixel detectors for the precision identification of charmed hadrons decay vertices is considered. Results from developing cooling systems for large-area ultrathin silicon detector modules and studies of the properties and characteristics of silicon pixel sensors based on CMOS technology are presented in the context of detecting rare decays of hadrons containing heavy quarks.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707487
S. I. Potashev, Yu. M. Burmistrov, A. I. Drachev, A. A. Kasparov, V. N. Ponomarev
Abstract
The distributions of intermediate and slow neutrons from the outlet collimated channel of a photoneutron source are measured. A significant difference is observed between the shapes of the distributions of two groups of neutrons with energies above and below the cadmium cutoff. Whereas the distribution of intermediate neutrons has a symmetrical Gaussian shape, the distribution of slow neutrons has a complex shape. The possible causes of the difference between these shapes are discussed.
{"title":"Difference between the Distributions of Intermediate and Slow Neutrons from the Outlet Channel of a Photoneutron Source","authors":"S. I. Potashev, Yu. M. Burmistrov, A. I. Drachev, A. A. Kasparov, V. N. Ponomarev","doi":"10.1134/s1062873824707487","DOIUrl":"https://doi.org/10.1134/s1062873824707487","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The distributions of intermediate and slow neutrons from the outlet collimated channel of a photoneutron source are measured. A significant difference is observed between the shapes of the distributions of two groups of neutrons with energies above and below the cadmium cutoff. Whereas the distribution of intermediate neutrons has a symmetrical Gaussian shape, the distribution of slow neutrons has a complex shape. The possible causes of the difference between these shapes are discussed.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707311
A. A. Kasparov, M. V. Mordovskoy, A. A. Afonin, D. G. Tsvetkovich
Abstract
An experiment was proposed to determine the low-energy parameters of the np interaction in the nd breakup reaction at a neutron energy of 5 MeV in the RADEX neutron channel, Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia. The energy of the virtual 1S0 state and the np scattering length can be obtained from the experimental dependence of the reaction yield on the relative energy of motion of the breakup neutron and proton in the kinematic region, where the np interaction in the final state is most pronounced. The reaction events were simulated, based on which the optimal conditions for the future experiment were selected.
{"title":"Simulation and Selection of the Optimal Experimental Conditions to Determine the Low-Energy Parameters of the np Interaction in the nd Breakup Reaction at a Neutron Energy of 5 MeV","authors":"A. A. Kasparov, M. V. Mordovskoy, A. A. Afonin, D. G. Tsvetkovich","doi":"10.1134/s1062873824707311","DOIUrl":"https://doi.org/10.1134/s1062873824707311","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>An experiment was proposed to determine the low-energy parameters of the <i>np</i> interaction in the <i>nd</i> breakup reaction at a neutron energy of 5 MeV in the RADEX neutron channel, Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia. The energy of the virtual <sup>1</sup><i>S</i><sub>0</sub> state and the <i>np</i> scattering length can be obtained from the experimental dependence of the reaction yield on the relative energy of motion of the breakup neutron and proton in the kinematic region, where the <i>np</i> interaction in the final state is most pronounced. The reaction events were simulated, based on which the optimal conditions for the future experiment were selected.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707335
A. M. Lapik, S. S. Belyshev, V. V. Varlamov, L. Z. Dzhilavyan, A. A. Kuznetsov, A. L. Polonski, A. V. Rusakov, V. I. Shvedunov
Abstract
To study the E1 giant resonance in atomic nuclei, it is important to study the energy and emission angle distributions of fast neutrons from (γ, n)-reactions. The paper considers some features of such studies on beams of γ-quanta produced by inverse Compton scattering with small spreads of their energy, angles, transverse dimensions, duration, and polarization in these beams. It is proposed to use fast neutron spectrometers using both amplitude and time-of-flight data.
{"title":"The Energy and Angular Distributions of Neutrons from (γ, N)-Reactions on γ-Beams Produced by Backward Compton Scattering at Eγ ≲ 40 MeV","authors":"A. M. Lapik, S. S. Belyshev, V. V. Varlamov, L. Z. Dzhilavyan, A. A. Kuznetsov, A. L. Polonski, A. V. Rusakov, V. I. Shvedunov","doi":"10.1134/s1062873824707335","DOIUrl":"https://doi.org/10.1134/s1062873824707335","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>To study the E1 giant resonance in atomic nuclei, it is important to study the energy and emission angle distributions of fast neutrons from (γ, <i>n</i>)-reactions. The paper considers some features of such studies on beams of γ-quanta produced by inverse Compton scattering with small spreads of their energy, angles, transverse dimensions, duration, and polarization in these beams. It is proposed to use fast neutron spectrometers using both amplitude and time-of-flight data.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707347
Yu. S. Lutostansky, A. N. Fazliakhmetov, B. K. Lubsandorzhiev, N. A. Belogortseva, G. A. Koroteev, A. Yu. Lutostansky, V. N. Tikhonov
Abstract
The interaction of solar neutrinos with the 128Te and 130Te isotopes was studied taking into account the resonance structure of charge-exchange strength functions S(E). An analysis was made of both experimental data on the strength functions S(E) obtained in the reactions (3He, t) and the strength functions S(E) calculated in the microscopic theory of finite Fermi systems. The resonance structure of the S(E) strength function was investigated, and the Gamow–Teller, analog, and pygmy resonances were identified. The capture cross sections σ(E) of solar neutrinos by the two isotopes were calculated with consideration of the resonance structure of the strength function S(E), and the influence of the resonances on the energy dependence σ(E) was analyzed. It was shown that, when calculating the cross section σ(E), the resonance structure of the strength function S(E) should be taken into account.
{"title":"Interaction of Solar Neutrinos with 128Te and 130Te","authors":"Yu. S. Lutostansky, A. N. Fazliakhmetov, B. K. Lubsandorzhiev, N. A. Belogortseva, G. A. Koroteev, A. Yu. Lutostansky, V. N. Tikhonov","doi":"10.1134/s1062873824707347","DOIUrl":"https://doi.org/10.1134/s1062873824707347","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The interaction of solar neutrinos with the <sup>128</sup>Te and <sup>130</sup>Te isotopes was studied taking into account the resonance structure of charge-exchange strength functions <i>S</i>(<i>E</i>). An analysis was made of both experimental data on the strength functions <i>S</i>(<i>E</i>) obtained in the reactions (<sup>3</sup>He, <i>t</i>) and the strength functions <i>S</i>(<i>E</i>) calculated in the microscopic theory of finite Fermi systems. The resonance structure of the <i>S</i>(<i>E</i>) strength function was investigated, and the Gamow–Teller, analog, and pygmy resonances were identified. The capture cross sections σ(<i>E</i>) of solar neutrinos by the two isotopes were calculated with consideration of the resonance structure of the strength function <i>S</i>(<i>E</i>), and the influence of the resonances on the energy dependence σ(<i>E</i>) was analyzed. It was shown that, when calculating the cross section σ(<i>E</i>), the resonance structure of the strength function <i>S</i>(<i>E</i>) should be taken into account.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707438
A. T. D’yachenko, I. A. Mitropolsky
Abstract
Equations of quantum hydrodynamics were obtained from the Schrödinger equation considering dissipation, which in the semiclassical limit are reduced to the conventional equations of hydrodynamics of an ideal fluid. An analytical solution to the hydrodynamic equations was found in the quantum shock wave approximation in one- and two-dimensional cases. The dissipative function can be found using a nonequilibrium approach. A comparison was made with experimental data to describe the emission of protons in collisions of medium-sized atomic nuclei of intermediate energies.
{"title":"Schrödinger Equation and Quantum Shock Waves when Describing Collisions of Atomic Nuclei","authors":"A. T. D’yachenko, I. A. Mitropolsky","doi":"10.1134/s1062873824707438","DOIUrl":"https://doi.org/10.1134/s1062873824707438","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Equations of quantum hydrodynamics were obtained from the Schrödinger equation considering dissipation, which in the semiclassical limit are reduced to the conventional equations of hydrodynamics of an ideal fluid. An analytical solution to the hydrodynamic equations was found in the quantum shock wave approximation in one- and two-dimensional cases. The dissipative function can be found using a nonequilibrium approach. A comparison was made with experimental data to describe the emission of protons in collisions of medium-sized atomic nuclei of intermediate energies.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s1062873824707517
V. N. Kovalenko, V. V. Petrov
Abstract
The possibility of searching for the effects of local spatial parity violation in strong interactions in the decay of a charged a0 meson into a charged pion and photon was investigated. Using the Pythia Monte Carlo generator, the spectrum of invariant masses of π±γ pairs was studied, taking into account the decay channel (a_{0}^{ pm }) → π± + γ. An estimate was made of the minimum number of pp and Pb–Pb collision events at a significant level of the P-violating decay signal.
摘要 研究了在带电a0介子衰变为带电先锋和光子的强相互作用中寻找局部空间奇偶性违反效应的可能性。利用 Pythia Monte Carlo 发生器研究了π±γ 对的不变质量谱，同时考虑了衰变通道 (a_{0}^{ pm }) → π± + γ。 估计了pp和Pb-Pb碰撞事件在显著的违反P的衰变信号水平下的最小数目。
{"title":"The Possibility of Finding the P Symmetry Breaking Decay of the Charged a0 Meson","authors":"V. N. Kovalenko, V. V. Petrov","doi":"10.1134/s1062873824707517","DOIUrl":"https://doi.org/10.1134/s1062873824707517","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The possibility of searching for the effects of local spatial parity violation in strong interactions in the decay of a charged <i>a</i><sub>0</sub> meson into a charged pion and photon was investigated. Using the Pythia Monte Carlo generator, the spectrum of invariant masses of π<sup>±</sup>γ pairs was studied, taking into account the decay channel <span>(a_{0}^{ pm })</span> → π<sup>±</sup> + γ. An estimate was made of the minimum number of <i>pp</i> and Pb–Pb collision events at a significant level of the <i>P</i>-violating decay signal.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-28DOI: 10.1134/s106287382470730x
Yu. B. Gurov, V. G. Sandukovsky, M. V. Tel’kushev, B. A. Chernyshev
Abstract
The formation of highly excited states (Ex > 8 MeV) of neutron-rich isotopes of helium and lithium is studied in reactions of the absorption of stopped pions by 9Be, 10, 11B, and 12, 14C nuclei. Results for most nuclei are obtained in several reaction channels at once. Candidates for cluster resonances and isobaric analogue states are observed.
{"title":"Highly Excited States of Neutron-Rich Isotopes of Light Nuclei","authors":"Yu. B. Gurov, V. G. Sandukovsky, M. V. Tel’kushev, B. A. Chernyshev","doi":"10.1134/s106287382470730x","DOIUrl":"https://doi.org/10.1134/s106287382470730x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The formation of highly excited states (<i>E</i><sub><i>x</i></sub> > 8 MeV) of neutron-rich isotopes of helium and lithium is studied in reactions of the absorption of stopped pions by <sup>9</sup>Be, <sup>10, 11</sup>B, and <sup>12, 14</sup>C nuclei. Results for most nuclei are obtained in several reaction channels at once. Candidates for cluster resonances and isobaric analogue states are observed.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":null,"pages":null},"PeriodicalIF":0.48,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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