P. Laskos-Patkos, P. Koliogiannis, A. Kanakis-Pegios, C. Moustakidis
In the past few years, a lot of studies devoted to the discovery of universal relations (equation of state independent relations). The significance of such expressions can be understood if we consider that they offer the opportunity for testing general relativity in a way that is independent of the nuclear equation of state and they also allow us to impose constraints on the structure of neutron stars. The aim of this work is twofold. Firstly, we wish to clarify if hot equations of state are able to reproduce established universal relations. Secondly, we investigate a possible universal connection between the binding energy and the dimensionless tidal deformability of a neutron star. These two bulk properties are associated with two very important candidates for multimessenger signals, binary neutron star mergers and supernova explosions. We find that the predictions of hot equations of state do not agree with the predictions from accepted universal relations. Subsequently, the use of universal relations, when thermal effects are present, may be erroneous. Additionally, we find that, for moderate neutron star masses, the binding energy and the dimensionless tidal deformability of a neutron star satisfy a universal relation. The latter allows us to impose constraints on the binding energy of 1.4 Msun neutron star, using information from the analysis of the GW170817 event. Finally, we are able to present a universal relation between the compactness, the binding energy and the dimensionless tidal deformability, which is independent of the employed equation of state for zero and finite temperature.
{"title":"Universal relations and finite temperature neutron stars","authors":"P. Laskos-Patkos, P. Koliogiannis, A. Kanakis-Pegios, C. Moustakidis","doi":"10.12681/hnpsanp.5098","DOIUrl":"https://doi.org/10.12681/hnpsanp.5098","url":null,"abstract":"In the past few years, a lot of studies devoted to the discovery of universal relations (equation of state independent relations). The significance of such expressions can be understood if we consider that they offer the opportunity for testing general relativity in a way that is independent of the nuclear equation of state and they also allow us to impose constraints on the structure of neutron stars. The aim of this work is twofold. Firstly, we wish to clarify if hot equations of state are able to reproduce established universal relations. Secondly, we investigate a possible universal connection between the binding energy and the dimensionless tidal deformability of a neutron star. These two bulk properties are associated with two very important candidates for multimessenger signals, binary neutron star mergers and supernova explosions. We find that the predictions of hot equations of state do not agree with the predictions from accepted universal relations. Subsequently, the use of universal relations, when thermal effects are present, may be erroneous. Additionally, we find that, for moderate neutron star masses, the binding energy and the dimensionless tidal deformability of a neutron star satisfy a universal relation. The latter allows us to impose constraints on the binding energy of 1.4 Msun neutron star, using information from the analysis of the GW170817 event. Finally, we are able to present a universal relation between the compactness, the binding energy and the dimensionless tidal deformability, which is independent of the employed equation of state for zero and finite temperature.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134623972","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}
G. Siltzovalis, V. Lagaki, I. Madesis, T. Mertzimekis
The scope of this study is to characterize the response of a CdZnTe spectrometer to evaluate its performance for measuring radioactivity in the marine environment. CdZnTe semiconductor detectors have never been used before for such applications. More specifically, a spectrometer with a 4 cm3 CZT crystal was studied under various scenarios, by means of Monte Carlo simulations and lab measurements. Using the Monte Carlo code MCNP5, the effect of the water’s salinity on the detector’s efficiency, as well as the ability of the sensor to localize radioactive sources in the water were examined. Futhermore, the full energy peak efficiency curve and energy resolution of the spectrometer was calculated experimentally in air. Finally, the effective volume of the CdZnTe crystal was estimated through measurements using a collimated point source of 137Cs. First results are considered satisfactory, however additional scenarios should be examined in the near future to further characterize the response of the detector.
{"title":"Characterization of a Novel CdZnTe Spectrometer for Measuring Radioactivity in the Marine Environment","authors":"G. Siltzovalis, V. Lagaki, I. Madesis, T. Mertzimekis","doi":"10.12681/hnpsanp.5096","DOIUrl":"https://doi.org/10.12681/hnpsanp.5096","url":null,"abstract":"The scope of this study is to characterize the response of a CdZnTe spectrometer to evaluate its performance for measuring radioactivity in the marine environment. CdZnTe semiconductor detectors have never been used before for such applications. More specifically, a spectrometer with a 4 cm3 CZT crystal was studied under various scenarios, by means of Monte Carlo simulations and lab measurements. Using the Monte Carlo code MCNP5, the effect of the water’s salinity on the detector’s efficiency, as well as the ability of the sensor to localize radioactive sources in the water were examined. Futhermore, the full energy peak efficiency curve and energy resolution of the spectrometer was calculated experimentally in air. Finally, the effective volume of the CdZnTe crystal was estimated through measurements using a collimated point source of 137Cs. First results are considered satisfactory, however additional scenarios should be examined in the near future to further characterize the response of the detector. ","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"76 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132512240","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}
This position paper advocates preparatory actions for the incorporation of fission energy into the Greek mix, should this be necessary within the foreseeable future. To this end, and first of all, a concise understanding of the current Greek energy mix and its perspectives is essential in connection to the potential problems due to the expansion of renewable energy. Present and future inefficiencies could be avoided to a manageable extend, mainly by energy savings, mostly applicable for buildings consumption and also by upgrades towards a much denser grid, capable of reversing flows, along with energy storage facilities. In parallel, an assessment of the introduction potential of nuclear power could be examined. The assessment could involve political parties, scientists and other stakeholders, pro and against, and might reasonably result to justified arguments capable of raising public awareness. The country's preparedness to go nuclear could depend more or less on the degree of local energy market regulation framework, on the local and broader investment and financial environment, on the power plant construction and operation insurance possibilities, on the review and introduction of applicable law for licensing and regulating nuclear power and on the local scientific potential in the nuclear engineering field. Parameters like construction of related major engineering parts locally should also be examined along with compensatory benefits to the domestic economy and the local societies in the vicinity of the reactor sites. It is proposed that this work could be accomplished by an adequate task force without particular costs and within reasonable time.
{"title":"Nuclear power as part of the Greek energy mix: Far better to be cost effectively proactive than unconditionally inactive","authors":"N. Petropoulos, D. Mitrakos","doi":"10.12681/hnpsanp.5134","DOIUrl":"https://doi.org/10.12681/hnpsanp.5134","url":null,"abstract":"This position paper advocates preparatory actions for the incorporation of fission energy into the Greek mix, should this be necessary within the foreseeable future. To this end, and first of all, a concise understanding of the current Greek energy mix and its perspectives is essential in connection to the potential problems due to the expansion of renewable energy. Present and future inefficiencies could be avoided to a manageable extend, mainly by energy savings, mostly applicable for buildings consumption and also by upgrades towards a much denser grid, capable of reversing flows, along with energy storage facilities. In parallel, an assessment of the introduction potential of nuclear power could be examined. The assessment could involve political parties, scientists and other stakeholders, pro and against, and might reasonably result to justified arguments capable of raising public awareness. The country's preparedness to go nuclear could depend more or less on the degree of local energy market regulation framework, on the local and broader investment and financial environment, on the power plant construction and operation insurance possibilities, on the review and introduction of applicable law for licensing and regulating nuclear power and on the local scientific potential in the nuclear engineering field. Parameters like construction of related major engineering parts locally should also be examined along with compensatory benefits to the domestic economy and the local societies in the vicinity of the reactor sites. It is proposed that this work could be accomplished by an adequate task force without particular costs and within reasonable time.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114887229","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}
The synthesis of hyper-heavy elements is investigated under conditions simulating neutron star environment. The constrained molecular dynamics approach is used to simulate low energy collisions of extremely n-rich nuclei. A new type of the fusion barrier due to a “neutron wind” is observed when the effect of neutron star environment (screening of Coulomb interaction) is introduced implicitly. When introducing also a background of surrounding nuclei, the nuclear fusion becomes possible down to temperatures of 108 K and synthesis of extremely heavy and n-rich nuclei appears feasible. A possible existence of hyper-heavy nuclei in a neutron star environment could provide a mechanism of extra coherent neutrino scattering or an additional mechanism, resulting in x-ray burst or a gravitational wave signal and, thus, becoming another crucial process adding new information to the suggested models on neutron star evolution. These proceedings are part of a paper that has already been published and the relevant reference is: M. Veselský et al., PRC 106, L012802 (2022).
在模拟中子星环境的条件下，研究了超重元素的合成。用约束分子动力学方法模拟了极富n核的低能碰撞。当隐含地引入中子星环境的影响(库仑相互作用的屏蔽)时，观察到一种由“中子风”引起的新型聚变势垒。当引入周围核的背景时，核聚变在108 K的温度下是可能的，并且合成极重和富n核是可行的。在中子星环境中可能存在的超重核可以提供额外相干中微子散射的机制或其他机制，从而导致x射线爆发或引力波信号，从而成为另一个关键过程，为建议的中子星演化模型添加新信息。这些记录是已经发表的一篇论文的一部分，相关参考文献是:M. Veselský et al.， PRC 106, L012802(2022)。
{"title":"Investigating the possible existence of hyper-heavy nuclei in a neutron-star environment","authors":"Charalampos Moustakidis","doi":"10.12681/hnpsanp.5080","DOIUrl":"https://doi.org/10.12681/hnpsanp.5080","url":null,"abstract":"The synthesis of hyper-heavy elements is investigated under conditions simulating neutron star environment. The constrained molecular dynamics approach is used to simulate low energy collisions of extremely n-rich nuclei. A new type of the fusion barrier due to a “neutron wind” is observed when the effect of neutron star environment (screening of Coulomb interaction) is introduced implicitly. When introducing also a background of surrounding nuclei, the nuclear fusion becomes possible down to temperatures of 108 K and synthesis of extremely heavy and n-rich nuclei appears feasible. A possible existence of hyper-heavy nuclei in a neutron star environment could provide a mechanism of extra coherent neutrino scattering or an additional mechanism, resulting in x-ray burst or a gravitational wave signal and, thus, becoming another crucial process adding new information to the suggested models on neutron star evolution. These proceedings are part of a paper that has already been published and the relevant reference is: M. Veselský et al., PRC 106, L012802 (2022).","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135111132","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}
High-energy particles and radiation such as protons, pions, muons, neutrinos and gamma-ray photons are known to emit from collimated outflows of magnetized astrophysical plasma known as jets. They are being ejected by Active Galactic Nuclei or X-ray binary systems consisting of a companion star accreting mass onto a black hole or a neutron star. Our work focuses on the calculation of the produced particle energy distributions and mainly on the intensity of gamma-rays. We apply this model to prominent examples of Black Hole XRBs such as Cygnus X-1, SS 433, GRS 1915+105, etc. We also study and work on calculating the absorption of emitted gamma-rays by soft and hard X-ray radiation fields originating from the system’s accretion disc, corona and companion star that could strongly affect the jet’s gamma-ray intensity that finally reaches the Earth.
{"title":"Radiation Emission and Absorption by Astrophysical Jets from XRBs","authors":"T. Papavasileiou, O. Kosmas, Ioannis Sinatkas","doi":"10.12681/hnpsanp.4890","DOIUrl":"https://doi.org/10.12681/hnpsanp.4890","url":null,"abstract":"High-energy particles and radiation such as protons, pions, muons, neutrinos and gamma-ray photons are known to emit from collimated outflows of magnetized astrophysical plasma known as jets. They are being ejected by Active Galactic Nuclei or X-ray binary systems consisting of a companion star accreting mass onto a black hole or a neutron star. Our work focuses on the calculation of the produced particle energy distributions and mainly on the intensity of gamma-rays. We apply this model to prominent examples of Black Hole XRBs such as Cygnus X-1, SS 433, GRS 1915+105, etc. We also study and work on calculating the absorption of emitted gamma-rays by soft and hard X-ray radiation fields originating from the system’s accretion disc, corona and companion star that could strongly affect the jet’s gamma-ray intensity that finally reaches the Earth.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124574835","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}
We will present a recent experiment for elastic scattering of 7Be+natZr at five sub – and near- barrier energies, namely at 21.5, 22.5, 24, 27 and 28 MeV, for determining the optical potential. The experiment was performed at the TriSol radioactive beam facility of Notre Dame University, simultaneously with elastic scattering and breakup measurements of 8B+90Zr , the last performed at 28MeV. This optical potential will be used as one of the coupling potentials in our CDCC calculations for 8B. Further more we will look for the energy dependence of the potential and its resemblance to either the one exhibited by 7Li or the one by 6Li, extracting useful conclusions about their structure. Preliminary data are presented and discussed.
{"title":"Elastic scattering measurements of 7Be+natZr at sub- and near – barrier energies","authors":"A. Pakou","doi":"10.12681/hnpsanp.5006","DOIUrl":"https://doi.org/10.12681/hnpsanp.5006","url":null,"abstract":"We will present a recent experiment for elastic scattering of 7Be+natZr at five sub – and near- barrier energies, namely at 21.5, 22.5, 24, 27 and 28 MeV, for determining the optical potential. The experiment was performed at the TriSol radioactive beam facility of Notre Dame University, simultaneously with elastic scattering and breakup measurements of 8B+90Zr , the last performed at 28MeV. This optical potential will be used as one of the coupling potentials in our CDCC calculations for 8B. Further more we will look for the energy dependence of the potential and its resemblance to either the one exhibited by 7Li or the one by 6Li, extracting useful conclusions about their structure. Preliminary data are presented and discussed.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125929085","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}
Anastasia Milioni, T. Vasilopoulou, M. Savva, M. Anagnostakis, I. Stamatelatos
The true coincidence effect is studied in two High Purity Germanium (HPGe) detectors for a variety of isotopes, source geometries and source to detector configurations, via computational tools based on Monte–Carlo simulations. Τhe upgraded patch of MCNP code MCNP–CP and the 2018 version of PENELOPE, which take into account the decay scheme of each cascade emitter, are used to calculate the Full Energy Peak Efficiency (FEPE) for the corresponding gamma-ray energies. The true coincidence correction (TCC) factor is calculated as the ratio of the FEPE derived for each nuclide taking into consideration the true coincidence effect, to the FEPE estimated without considering the phenomenon. In all cases, a satisfactory agreement is observed between the TCC factors calculated using MCNP–CP and PENELOPE 2018. Moreover, the results of the calculations are compared against experimentally derived efficiency values. The correction factors obtained using the TrueCoinc software are applied on experimentally determined FEPE curves, based on measurements performed using reference sources, and consequently the corrected data are compared against the simulations for the "non-coincidence" case. The results of this work contribute to the validation of the computational tools and codes used to study the true coincidence effect and determine the corresponding correction factors, providing useful data for gamma–spectrometry studies of cascade emitters.
{"title":"True coincidence summing corrections in HPGe detectors","authors":"Anastasia Milioni, T. Vasilopoulou, M. Savva, M. Anagnostakis, I. Stamatelatos","doi":"10.12681/hnpsanp.5187","DOIUrl":"https://doi.org/10.12681/hnpsanp.5187","url":null,"abstract":"The true coincidence effect is studied in two High Purity Germanium (HPGe) detectors for a variety of isotopes, source geometries and source to detector configurations, via computational tools based on Monte–Carlo simulations. Τhe upgraded patch of MCNP code MCNP–CP and the 2018 version of PENELOPE, which take into account the decay scheme of each cascade emitter, are used to calculate the Full Energy Peak Efficiency (FEPE) for the corresponding gamma-ray energies. The true coincidence correction (TCC) factor is calculated as the ratio of the FEPE derived for each nuclide taking into consideration the true coincidence effect, to the FEPE estimated without considering the phenomenon. In all cases, a satisfactory agreement is observed between the TCC factors calculated using MCNP–CP and PENELOPE 2018. Moreover, the results of the calculations are compared against experimentally derived efficiency values. The correction factors obtained using the TrueCoinc software are applied on experimentally determined FEPE curves, based on measurements performed using reference sources, and consequently the corrected data are compared against the simulations for the \"non-coincidence\" case. The results of this work contribute to the validation of the computational tools and codes used to study the true coincidence effect and determine the corresponding correction factors, providing useful data for gamma–spectrometry studies of cascade emitters.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133350456","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}
Studies of (n, cp) reactions are important for a variety of fields, such as Nuclear Astrophysics, Nuclear Medicine, and nuclear energy applications. Accordingly, towards the development of innovative detection systems that could address these needs, within this contribution, the proposed validation of a new annular neutron-Transmutation Doped (nTD) double-sided silicon strip detector (DSSSD) will be overviewed. The most important characteristics will be given along with the expected performance and abilities within the n_TOF facility at CERN. Furthermore, the adopted particle identification technique based on pulse shape discrimination will be outlined. Finally, some preliminary experimental results will be discussed.
{"title":"Charged particles’ detection at n_TOF/CERN: The new annular Double-Sided Silicon Strip Detector","authors":"Styliani Goula","doi":"10.12681/hnpsanp.5216","DOIUrl":"https://doi.org/10.12681/hnpsanp.5216","url":null,"abstract":"Studies of (n, cp) reactions are important for a variety of fields, such as Nuclear Astrophysics, Nuclear Medicine, and nuclear energy applications. Accordingly, towards the development of innovative detection systems that could address these needs, within this contribution, the proposed validation of a new annular neutron-Transmutation Doped (nTD) double-sided silicon strip detector (DSSSD) will be overviewed. The most important characteristics will be given along with the expected performance and abilities within the n_TOF facility at CERN. Furthermore, the adopted particle identification technique based on pulse shape discrimination will be outlined. Finally, some preliminary experimental results will be discussed.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126932362","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}
A. Lagoyannis, M. Andrianis, M. Axiotis, Prodromos Chatzispyroglou, S. Harissopulos, Aggelos Laoutaris, I. Stamatelatos, Tryfon Tsiamis
The infrastructure of the Tandem Accelerator Laboratory (TAL) underwent a major upgrade aiming at expanding its analytical capabilities by introducing new experimental setups by providing the scientific community with better quality beams and. Moreover, through the acquiring of two new accelerators, a 17 MeV Cyclotron and an AMS Tandetron, TAL aims at broadening its multidisciplinary research interests with a wide spectrum of new techniques in the areas of material science, cultural heritage studies, biomedicine, etc. A short description of the upgrades and the new capabilities are presented.
{"title":"Recent upgrades at the Tandem Laboratory of NCSR “Demokritos”","authors":"A. Lagoyannis, M. Andrianis, M. Axiotis, Prodromos Chatzispyroglou, S. Harissopulos, Aggelos Laoutaris, I. Stamatelatos, Tryfon Tsiamis","doi":"10.12681/hnpsanp.5226","DOIUrl":"https://doi.org/10.12681/hnpsanp.5226","url":null,"abstract":"The infrastructure of the Tandem Accelerator Laboratory (TAL) underwent a major upgrade aiming at expanding its analytical capabilities by introducing new experimental setups by providing the scientific community with better quality beams and. Moreover, through the acquiring of two new accelerators, a 17 MeV Cyclotron and an AMS Tandetron, TAL aims at broadening its multidisciplinary research interests with a wide spectrum of new techniques in the areas of material science, cultural heritage studies, biomedicine, etc. A short description of the upgrades and the new capabilities are presented.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125043851","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}
Vasiliki Κ. Kanavou, C. Athanassas, K. Stamoulis, X. Aslanoglou, V. Mouslopoulou
Here, we report preliminary results from thermoluminescence (TL) measurements on metamorphic quartz from the SE Peloponnese, Greece, and we discuss its potential for thermometric and, possibly, thermochronometric applications over longer geological periods. Extensive high pressure/low temperature (HP/LT) schists associated with a 24 Ma metamorphic age, and with cooling ages ranging between 6-14 Ma (based on fission-track and (U-Th)/He thermochronometry), encompass sizable quartzite outcrops associated with substantially low radiation (U, Th, K concentrations below the analytical detection limits), allowing TL signal to grow on longer geological timescales. Although deeper TL traps (>360°C) appeared saturated as expected, geologically stable traps lying between around 360°C were found to be far from saturation. Once higher analytical resolution is achieved in the determination of the radioelement concentrations the recovered equivalent doses will be combined with the respective dose rates to explore the suitability of TL from quartz for longer-range thermochronometry in extremely low-radiation geological environments.
{"title":"Thermochronometry of metamorphic rock complexes on the SE Peloponnese, Greece, using thermoluminescence (TL): preliminary experiments","authors":"Vasiliki Κ. Kanavou, C. Athanassas, K. Stamoulis, X. Aslanoglou, V. Mouslopoulou","doi":"10.12681/hnpsanp.5135","DOIUrl":"https://doi.org/10.12681/hnpsanp.5135","url":null,"abstract":"Here, we report preliminary results from thermoluminescence (TL) measurements on metamorphic quartz from the SE Peloponnese, Greece, and we discuss its potential for thermometric and, possibly, thermochronometric applications over longer geological periods. Extensive high pressure/low temperature (HP/LT) schists associated with a 24 Ma metamorphic age, and with cooling ages ranging between 6-14 Ma (based on fission-track and (U-Th)/He thermochronometry), encompass sizable quartzite outcrops associated with substantially low radiation (U, Th, K concentrations below the analytical detection limits), allowing TL signal to grow on longer geological timescales. Although deeper TL traps (>360°C) appeared saturated as expected, geologically stable traps lying between around 360°C were found to be far from saturation. Once higher analytical resolution is achieved in the determination of the radioelement concentrations the recovered equivalent doses will be combined with the respective dose rates to explore the suitability of TL from quartz for longer-range thermochronometry in extremely low-radiation geological environments.","PeriodicalId":262803,"journal":{"name":"HNPS Advances in Nuclear Physics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129535555","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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