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Structures of exotic Sn-131,Sn-133 isotopes and effect on r-process nucleosynthesis
Zhang, SS; Smith, MS; Arbanas, G; Kozub, RL; Zhang, SS (reprint author), Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China.
2012
发表期刊PHYSICAL REVIEW C
ISSN0556-2813
卷号86期号:3页码:32802
摘要Background: Four strong single-particle bound levels with strikingly similar level spacings have recently been measured in Sn-131 and Sn-133. This similarity has not yet been addressed by a theoretical nuclear structure model. Information on these single-particle bound levels, as well as on resonant levels above the neutron capture threshold, is also needed to determine neutron capture cross sections-and corresponding capture reaction rates-on Sn-130,Sn-132. The Sn-130(n,gamma) rate was shown in a recent sensitivity study to significantly impact the synthesis of heavy elements in the r-process in supernovae. Purpose: Understand the structure of bound and resonant levels in Sn-131,Sn-133, and determine if the densities of unbound resonant levels are sufficiently high to warrant statistical model treatments of neutron capture on Sn-130,Sn-132. Method: Single-particle bound and resonant levels for Sn-131,Sn-133 are self-consistently calculated by the analytical continuation of the coupling constant (ACCC) method based on a relativistic mean field (RMF) theory with BCS approximation. Results: We obtain four strong single-particle bound levels in both Sn-131,Sn-133 with an ordering that agrees with experiments and spacings that, while differing from experiment, are consistent between the Sn isotopes. We also find at most one single-particle level in the effective energy range for neutron captures in the r-process. Conclusions: Our RMF + ACCC + BCS model successfully reproduces observed single-particle bound levels in (131,13)3Sn and self-consistently predicts single-particle resonant levels with densities too low for widely used traditional statistical model treatments of neutron capture cross sections on Sn-130,Sn-132 employing Fermi gas level density formulations.
部门归属[Zhang, Shi-Sheng] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China; [Zhang, Shi-Sheng] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Zhang, Shi-Sheng] Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA; [Smith, M. S.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA; [Arbanas, G.] Oak Ridge Natl Lab, Reactor & Nucl Syst Div, Oak Ridge, TN 37831 USA; [Kozub, R. L.] Tennessee Technol Univ, Dept Phys, Cookeville, TN 38505 USA
关键词Plus Bcs Approach Pairing Correlations Resonant Continuum Single-particle Reaction-rates Level Density Models Halo
学科领域Physics
资助者Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics
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收录类别SCI
语种英语
资助者Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics ; Fundamental Research Funds for Central Universities; Beihang New Star; National Natural Science Foundation of China [10605004, 11035007]; International Science and Technology Cooperation Projects [2012DFG61930]; Topical Collaboration on Theory of Reactions for Unstable iSotopes (TORUS); US Dept. of Energy, Office of Nuclear Physics
WOS记录号WOS:000308737500001
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被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/15029
专题理论物理所SCI论文
通讯作者Zhang, SS (reprint author), Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China.
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Zhang, SS,Smith, MS,Arbanas, G,et al. Structures of exotic Sn-131,Sn-133 isotopes and effect on r-process nucleosynthesis[J]. PHYSICAL REVIEW C,2012,86(3):32802.
APA Zhang, SS,Smith, MS,Arbanas, G,Kozub, RL,&Zhang, SS .(2012).Structures of exotic Sn-131,Sn-133 isotopes and effect on r-process nucleosynthesis.PHYSICAL REVIEW C,86(3),32802.
MLA Zhang, SS,et al."Structures of exotic Sn-131,Sn-133 isotopes and effect on r-process nucleosynthesis".PHYSICAL REVIEW C 86.3(2012):32802.
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