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Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus
Ma, CW(马春旺); Yang, JB; Yu, MA; Pu, J(普洁); Wang, SS; Wei, HL
2012
Source PublicationCHINESE PHYSICS LETTERS
ISSN0256-307X
Volume29Issue:9
AbstractUsing an isobaric method, the symmetry-energy coefficient (a(sym)) of a neutron-rich nucleus is obtained from experimental binding energies. The shell effects are shown in a(sym)*/A equivalent to 4a(sym)/A of nuclei. A (sub) magic neutron magic number N = 40 is suggested in a very neutron-rich nucleus, and a(sym)*/A of a nucleus is found to decrease when its mass increases. The a(sym)*/A of a very neutron-rich nucleus with large mass saturates. The volume-symmetry coefficients (b(v)) and surface-symmetry coefficients (b(s)) of a neutron-rich nucleus are extracted from a(sym)*/A by a correlation a(sym)*/A = b(v)/A - b(s)/A (4/3). It is found that b(v) and b(s) decrease when the nucleus becomes more neutron-rich, and tend to saturate in the very neutron-rich nucleus. A linear correlation between b(v) and b(s) is obtained in nuclei with different neutron-excess I, and b(v) of I > 7 nuclei is found to coincide with the results of infinite nuclear matter a(sym) = 32 +/- 4 MeV, and b(s)/b(v) of the nucleus is found to coincide with the results of the finite-range liquid-drop model results.
Language英语
Funding Project应物所项目组
WOS IDWOS:000309112300009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13302
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Ma, CW,Yang, JB,Yu, MA,et al. Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus[J]. CHINESE PHYSICS LETTERS,2012,29(9).
APA Ma, CW,Yang, JB,Yu, MA,Pu, J,Wang, SS,&Wei, HL.(2012).Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus.CHINESE PHYSICS LETTERS,29(9).
MLA Ma, CW,et al."Surface and Volume Symmetry Energy Coefficients of a Neutron-Rich Nucleus".CHINESE PHYSICS LETTERS 29.9(2012).
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