A shell-model investigation is performed to show the impact on the structure of ^14C from the off-diagonal cross-shell interaction, pp｜V ｜sdsd, which represents the mixing between the 0 and 2 ω configurations in th...A shell-model investigation is performed to show the impact on the structure of ^14C from the off-diagonal cross-shell interaction, pp｜V ｜sdsd, which represents the mixing between the 0 and 2 ω configurations in the psd model space. The observed levels of the positive states in ^14C can be nicely described in 0-4 ω or a larger model space through the well defined Hamiltonians, YSOX and WBP, with a reduction of the strength of the pp｜V ｜sdsd interaction in the latter. The observed B（GT） values for ^14C can be generally described by YSOX, while WBP and their modifications of the〈 pp｜V｜sdsd〉interaction fail for some values. Further investigation shows the effect of such interactions on the configuration mixing and occupancy. The present work shows examples of how the off-diagonal cross-shell interaction strongly drives the nuclear structure.展开更多
通过对贵州东南部雷公坪泥炭进行年代学和有机碳同位素测定,雷公坪泥炭剖面底部150 cm处年龄为13360±40 a B.P.,在中部70 cm处年龄为4570±30 a B.P.,顶部10 cm处年龄为420±30 a B.P.,建立了雷公坪泥炭沉积的年代学序列,...通过对贵州东南部雷公坪泥炭进行年代学和有机碳同位素测定,雷公坪泥炭剖面底部150 cm处年龄为13360±40 a B.P.,在中部70 cm处年龄为4570±30 a B.P.,顶部10 cm处年龄为420±30 a B.P.,建立了雷公坪泥炭沉积的年代学序列,计算出泥炭层堆积速率由上至下分别为23.81 cm·ka^(-1)、14.46 cm·ka^(-1)、9.10 cm·ka^(-1)。获得泥炭层泥炭有机碳同位素δ^(13)C分别为-27.5‰、-28.8‰、-28.5‰,结合其他区域气候记录推断,说明研究区泥炭发育于相对温暖湿润的气候环境。展开更多
基金Supported by National Natural Science Foundation of China(11305272)Special Program for Applied Research on Super Computation of the NSFC Guangdong Joint Fund(the second phase)+3 种基金the Guangdong Natural Science Foundation(2014A030313217)the Pearl River S&T Nova Program of Guangzhou(201506010060)the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong special support program(2016TQ03N575)the Fundamental Research Funds for the Central Universities(17lgzd34)
文摘A shell-model investigation is performed to show the impact on the structure of ^14C from the off-diagonal cross-shell interaction, pp｜V ｜sdsd, which represents the mixing between the 0 and 2 ω configurations in the psd model space. The observed levels of the positive states in ^14C can be nicely described in 0-4 ω or a larger model space through the well defined Hamiltonians, YSOX and WBP, with a reduction of the strength of the pp｜V ｜sdsd interaction in the latter. The observed B（GT） values for ^14C can be generally described by YSOX, while WBP and their modifications of the〈 pp｜V｜sdsd〉interaction fail for some values. Further investigation shows the effect of such interactions on the configuration mixing and occupancy. The present work shows examples of how the off-diagonal cross-shell interaction strongly drives the nuclear structure.
文摘通过对贵州东南部雷公坪泥炭进行年代学和有机碳同位素测定,雷公坪泥炭剖面底部150 cm处年龄为13360±40 a B.P.,在中部70 cm处年龄为4570±30 a B.P.,顶部10 cm处年龄为420±30 a B.P.,建立了雷公坪泥炭沉积的年代学序列,计算出泥炭层堆积速率由上至下分别为23.81 cm·ka^(-1)、14.46 cm·ka^(-1)、9.10 cm·ka^(-1)。获得泥炭层泥炭有机碳同位素δ^(13)C分别为-27.5‰、-28.8‰、-28.5‰,结合其他区域气候记录推断,说明研究区泥炭发育于相对温暖湿润的气候环境。
