β decay of Si38,40 ( Tz=+5,+6 ) to low-lying core excited states in odd-odd P38,40 isotopes
β decay of Si38,40 ( Tz=+5,+6 ) to low-lying core excited states in odd-odd P38,40 isotopes
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Si38,40 ( Tz= 5, 6 ) β 衰变到奇奇 P38,40 同位素中的低位核心激发态
DOI：
10.1103/physrevc.95.024308
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发表时间：
2017
影响因子：
3.1
通讯作者：
Fallon, P.
中科院分区：
文献类型：
--
作者：
Tripathi, Vandana;Lubna, R. S.;Abromeit, B.;Crawford, H. L.;Liddick, S. N.;Utsuno, Y.;Bender, P. C.;Crider, B. P.;Dungan, R.;Fallon, P.
在原子核的衰变过程中已经发现了低激发态。根据所观察到的Gamow-Teller(GT)衰变的允许性质，这些态被指定为自旋和宇称，并且是核心激发的1p1h入侵态，其宇称与基态相反。低能下入侵态的出现突出了配对和四极关联能对降低入侵态的重要性，尽管存在剪切能隙。利用最新的SDPF-MU有效相互作用进行组态相互作用壳模型计算，以了解偶磷同位素中这些1p1h态的结构。研究发现，In中的态具有非常复杂的组态，涉及所有导致变形状态的理论轨道，如在富中子核中所见。计算的衰变GT矩阵元素突出了核心中子而不是价中子衰变的主导地位。
Low-lying excited states inhave been identified in thedecay of. Based on the allowed nature of the Gamow-Teller (GT) decay observed, these states are assigned spin and parity ofand are core-excited 1p1h intruder states with a parity opposite to the ground state. The occurrence of intruder states at low energies highlights the importance of pairing and quadrupole correlation energies in lowering the intruder states despite theshell gap. Configuration interaction shell model calculations with the state-of-art SDPF-MU effective interaction were performed to understand the structure of these 1p1h states in the even-phosphorus isotopes. States inwithwere found to have very complex configurations involving all theorbitals leading to deformed states as seen in neutron-rich nuclei with. The calculated GT matrix elements for thedecay highlight the dominance of the decay of the core neutrons rather than the valence neutrons.