Intermediate-energy Coulomb excitation of 104 Sn: Moderate E2 strength decrease approaching 100 Sn
Intermediate-energy Coulomb excitation of 104 Sn: Moderate E2 strength decrease approaching 100 Sn
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104 Sn 的中能库仑激发：接近 100 Sn 时 E2 强度适度下降
DOI：
10.1103/physrevc.90.061302
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发表时间：
2013
影响因子：
3.1
通讯作者：
R. Taniuchi
中科院分区：
文献类型：
--
作者：
P. Doornenbal;S. Takeuchi;N. Aoi;M. Matsushita;A. Obertelli;D. Steppenbeck;H. Wang;L. Audirac;H. Baba;P.Bednarczyk;S. Boissinot;M. Ciemala;A. Corsi;T. Furumoto;T. Isobe;A. Jungclaus;V. Lapoux;J. Lee;K. Matsui;T. Motobayashi;D. Nishimura;S. Ota;E. Pollacco;H. Sakurai;C. Santamaria;Y. Shiga;D. Sohler;R. Taniuchi
用库仑激发法测量了104 Sn核2 +第一激发态的约化跃迁几率B（E2）↑。从铅靶上的绝对截面中提取出的值为0.173（28）e2 B 2。通过对稳定的~（112）Sn的参考测量，估算了~（104）Sn的高激发态的馈电贡献。相对于在富含质子的偶数A 106−114 Sn同位素中观察到的几乎恒定的值，激发强度仅适度降低，目前最先进的壳层模型预测，包括N = Z = 50壳层闭合的质子和中子激发以及标准极化电荷，低估了实验结果。
The reduced transition probability B(E2)↑ of the first excited 2 + state in the nucleus 104 Sn was measured via Coulomb excitation in inverse kinematics at intermediate energies. A value of 0.173(28) e 2 b 2 was extracted from the absolute cross section on a Pb target. Feeding contributions in 104 Sn from higher lying states were estimated by a reference measurement of the stable 112 Sn. Corresponding only to a moderate decrease of excitation strength relative to the almost constant values observed in the proton-rich, even-A 106−114 Sn isotopes, present state-of-the-art shell-model predictions, which include proton and neutron excitations across the N = Z = 50 shell closures as well as standard polarization charges, underestimate the experimental findings.