Low-lying electric and magnetic dipole strengths in Pb207
Low-lying electric and magnetic dipole strengths in Pb207
复制标题
Pb2O7 中的低位电偶极子强度和磁偶极子强度
DOI：
10.1103/physrevc.103.024309
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发表时间：
2021
影响因子：
3.1
通讯作者：
Miyamoto S.
中科院分区：
文献类型：
--
作者：
Shizuma T.;Minato F.;Omer M.;Hayakawa T.;Ohgaki H.;Miyamoto S.
使用准单色线偏振光子束通过核光子散射测量低位偶极子跃迁。所观察到的状态的自旋和/或奇偶校验是根据共振散射射线相对于入射光子束的偏振平面的强度不对称性来确定的。获得了 5.49 至 6.75 MeV 激发能量的电 () 和磁 () 偶极子强度。本实验结果结合文献数据，通过与准粒子随机相近似模型的粒子振动耦合预测进行比较，研究了中子分离能附近的光吸收截面。
Low-lying dipole transitions inwere measured via nuclear photon scattering using a quasimonochromatic, linearly polarized photon beam. The spins and/or parities of the states observed inwere determined from the intensity asymmetry of resonantly scatteredrays with respect to the polarization plane of the incident photon beam. The electric () and magnetic () dipole strengths were obtained for excitation energies from 5.49 to 6.75 MeV. The present experimental results, combined withdata from the literature, were used to investigate theandphotoabsorption cross sections near the neutron separation energy by comparison with predictions from the particle-vibration coupling with the quasiparticle random-phase approximation model.