Electromagnetic dipole strength of 136Ba below the neutron separation energy

Electromagnetic dipole strength of 136Ba below the neutron separation energy
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136Ba的电磁偶极子强度低于中子分离能

DOI:
10.1103/physrevc.86.014319
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发表时间:
2012
期刊:
影响因子:
3.1
通讯作者:
G. Rusev
G. Rusev
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
R. Massarczyk;R. Schwengner;F. Dönau;E. Litvinova;G. Rusev

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研究了Ba核的电磁偶极强度。两个测量进行了电子能量为7.0和11.4兆电子伏的韧致辐射设施ELBE加速器的亥姆霍兹Zentrum德累斯顿-罗森多夫。在三角大学核实验室的高强度伽马射线源(HIS)设施上,在4.7和9.3 MeV之间对同一核进行了光子散射实验。geant 4代码已被用来确定探测器的响应和非核散射事件。因此,在不可分辨跃迁的准连续体中,有可能解释偶极强度。一个统计代码被用来模拟非弹性转换,并确定过渡到基态的分支比。所得到的光吸收截面相比,准粒子随机相位近似和相对论准粒子时间阻塞近似计算。
The electromagnetic dipole strength of the nucleusBa has been investigated. Two measurements were performed with electron energies of 7.0 and 11.4 MeV at the bremsstrahlung facility at the ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf. Photon scattering experiments on the same nucleus have been performed at the high-intensity gamma-ray source (HIS) facility of the Triangle Universities Nuclear Laboratory between 4.7 and 9.3 MeV. Thegeant4 code has been used to determine detector response and non-nuclear scattered events. Thus it is possible to account for the dipole strength in the quasicontinuum of unresolvable transitions. A statistical code was used to simulate inelastic transitions and to determine the branching ratios of transitions to the ground state. The resulting photoabsorption cross section is compared to quasiparticle random-phase approximation and relativistic quasiparticle time blocking approximation calculations.
相对论准粒子时间阻塞近似:开壳核的偶极子响应
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