Dipole strength distribution in Pb206 for the evaluation of the neutron capture cross section of Pb205
Dipole strength distribution in Pb206 for the evaluation of the neutron capture cross section of Pb205
复制标题
Pb2O6 中的偶极子强度分布，用于评估 Pb2O5 的中子俘获截面
DOI：
10.1103/physrevc.98.064317
复制
发表时间：
2018
影响因子：
3.1
通讯作者：
Wagner A.
中科院分区：
文献类型：
--
作者：
Shizuma T.;Iwamoto N.;Makinaga A.;Massarczyk R.;Schwengner R.;Beyer R.;Bemmerer D.;Dietz M.;Junghans A.;Kogler T.;Ludwig F.;Reinicke S.;Schulz S.;Urlas S.;Wagner A.
的偶极强度分布的研究通过核共振荧光实验使用韧致辐射产生的电子束在动能为10.5 MeV的线性加速器ELBE。我们确定了88个共振激发态，能量从3.7到8.2 MeV。测量射线谱的分析包括在高能量的准连续体的水平。用蒙特卡罗方法模拟了射线级联，得到了非弹性跃迁的强度和基态跃迁的分支比。提取的光吸收截面显示增强的偶极强度在激发能量约5.5和7 MeV，这可能与一个pygmy偶极共振。本文结合文献资料，对统计计算程序CCONE的输入参数进行了限定，导出了不稳定核的中子俘获截面。
The dipole strength distribution ofwas investigated via a nuclear resonance fluorescence experiment using bremsstrahlung produced with an electron beam at a kinetic energy of 10.5 MeV at the linear accelerator ELBE. We identified 88 states resonantly excited at energies from 3.7 to 8.2 MeV. The analysis of the measured-ray spectra includes the quasicontinuum of levels at high energy. Monte Carlo simulation of-ray cascades were performed to obtain the intensities of inelastic transitions and branching ratios of the ground-state transitions. The extracted photoabsorption cross section shows enhanced dipole strength at the excitation energies around 5.5 and 7 MeV, which may related to a pygmy dipole resonance. The presentdata combined withdata from the literature were used for confining input parameters of the statistical calculation code CCONE to derive the neutron-capture cross section of the unstablenucleus.