三轴性对重核中子和γ射线发射和吸收的影响
Impact of Triaxiality on the Emission and Absorption of Neutrons and Gamma Rays in Heavy Nuclei
摘要：
对于许多自旋为0的靶核，中子俘获测量产生关于中子分离能处的能级密度的信息。此外，平均光子宽度已确定从捕获数据以及麦克斯韦平均截面的能量范围内的未解决的共振。因此，它是具有挑战性的使用这个数据集的现象学处方的辐射过程的预测测试。各自计算的一个重要组成部分是光子强度函数的参数化，提出了使用一个适合巨偶极共振形状的基础上，理论上确定的基态变形，包括三轴。偏离球面和轴对称也影响水平密度，建议使用一个组合参数化，水平密度和光子强度。给出的公式很好地描述了72 <A <244的124个核的低自旋俘获数据，当考虑到有关核的基态形状的预定信息时，只需要调整很少的全局参数。
英文摘要：
For many spin-0 target nuclei neutron capture measurements yield information on level densities at the neutron separation energy. Also the average photon width has been determined from capture data as well as Maxwellian average cross sections for the energy range of unresolved resonances. Thus it is challenging to use this data set for a test of phenomenological prescriptions for the prediction of radiative processes. An important ingredient for respective calculations is the photon strength function for which a parameterization was proposed using a fit to giant dipole resonance shapes on the basis of theoretically determined ground state deformations including triaxiality. Deviations from spherical and axial symmetry also influence level densities and it is suggested to use a combined parameterization for both, level density and photon strength. The formulae presented give a good description of the data for low spin capture into 124 nuclei with 72<A<244 and only very few global parameters have to be adjusted when the predetermined information on ground state shapes of the nuclei involved is accounted for.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
