New formulas for the (−2) moment of the photoabsorption cross section, σ−2
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Date
2015
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Two new formulas for the (−2) moment of the photoabsorption cross section, σ−2, have been determined,
respectively, from the 1988 photoneutron evaluation of Dietrich and Berman and a mass-dependent symmetry
energy coefficient, asym(A). The data for A 50 follow, with a RMS deviation of 6%, the power law σ−2 =
2.4A5/3 μb/MeV, which is in agreement with Migdal’s calculation of σ−2 = 2.25A5/3 μb/MeV based on the
hydrodynamic model and the σ−2 sum rule. The additional inclusion of asym(A) provides a deeper insight into
the nuclear polarization of A 10 nuclei.
Description
Keywords
Physics, Nuclear polarization, Energy
Citation
Orce, N. (2015). New formulas for the (−2) moment of the photoabsorption cross section, σ−2. Physical Review C, 91 (6). 10.1103/PhysRevC.91.064602