2003/12/03 by P. Koehler, P. E. Koehler, Yu. M. Gledenov +3
Engineering · Physics and Astronomy · #Astronomical and nuclear sciences #Atomic physics #Imaging phantom #Nuclear magnetic resonance #Nuclear physics research studies #Nuclear reactor physics and engineering #Optics #Physics #Resonance (particle physics) #astro-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.69.015803
published as Phys.Rev. C69 (2004) 015803 · Accepted for publication in Physical Review C
arxiv created 2003/12/03 · openalex publication_date 2004/01/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have measured the 147Sm(n,\ensuremathα) cross section from 3\phantom\rule0.3em0exeV to 500\phantom\rule0.3em0exkeV and performed an R-matrix analysis in the resolved region (En<700\phantom\rule0.3em0exeV) to extract \ensuremathα widths for 104 resonances. We computed strength functions from these resonance parameters and compared them to transmission coefficients calculated using optical model potentials similar to those employed as inputs to statistical model calculations. The statistical model often is used to predict cross sections and astrophysical reaction rates. Comparing resonance parameters rather than cross sections allows more direct tests of potentials used in the model and hence should offer greater insight into possible improvements. In particular, an improved \ensuremathα+nucleus potential is needed for applications in nuclear astrophysics. In addition to providing a more direct test of the \ensuremathα+nucleus potential, the \ensuremathα-width distributions show indications of nonstatistical effects.