Associated gamma radiation in interaction of 14.9Â MeV neutrons with natural silicon

The associated gamma radiation in the interaction of 14.9 MeV neutrons and a natural silicon sample is investigated with the total gamma radiation measurement technique (TGRM). According to the systematic knowledge of 14.9 MeV neutron-induced 28,29,30Si(n,xγ) reactions, 50 prompt gamma lines from (n,n′γ), (n,2nγ), (n,npγ), (n,dγ), (n,pγ), (n,αγ), and (n,nαγ) reactions of 28Si, 29Si, and 30Si and one delayed gamma line from 28Si(n,p)28Al(β−)28Si⁎(γ) (f1/2=2.24 m) process, and nine final nuclei were determined, and 54 possible transitions are designated. Differential elemental production cross-sections of 40 gamma lines at 40°, 55°, 90°, 125°, and 140° are determined. Using relative differential production cross-sections, accurate integral isotopic cross-sections of the 28Si(n,p)28Al reaction were determined, and partial integral isotopic cross-sections of some reaction channels were also estimated. The present results are in good agreement with some recent experimental and evaluated results. Comparison between present experimental results and the model calculations shows that effect of isospin conservation is maybe important for associated gamma radiation in alpha and proton emission processes.