(n, p) cross sections of some low Z nuclei for 14.8 MeV neutrons

doi:10.1016/0029-5582(66)90346-4

Nuclear Physics

Volume 83, Issue 1, July 1966, Pages 157-165

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Abstract

The (n, p) cross sections of ¹⁶O, ¹⁹F, ²³Na, ²⁷Al, ²⁸Si, ³⁷Cl, ⁵¹V and ⁵²Cr for 14.8±0.1 MeV neutrons have been measured respectively as 40.1±2.7, 23.3±2.8, 41.8±3.8, 97±10, 222±12, 21.3±2.1, 24.7±2.2 and 82.8±5.8 mb. Sources of systematic errors and the steps taken to control them have been discussed. The results have been compared with calculated values given by Erba et al. and Gardner and Levkovskii.

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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) (f_1/2=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.
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Nuclear Physics

Abstract

References (25)

Nuclear Physics

Phys. Rev.

Bull. Am. Phys. Soc.

Nuclear Physics

Phys. Rev.

Nuclear Physics

UCRL-5226

Nuclear Physics

JETP (Soviet Physics)

Nucleonics

Nucleonics

Nuclear Physics

Revs. Mod. Phys.

Cited by (25)

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

Measurements and statistical model calculations of activation cross sections for <sup>19</sup>F(n,p)<sup>19</sup>O reaction between 13.6 and 14.9 MeV neutron energies

Cross-section measurements for the (n,p) and (n,α) reactions on <sup>23</sup>Na and for the (n,p) reaction on <sup>26</sup>Mg at the neutron energies from 13.6 to 14.9 MeV

Reaction-model calculations of cross sections for neutron-induced reactions on <sup>23</sup>Na

Calibration of Homalite CR-39 plastic track detector for light particle spectrometry and its application in studying the (n, α) and (n, p) reaction on <sup>51</sup>V

On the simultaneous use of a Ge(Li) semiconductor and A NaI(Tl) scintillation detector in neutron activation cross-section measurements