Cross-section measurements of neutron-induced reactions on GaAs using monoenergetic beams from 7.5 to 15 MeV

Abstract

Cross-section measurements for neutron induced reactions on GaAs have been carried out at twelve different neutron energies from 7.5 to 15 MeV using the activation technique. The monoenergetic neutron beams were produced via the 2 H(d, n) 3 He reaction. GaAs samples were activated along with Au and Al monitor foils for determining the incident neutron flux. The induced activities of the reaction products were measured using high-resolution γ-ray spectroscopy. Cross-section for five reaction channels viz., 69 Ga(n, 2n) 68 Ga, 69 Ga(n, p) 69 Zn m , 71 Ga(n, p) 71 Zn m , 75 As(n, 2n) 74 As and 75 As(n, p) 75 Ge, are reported. The results are compared with the previous measurements and available data evaluations. Statistical-model calculations, based on the Hauser-Feshbach formalism, have been carried out using the TALYS and the COH3 codes and compared with the experimental results.

Investigation of (n,2n) cross sections for some structural materials at 14.0 MeV

“…The relative efficiency data with and without absorber for a particular target detector geometry inclusive of all due to self scattering, self absorption and geometry solid angle for a simulated cylindrical target was used to determine the cross sections. The cross section measured in the present work and by others [4][5][6][7][8][9][10][11][12][13] with the same experimental method are in agreement within about 2-15 %.…”

“…The previous measurements of (n,2n) cross sections around 14.0 MeV neutron energy on these isotopes show a 7-34% spread [4][5][6][7][8][9][10][11][12][13] , so further measurements are needed.…”

Accurate U238 ( n, 2n ) UKrishichayan1, Bhike2, Tornow3 et al. 2017Phys. Rev. CSelf Cite6020View full textAdd to dashboardCite

“…The associated half-life times are in very good agreement with the literature values from the National Nuclear Data Center database [28]. The incident neutron flux and the reaction cross section for 238 U(n,2n) 237 U was calculated from the well-known activation formula [38][39][40]…”

Evaluation of the 1077 keV γ-ray emission probability from 68 Ga decay

“…1 and 2). Raut's [2] measurements are lower than all other measurements. It is noted that the experimen-tal measurements for the 75 As(n,2n) 74 As reaction show the same behaviour (see Fig.…”