Measurement of the Cross Sections of Gamma Rays Produced in the Inelastic Interaction of 14.2 Mev Neutron With Fe, Ni, Cu, Pb and Bi

Gamma ray production in inelastic scattering of neutrons produced by cosmic muons in $^{56}$Fe

“…The solid squares denote results of relative intensities of gamma lines obtained in the standard neutron beam experiments. Data for 6.3 MeV and 7.3 MeV neutrons were published by Lachkar et al [14] and 14.2 MeV data are due to Xiamin et al [15]. Our result acquired by the use of uncovered californium source is also given in Fig.…”

“…Despite 56 Fe(n, n ′ γ) nuclear reaction being wellexplored, few publications [14,15] report on relative intensities of gamma lines induced by INS on 56 Fe nuclei. Pre-World War II iron is widely used as a passive shield and 846.8 keV gamma line, induced by inelastic scattering of neutrons produced by cosmic muons, is a well-known feature in background spectra [16].…”

“…Reliable experimental studies [8,11] of cross sections for 56 Fe(n, n ′ γ) reaction have indicated that detected intensities of gamma lines depend on incident neutron energy, and it is to be expected that the same holds for relative intensities. Indeed, for incident neutron energies between 6.3 MeV and 14.2 MeV, relative intensity of 1238.3 keV gamma line changes by almost 80% [14,15]. There are several muon-stimulated mechanisms of neutron production with significant contributions to the background [17]: muon capture, muon-induced spallation reactions, muon-induced hadrons cascades, and pho-tonuclear reactions (high energy photons from a muoninduced electromagnetic cascade).…”

“…FIG.2: Relative intensities of gamma lines detected both in the background spectra and the spectra measured by the use of 252 Cf source. Results of pertinent gamma transitions obtained in neutron beam measurements at 6.3 MeV, 7.3 MeV, and 14.2 MeV[14,15] are shown in solid squares (see text for details).…”