40Ar(n,p)40Cl reaction cross section

Abstract

The activation technique was used to measure the cross section for the reaction 40 Ar(n,p) 40 Cl in 0.5 MeV energy steps in the neutron energy range between 9 and 15 MeV. These data are important for estimating background contributions in neutrinoless double-beta decay and dark matter searches, as well as in argon-based large neutrino detectors. The data are compared to evaluations and theoretical predictions.

How to suppress the backscattering of conduction electrons?

“…Therefore, the system "electron + strong electromagnetic field" should be considered as a bound electron-field object which was called "electron dressed by field" (dressed electron) [1,2]. In atomic and molecular systems, the interaction between electrons and a dressing field results in various phenomena, including both the photon-induced modification of electron energy spectrum (the dynamic Stark effect) [3][4][5][6][7] and the photon-assisted scattering of electrons by atoms and molecules [8][9][10][11][12]. In condensed matters, research activity was focused on the dynamic Stark effect [13][14][15][16][17][18][19][20][21][22][23][24][25][26] and the photon-assisted nonstationary quantum transport through potential barriers [27][28][29][30].…”

Recent cross-section measurements of neutron-induced reactions of importance for background estimates in0νββsearches

“…In continuation of our previous work on the reactions 40 Ar(n,p) 40 Cl [18], 40 Ar(n,γ ) 41 Ar [19], 74 Ge(n,γ ) 75 Ge [20], 76 Ge(n,γ ) 77 Ge [20], 76 Ge(n,p) 76 Ga [6], 76 Ge(n,2n) 75 Ge [21], 136 Xe(n,γ ) 137 Xe [22], and 136 Xe(n,2n) 135 Xe [23], we present data and their comparison to previously existing data and evaluations and model calculations for the reactions 76 Ge(n,2n) 75 Ge, 76 Ge(n,n γ ) 76 Ge, 136 Xe(n,n γ ) 136 …”

Benefits of MeV-scale reconstruction capabilities in large liquid argon time projection chambers

“…Recently-measured neutron interaction cross-sections on 40 Ar in the "2-40 MeV energy regime [40,41], shown in Figure 7, are dominated by γ-producing inelastic scattering and by neutron-producing reactions, which will in turn generate γ-producing inelastic scattering. These cross-sections correspond to effective neutron interaction lengths on the order of tens of cm.…”

“…Data retrieved from [42] for Refs. [40,41]. Bottom: Geant4-reported true γ-ray energies created via inelastic scattering of 10 MeV neutrons in LAr.…”