Neutron-proton capture total cross section between 38 and 73 MeV

Abstract

Summary form only given, substantially as follows. The authors have measured the n-p capture total cross section at 38, 43, 48, 53, 58, 63 and 73 MeV; this energy range overlaps the questioned region of the deuteron photodisintegration. Neutrons are produced by the /sup 7/Li(p,n) reaction at 0 degrees . Deuterons from capture processes are emitted in a narrow forward cone (less than +/-7 degrees ); the time of flight between two NE102 scintillators, as well as Delta E and E signals from those scintillators, are used to select deuterons. Protons from n-p elastic scattering at 3 degrees lab are also detected. The capture total cross section is thus normalized to the well-known n-p differential cross section at backward c.m. angles.