Differential cross section measurements of 27Al(p,p/γ)27Al and 27Al(p,αγ)24Mg reactions in the energy range of 1.6–3.0 MeV

Abstract

In this work measurement of differential cross sections of 27Al(p,p/γ)27Al (Eγ=844, 1014keV) and 27Al(p,αγ)24Mg (Eγ=1369keV) nuclear reactions in the proton energy range of 1.6–3.0MeV are described and the measured values are presented. Thin Al target was prepared by evaporating a 26μg/cm2 Al onto a 129μg/cm2 self-supporting Ag film. The gamma-rays and backscattered protons were detected simultaneously. The gamma-rays and protons were collected by an HPGe detector placed at an angle of 90° with respect to beam direction and an ion implanted Si detector placed at a scattering angle of 165°, respectively. In this experimental setup the great advantage is that differential cross sections could be independent on absolute values of the collected beam charge. The overall systematic uncertainty of cross sections was estimated to be ±9% while statistical errors were less than ±5%.