Investigation of the Reaction Ar⁴⁰(p,γ)K⁴¹

Abstract

The Ar⁴⁰(p,γ)K⁴¹ reaction has been studied in the range of proton energies from 750 Kev to 1450 Kev using a thin Ar⁴⁰ target prepared by a method of electromagnetic mass separation. 66 excited levels in K⁴¹ were observed. Gamma-rays from the reaction Ar⁴⁰(p,γ)K⁴¹ have been studied at the six resonances occurring at E_p=1091, 1106, 1112, 1123, 1311 and 1391 Kev by the use of a NaI crystal scintillation spectrometer. In the nucleus K⁴¹, levels at 0.98, 1.29, 1.58 and 8.5∼9.2 Mev were observed. Spins of 1.58, 8.864 and 8.879 Mev levels were assigned to be 3/2, 5/2 and 3/2, respectively from the angular distributions of gamma-rays.