The reaction 20Ne(p, γ)21Na

Abstract

The decay scheme, the width, and the strength of the Ep = 1169, 1955, and 2138 keV resonances in the reaction 20Ne(p, γ)21Na are reported. The spins of the first two resonances are Jπ = 5/2+ and , 5/2 respectively.

Coincidence and angular correlation measurements at the Ep = 1955 keV resonance yield the excitation energy and spin of the 21Na first excited state: Ex = 338 ± 3 keV and Jπ = 5/2+. The mixing ratio of the 0.34 MeV γ ray de-exciting this level is x = 0.05 ± 0.05.

Measurements of the resonance- and γ-ray energies yield the reaction Q value, Q = 2424±10 keV. The corresponding 21Na mass excess is -2177 ± 10 keV.