On the Reaction 23Na(p,g)24Mg and the Energy Levels of 24Mg

Abstract

The energies of at least 20 ?-rays emitted from the 302 kV resonance level of 23Na(p,?)24Mg have been measured with sodium iodide crystals employed as (a) single crystal spectrometer, (b) scintillation pair spectrometer, (c) "cascade" spectrometer A tentative decay scheme involving levels at 1· 38, 4· 25, 5· 3, 5·8 or 6·2, 7·73, 8·57, 10·60,11·23,11·62, and 12·03 MeV is proposed for 24Mg. The effect of isotopic spin on the transition probabilities is discussed and some spin and parity assignments made. The resonance concerned has been determined as being at 302·2±0·6 kV, and is believed to be less than 50 V wide.