Abstract
A method to extract simultaneously level densities and γ-ray transmission coefficients has for the first time been tested on light nuclei utilizing the 28Si(3He,αγ)27Si and 28Si(3He,3He′γ)28Si reactions. The extracted level densities for 27Si and 28Si are consistent with the level densities obtained by counting known levels in the respective nuclei. The extracted γ-ray strength in 28Si agrees well with the known γ-decay properties of this nucleus. Typical nuclear temperatures are found to be T ∼ 2.4 MeV at around 7 MeV excitation energy. The entropy gap between nuclei with mass number A and A ± 1 is measured to be δS ∼ 1.0 kB, which indicates an energy spacing between single-particle orbitals comparable with typical nuclear temperatures.
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