The fine structure at 11.52MeV level in 24Mg obtained by γ resonant absorption method

Abstract

The γ resonant absorption method has been used to determine the parameters of the 11.5MeV level in 24Mg. Two dips were observed beyond our expectations. They are identified as the resonant absorptions caused by the splitting energy levels at 11.52MeV. The energies of the corresponding states are 11519.8±0.4keV and 11520.7±0.4keV with 22.6±3.4eV and 10.0±2.9eV total level widths respectively. The fine structure and the relevant parameters of 11.52MeV state in 24Mg are given for the first time. The potential of the high resolution in the resonant absorption method is clearly demonstrated in present paper.