Spectroscopy of Ne25 and the N=16 magic number

The low-energy level structure of Ne-25 has been investigated following the beta(-) decay of F-25. Beta-delayed gamma spectroscopy revealed new gamma transitions in Ne-25 at 1234, 1622, and 2090 keV. The new transitions were placed in the level scheme of Ne-25 in accordance with the observed gamma-gamma coincidences. The total beta(-) decay strength has been accounted for. The spins and parities of the first two excited states could be ascertained by comparison with a shell model calculation and the literature. The half-life for F-25 decay was also remeasured using fragment-beta-gamma correlations, revealing a value of 90 +/- 9 ms. Comparison with shell model calculations are indicative of a wider N = 16 gap as compared to the stable nuclei.