High-sensitivity study of levels in 30Al following β decay of 30Mg
Olaizola, B., Mach, H., Fraile, L. M., Benito, J., Borge, M. J. G., Boutami, R., Butler, P. A., Dlouhy, Z., Fynbo, H. O. U., Hoff, P., Hyldegaard, S., Jeppesen, H. B., Jokinen, A., Jollet, C., Korgul, A., Köster, U., Kröll, Th., Kurcewicz, W., Marechal, F., . . . Yordanov, D. T. (2016). High-sensitivity study of levels in 30Al following β decay of 30Mg. Physical Review C, 94(5), Article 054318. https://doi.org/10.1103/PhysRevC.94.054318
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© the Authors, 2016. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
γ -ray and fast-timing spectroscopy were used to study levels in 30Al populated following the β− decay of 30Mg. Five new transitions and three new levels were located in 30Al. A search was made to identify the third 1+
state expected at an excitation energy of ∼2.5 MeV. Two new levels were found, at 3163.9 and 3362.5 keV, that
are firm candidates for this state. Using the advanced time-delayed (ATD) βγγ (t) method we have measured the
lifetime of the 243.8-keV state to be T1/2 = 15(4) ps, which implies that the 243.8-keV transition is mainly of M1
character. Its fast B(M1; 2+ → 3+) value of 0.10(3) W.u. is in very good agreement with the USD shell-model
prediction of 0.090 W.u. The 1801.5-keV level is the only level observed in this study that could be a candidate
for the second excited 2+ state.
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Except where otherwise noted, this item's license is described as © the Authors, 2016. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.