Abstract
The delayed-proton precursors 21Mg and 25Si have been produced by proton bombardment of targets of sodium, magnesium, aluminum, and silicon dioxide in the internal beam of the McGill synchrocyclotron. Half-lives of 118 ± 4 and 225 ± 6 msec respectively were measured, and a spin-parity assignment of (5/2)+ has been made to the ground state of 21Mg. Strong lines in the delayed-proton spectra have been attributed to decay of the expected first T = 3/2 states in 21Na and 25Al, fed by superallowed β transitions from the respective precursors 21Mg and 25Si.
Publisher
Canadian Science Publishing
Subject
General Physics and Astronomy
Cited by
27 articles.
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