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Published February 1, 1971 | public
Journal Article Open

Mass and half-life of 9C


The mass of 9C has been measured by counting delayed protons near the 7Be(3He,n)9C threshold. The data are consistent with an s-wave threshold at E3He=8980±5 keV, giving a 9C mass excess of 28 907±4 keV, and confirming the reported deviation of the A=9, lowest T=3 /2 quartet from the quadratic mass formula. The half-life of 9C, measured with a multiscaler, is 126.5 ± 2 msec.

Additional Information

©1971 The American Physical Society. Received 9 October 1970. Work supported in part by the National Science Foundation (GP-19887, GP-9114) and the Office of Naval Research [Nonr-220(47)].


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