Elsevier

Nuclear Physics A

Volume 161, Issue 1, 25 January 1971, Pages 241-251
Nuclear Physics A

Lifetimes and gamma transitions in 19O

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Abstract

Gamma transitions have been observed in 19O and energies and branching ratios determined, following the 2H(18O, pγ)19O, and 3H(17O,pγ)19O reactions. The lifetime of the 1470 keV second excited state in 19O has been measured from the Doppler line shape of its decay radiation to be 1.80 ± 0.29 ps, that of the 2774 keV state to be 70 ± 26 fs; a lower limit of 1.0 ps has been set on the lifetimes of the 2367, 3066 and 3150 keV states. The lifetime of the 19O 1470 keV level is in good agreement with the shell model, while that for the 19O 2774 keV level is not consistent with 92+ usually assigned to it.

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While on leave of absence from Chalk River Nuclear Laboratories, Chalk River, Canada. Present address: Weizmann Institute, Rehovot, Israel.

††

Present address: Faculté des Sciences de l'Université de Bordeaux, Gradignan, France.

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