Elsevier

Nuclear Physics

Volume 85, Issue 2, September 1966, Pages 461-475
Nuclear Physics

Lebensdauermessungen in 14N, 15N und 22Ne

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Abstract

The Doppler shift attenuation method was used to measure the lifetimes of some excited states in 14N, 15N and 22Ne. The states of 14N were produced by the reaction 12C(3He, p)14N. The mean lifetimes of the Jπ = 0+ state at 2.31 MeV and Jπ = 1+ state at 3.95 MeV excitation were found to be τ = 0.083±0.019 ps and τ ≦ 0.087 ps, respectively. The 7.16 MeV and 7.57 MeV states in 15N, populated by the reaction 13C(3He, p)15N, were found to have mean lifetimes τ = 0.115±0.025 ps and τ = 0.15±0.05 ps, respectively. The first excited state of 22Ne was studied by the reaction 19Fe(4He, p)22Ne. The mean lifetime of this state is τ = 8±3 ps. The results obtained are compared with predictions of nuclear models.

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    Work supported by the Bundesministerium für Wissenschaftliche Forschung und Deutsche Forschungsgemeinschaft.

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