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Energy levels of N14 from N15(He3,α)N14

Clayton, Donald D. (1962) Energy levels of N14 from N15(He3,α)N14. Physical Review, 128 (5). pp. 2254-2261. ISSN 0031-899X. doi:10.1103/PhysRev.128.2254.

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The energy level scheme of N14 in the 4-8 MeV range of excitation has been examined by measuring the alpha-particle spectrum from the reaction N15(He3, α)N14*. States are observed at N14 excitations of 3.95, 4.91, 5.113±0.008, 5.691±0.008, 5.832±0.008, 6.048±0.012, 6.224±0.012, 6.436±0.012, 7.032±0.010, 7.97, and 8.06 MeV. Unobserved are the now doubtful states reported near 6.70, 7.40, and 7.60 MeV in N14. The implications of a possible state near 7.60 on the C12/C13 abundance ratio are discussed and it is concluded that observed isotope abundance ratios are consistent with the finding of this experiment; that is, that such a level does not exist. Angular distributions are presented which show the evidence of different reaction mechanisms to different final states. The reaction N14(He3, α)N13* also produced resolvable alpha-particle groups to states in N13 with excitations of 6.38, 6.91, 7.1 6±0.008, and 7.388±0.008 MeV.

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Additional Information:©1962 The American Physical Society. Received 16 July 1962. Supported in part by the joint program of the Office of Naval Research and the U.S. Atomic Energy Commission. This paper presents results of one phase of research carried out at the California Institute of Technology under Contract NASW-6 (WO 98001) sponsored by the National Aeronautics and Space Administration. The author would like to thank Professor W. A. Fowler for suggesting this experiment and Dr. D. F. Hebbard for providing the targets.
Issue or Number:5
Record Number:CaltechAUTHORS:CLApr62
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6001
Deposited By: Tony Diaz
Deposited On:13 Nov 2006
Last Modified:08 Nov 2021 20:30

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