T=1 positive parity states in Si28 and P28

C. Miehé, A. Huck, G. Klotz, and G. Walter
Phys. Rev. C 15, 30 – Published 1 January 1977
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Abstract

The Al27(p, γ)Si28, Al27(d, nγ)Si28, Mg26(He3, nγ)Si28, and Si28(p, nγ)P28 reactions have been used to investigate the T=1 states of Si28 and P28. The γ decay of the levels at 10.27 and 11.43 MeV (doublet) in Si28 and of seven levels in P28 has been studied. Limits on lifetimes for the Si28 levels and for the states at 1.13 and 2.10 MeV in P28 were determined using the Doppler shift attenuation method. From six isobaric triplets identified in A=28 nuclei, Coulomb displacement energies, isovector, and isotensor Coulomb energies have been deduced. Excitation energies of the members of the multiplets are compared with theoretical values obtained from Coulomb displacement energy calculations, using shell model wave functions with particles in the 1d52, 2s12, and 1d32 subshells.

NUCLEAR REACTIONS Al27(d, nγ), E=5.8 MeV; Mg26(He3, nγ), E=6.0 MeV; measured Eγ, Doppler shift attenuation, nγ coin. Al27(p, γ), E=1439 keV; measured Eγ. Si28 deduced levels, τm, γ branching. Si28(p, nγ), E=23 MeV; measured Eγ, Doppler shift attenuation, nγ coin. P28 deduced levels, τm, γ branching, analog states. Natural and enriched targets.

  • Received 3 August 1976

DOI:https://doi.org/10.1103/PhysRevC.15.30

©1977 American Physical Society

Authors & Affiliations

C. Miehé, A. Huck, G. Klotz, and G. Walter

  • Centre de Recherches Nucléaires, 67037 Strasbourg Cedex, France

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Vol. 15, Iss. 1 — January 1977

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