M1 radiation widths in Al27

R. Vodhanel, R. Moreh, W. C. Sellyey, M. K. Brussel, and B. H. Wildenthal
Phys. Rev. C 35, 921 – Published 1 March 1987
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Abstract

Nuclear resonance fluorescence from energy levels in Al27 lying between 2 and 10 MeV excitation energy has been measured with bremsstrahlung beams of end-point energies of 7.66 and 10.37 MeV. Values of gΓ0 and gΓ0Γγ/Γ for 39 levels below 10 MeV were obtained from scattering cross section and self-absorption measurements. The measurements give an upper bound of total B(M1↑) below 7.7 MeV excitation which is about 25% less than the predictions of a large-scale shell model calculation based on the free-nucleon M1 operator. The same shell model wave functions combined with an effective M1 operator based on moments and transitions between low-lying states is in good agreement with the present experimental results.

  • Received 25 August 1986

DOI:https://doi.org/10.1103/PhysRevC.35.921

©1987 American Physical Society

Authors & Affiliations

R. Vodhanel, R. Moreh, W. C. Sellyey, and M. K. Brussel

  • Nuclear Physics Laboratory, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820

B. H. Wildenthal

  • Physics Department, Drexel University, Philadelphia, Pennsylvania 19104

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Issue

Vol. 35, Iss. 3 — March 1987

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