Elsevier

Nuclear Physics A

Volume 460, Issue 2, 1 December 1986, Pages 181-200
Nuclear Physics A

Strong M2 transitions

https://doi.org/10.1016/0375-9474(86)90123-5Get rights and content

Abstract

The recommended upper limit (RUL) for isospin-allowed M2 γ-ray transition strengths is largely determined by the strongest observed M2 transitions. In order to check this M2 RUL the strengths of the five strongest reported primary M2 transitions have been remeasured via (p, γ) reactions. The results are: 14N, Ex = 8.91 → 0 MeV: 2.2 ± 0.3 W.u.; 16O, Ex = 12.97 → 0 MeV: 1.0 ± 0.3 W.u.; 16O, Ex = 12.53 → 0 MeV: 1.12 ± 0.17 W.u.; 21Na, Ex = 2.80 → 0.33 MeV: <0.4 W.u.; 32S, Ex = 10.08 → 0 MeV: 0.93 ± 0.13 W.u. Although all but one of these new M2 strengths are lower than the previously reported values, the M2 RUL of 3 W.u. for nuclei with A = 6–44 cannot be reduced due to the strong transition in 14N.

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