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Examination of the low-energy enhancement of the γ-ray strength function of Fe56
- Jones, MD;
- Macchiavelli, AO;
- Wiedeking, M;
- Bernstein, LA;
- Crawford, HL;
- Campbell, CM;
- Clark, RM;
- Cromaz, M;
- Fallon, P;
- Lee, IY;
- Salathe, M;
- Wiens, A;
- Ayangeakaa, AD;
- Bleuel, DL;
- Bottoni, S;
- Carpenter, MP;
- Davids, HM;
- Elson, J;
- Görgen, A;
- Guttormsen, M;
- Janssens, RVF;
- Kinnison, JE;
- Kirsch, L;
- Larsen, AC;
- Lauritsen, T;
- Reviol, W;
- Sarantites, DG;
- Siem, S;
- Voinov, AV;
- Zhu, S
- et al.
Published Web Location
https://doi.org/10.1103/physrevc.97.024327Abstract
A model-independent technique was used to determine the γ-ray strength function (γSF) of Fe56 down to γ-ray energies less than 1 MeV for the first time with GRETINA using the (p,p′) reaction at 16 MeV. No difference was observed in the energy dependence of the γSF built on 2+ and 4+ final states, supporting the Brink hypothesis. In addition, angular distribution and polarization measurements were performed. The angular distributions are consistent with dipole radiation. The polarization results show a small bias towards magnetic character in the region of the enhancement.
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