- Zeiser, F;
- Tveten, GM;
- Potel, G;
- Larsen, AC;
- Guttormsen, M;
- Laplace, TA;
- Siem, S;
- Bleuel, DL;
- Goldblum, BL;
- Bernstein, LA;
- Garrote, FL Bello;
- Campo, L Crespo;
- Eriksen, TK;
- Görgen, A;
- Hadynska-Klek, K;
- Ingeberg, VW;
- Midtbø, JE;
- Sahin, E;
- Tornyi, T;
- Voinov, A;
- Wiedeking, M;
- Wilson, J
The Oslo method has been applied to particle-γ coincidences following the Pu239(d,p) reaction to obtain the nuclear level density (NLD) and γ-ray strength function (γSF) of Pu240. The experiment was conducted with a 12 MeV deuteron beam at the Oslo Cyclotron Laboratory. The low spin transfer of this reaction leads to a spin-parity mismatch between populated and intrinsic levels. This is a challenge for the Oslo method as it can have a significant impact on the extracted NLD and γSF. We have developed an iterative approach to ensure consistent results even for cases with a large spin-parity mismatch, in which we couple Green's function transfer calculations of the spin-parity dependent population cross-section to the nuclear decay code rainier. The resulting γSF shows a pronounced enhancement between 2-4 MeV that is consistent with the location of the low-energy orbital M1 scissors mode.