Particle-γ coincidence experiments were performed at the Oslo Cyclotron Laboratory with the 181Ta(d,X) and 181Ta(3He,X) reactions, to measure the nuclear level densities (NLDs) and γ-ray strength functions (γSFs) of 180,181,182Ta using the Oslo method. The Back-shifted Fermi-Gas, Constant Temperature plus Fermi Gas, and Hartree-Fock-Bogoliubov plus Combinatorial models where used for the absolute normalisations of the experimental NLDs at the neutron separation energies. The NLDs and γSFs are used to calculate the corresponding 181Ta(n,γ) cross sections and these are compared to results from other techniques. The energy region of the scissors resonance strength is investigated and from the data and comparison to prior work it is concluded that the scissors strength splits into two distinct parts. This splitting may allow for the determination of triaxiality and a γ deformation of 14.9∘±1.8∘ was determined for 181Ta.
@article{arxiv.1901.02682,
title = {Nuclear level densities and gamma-ray strength functions of $^{180,181,182}$Ta},
author = {C. P. Brits and K. L. Malatji and M. Wiedeking and B. V. Kheswa and S. Goriely and F. L. Bello Garrote and D. L. Bleuel and F. Giacoppo and A. Gorgen and M. Guttormsen and K. Hadynska-Klek and T. W. Hagen and S. Hilaire and V. W. Ingeberg and H. Jui and M. Klintefjord and A. C. Larsen and S. N. T. Majola and P. Papka and S. Peru and B. Qi and T. Renstrom and S. J. Rose and E. Sahin and S. Siem and G. M. Tveten and F. Zeiser},
journal= {arXiv preprint arXiv:1901.02682},
year = {2019}
}