Spectroscopic Factors in the Nilsson Model

Wednesday 25 April 2018, 10.30AM

Speaker(s): Dr Augusto Macchiavelli

Based on the fact that intruder deformed configurations dominate the low-lying structure of nuclei within the Islands of Inversion, and inspired by the formalism developed for studies of single-nucleon transfer reactions in deformed nuclei [1], we have analyzed spectroscopic factor data in the Islands of Inversion at N=8 and 20, in the rotational strong-coupling limit.

We will present results for 10,11,12Be and 32,33Mg [2,3], in good agreement with the experimental data, as well as predictions for other reactions and regions.

Within the same approach, we will also discuss a recent measurement [4] of the 18F(d,p)19F reaction on both the ground and isomeric states in 18F. For the latter the rotation-aligned limit [5] has to be considered.

The cases above show that the Nilsson model continues to provide an intuitive and simple framework to obtain important structure information from direct reactions, complementary to large-scale shell model and ab-initio calculations.

Work supported by the U.S. Department of Energy, Office of Nuclear Physics, under contract no DE-AC02-05CH11231.

[1] B. Elbek and P. Tjom, Advances in Nucl. Phys. Vol 3, 259 (1969). [2] A. O. Macchiavelli, et al. Phys. Rev. C97, 011302 (R) (2018).
[3] A. O. Macchiavelli,
et al. Phys. Rev. C96, 054302 (2017).
[4] D. Santiago,
et al. Phys. Rev. Lett., in press (2018) .

[5] F.S. Stephens, R.M. Diamond, and S.G. Nilsson, Phys. Lett. B44 429 (1973). 

Location: P/T111