To improve the effective interactions in the pf shell, it is important to measure the single particle- and hole- states near the N=28 shell gap. In this paper, the neutron spectroscopic factors of hole-states from the unstable neutron-rich 45Ar (Z=18, N=27) nucleus have been studied using 1H(46Ar, 2H)45Ar transfer reaction in inverse kinematics. Comparison of our results with the particle-states of 45Ar produced in 2H(44Ar, H)45Ar reaction shows that the two reactions populate states with different angular momentum. Using the angular distributions, we are able to confirm the spin assignments of four low-lying states of 45Ar. These are the ground state (f7/2), the first-excited (p3/2), the s1/2 and the d3/2 states. While large basis shell model predictions describe spectroscopic properties of the ground and p3/2 states very well, they fail to describe the s1/2 and d3/2 hole-states.
@article{arxiv.1308.3677,
title = {Neutron-hole states in 45Ar from p(46Ar,d)45Ar reactions},
author = {F. Lu and Jenny Lee and M. B. Tsang and D. Bazin and D. Coupland and V. Henzl and D. Henzlova and M. Kilburn and W. G. Lynch and A. M. Rogers and A. Sanetullaev and Z. Y. Sun and M. Youngs and R. J. Charity and L. G. Sobotka and M. Famiano and S. Hudan and M. Horoi and Y. L. Ye},
journal= {arXiv preprint arXiv:1308.3677},
year = {2013}
}