States in the N=28 nucleus 46Ar have been studied by a two-neutron transfer reaction at REX-ISOLDE (CERN). A beam of radioactive 44 at an energy of 2.16~AMeV and a tritium loaded titanium target were used to populate 46 by the t(44,p) two-neutron transfer reaction. Protons emitted from the target were identified in the T-REX silicon detector array. The excitation energies of states in 46 have been reconstructed from the measured angles and energies of recoil protons. Angular distributions for three final states were measured and based on the shape of the differential cross section an excited state at 3695~keV has been identified as Jπ=0+. The angular differential cross section for the population of different states are compared to calculations using a reaction model employing both sequential and direct transfer of two neutrons. Results are compared to shell model calculations using state-of-the-art effective interactions.
@article{arxiv.1604.04014,
title = {Spectroscopy of 46Ar by the (t,p) two-neutron transfer reaction},
author = {K. Nowak and K. Wimmer and S. Hellgartner and D. Mücher and V. Bildstein and J. Diriken and J. Elseviers and L. P. Gaffney and R. Gernhäuser and J. Iwanicki and J. G. Johansen and M. Huyse and J. Konki and T. Kröll R. Krücken and R. Lutter and R. Orlandi and J. Pakarinen and R. Raabe and P. Reiter and T. Roger and G. Schrieder and M. Seidlitz and O. Sorlin and P. Van Duppen and N. Warr and H. De Witte and M. Zielinska},
journal= {arXiv preprint arXiv:1604.04014},
year = {2016}
}