Nuclear Structure Towards N = 40 60Ca: In-Beam γ-Ray Spectroscopy of 58,60Ti.

Authors :: Gade, A.
Janssens, R. V. F.
Weisshaar, D.
Brown, B. A.
Lunderberg, E.
Albers, M.
Bader, V. M.
Baugher, T.
Bazin, D.
Berryman, J. S.
Campbell, C. M.
Carpenter, M. P.
Chiara, C. J.
Crawford, H. L.
Cromaz, M.
Garg, U.
Hoffman, C. R.
Kondev, F. G.
Langer, C.
Lauritsen, T.
Source :: Physical Review Letters. 3/21/2014, Vol. 112 Issue 11, p112503-1-112503-5. 5p.
Publication Year :: 2014
Abstract: Excited states in the neutron-rich N = 38, 36 nuclei 60Ti and 58Ti were populated in nucleon-removal reactions from 61V projectiles at 90 MeV/nucleon. The γ-ray transitions from such states in these Ti isotopes were detected with the advanced γ-ray tracking array GRETINA and were corrected event by event for large Doppler shifts (v/c∼0.4) using the γ-ray interaction points deduced from online signal decomposition. The new data indicate that a steep decrease in quadrupole collectivity occurs when moving from neutron-rich N = 36, 38 Fe and Cr toward the Ti and Ca isotones. In fact, 58,60Ti provide some of the most neutron-rich benchmarks accessible today for calculations attempting to determine the structure of the potentially doubly magic nucleus 60Ca. [ABSTRACT FROM AUTHOR]