Spectroscopy of 153Gd and 157Gd using the (p,dɣ) reaction.

Authors :: Ross, T. J.
Hughes, R. O.
Allmond, J. M.
Beausang, C. W.
Angell, C. T.
Basunia, M. S.
Bleuel, D. L.
Burke, J. T.
Casperson, R. J.
Escher, J. E.
Fallon, P.
Hatarik, R.
Munson, J.
Paschalis, S.
Petri, M.
Phair, L. W.
Ressler, J. J.
Scielzo, N. D.
Source :: Physical Review C: Nuclear Physics. Oct2014, Vol. 90 Issue 4, p1-12. 12p.
Publication Year :: 2014
Abstract: Low-spin single quasineutron levels in 153Gd and 157Gd have been studied following the 154Gd(p,d-ɣ)153Gd and 158Gd(p,d-ɣ)157Gd reactions. A combined Si telescope and high-purity germanium array was utilized, allowing d-ɣ and d-ɣ-ɣ coincidence measurements. Almost all of the established low-excitation-energy, low-spin structures were confirmed in both 153Gd and 157Gd. Several new levels and numerous new ɣ rays are observed in both nuclei, particularly for Ex≥1 MeV. Residual effects of a neutron subshell closure at N=64 are observed in the form of a large excitation energy gap in the single quasineutron level schemes. [ABSTRACT FROM AUTHOR]