Consequences of Neutron-Proton Pairing Correlations for the Rational Motion of the N=Z Nucleus 72Kr

Authors :: Kelsall, N. S.
Wadsworth, R.
Wilson, A. N.
Fallon, P.
Macchiavelli, A. O.
Clark, R. M.
Sarantites, D. G.
Seweryniak, D.
Svensson, C. E.
Vincent, S. M.
Frauendorf, S.
Sheikh, J. A.
Ball, G. C.
Source :: Phys. Rev. C 64 (2001) 024309
Publication Year :: 2001
Abstract: High-spin states in the N = Z nucleus 72Kr were populated using the 40Ca(36Ar,2p2n) reaction at a beam energy of 145 MeV. The yrast band has been observed up to a tentative spin of 20 h. Nonyrast rotational structures have also been observed for the first time. The alignment of g9/2 protons and neutrons in the yrast band is observed to be significantly delayed relative to the heavier even-even Kr isotopes. Exact deformed cranked shell model calculations suggest that this could be due to the combined effect of isovector (T = 1) and isoscalar (T = 0) neutron-proton pairing correlations.

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