T=0 pairing correlations and band crossing phenomena in N=Z nuclei

de Angelis, G.; Fahlander, C.; Gadea, A.; Farnea, E.; Gelletly, W.; Aprahamian, A.; Axelsson, A.; Bazzacco, D.; Becker, F.; Bizzeti, P.G.

doi:10.1016/S0375-9474(97)00781-1

T=0 pairing correlations and band crossing phenomena in N=Z nuclei

1998

8 pages

Published in:

Nucl.Phys.A 630 (1998) 426-433

Published: 1998

DOI:

10.1016/S0375-9474(97)00781-1

View in:

Nuclear Science References

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Abstract: (Elsevier)

The structure of the N=Z nuclei 60 Zn, 62 Ga, 64 Ge and 72 Kr has been investigated at GASP spectrometer through the 32 S + 40 Ca and 40 Ca + 40 Ca reactions at 140 and 160 MeV, respectively, using reaction channel selection with the ISIS Si-ball. The high spin states of such nuclei have been investigated searching for the four quasi-particle g 9 2 alignment. TRS calculations have been performed for the N=36, 38 and 40 Kr isotopes. In the case of 72 Kr the four quasi-particle g 9 2 alignment is observed to be significantly delayed in rotational frequency with respect to the heavier Kr isotopes. Such a delay contradicts the predictions of mean field calculations and may be interpreted as the first sign of additional correlations in the T=0 pairing channel.

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