Energy levels of /sup 162/Er through the /sup 165/Ho(p,4n gamma )/sup 162/Er reaction

The energy levels of the nucleus /sup 162/Er have been investigated by standard on-line gamma -ray spectroscopic methods using the /sup 165/Ho(p,4n gamma )/sup 162/Er reaction. Various rotational bands have been excited up to high spins; the ground-state band up to 16/sup +/; the gamma -band up to 11/sup +/ and maybe 12/sup +/; the odd-spin members of the negative-parity octupole band up to 13/sup -/; and a new band, with levels of spins 4, 6, 8, 10 and 12, which could be the even-spin part of the negative-parity octupole band. The results are compared with various theoretical models. The absolute cross sections for the /sup 165/Ho(p,/b x/n)/sup 166-x/Er reactions between /b E //sub p/=30 and 51 MeV have also been measured for /b x/=2 to 6.Anglai

Experimental evidence for low-spin members of `upper' bands in /sup 156/Dy [using /sup 159/Tb(p,4n)/sup 156/Dy]

Study of the energy levels of /sup 156/Dy through the /sup 159/Tb(/b p/,4/b n/)/sup 156/Dy reaction has revealed the existence of six states with excitation energies between 1.8 and 2.8 MeV and spins between 6 and 12. Some of them can tentatively be assigned as low-spin members of `upper' bands which are thought to be responsible for the backbending phenomenon experimentally observed in the ground-state of beta -vibrational bands of this nucleus. Others could be levels of a negative-parity octupole band.Anglai

Formation and decay of hot nuclei in the 64^{64}Zn+nat^{nat}Ti and 36^{36}Ar+27^{27}Al reactions

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