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Two proton high-spin excitations and dipole bands in192Hg

Authors :: Le Coz, Y.
Redon, N.
Astier, A.
Béraud, R.
Duffait, R.
Meyer, M.
Hannachi, F.
Bastin, G.
Deloncle, I.
Gall, B.
Kaci, M.
Porquet, M. G.
Schück, C.
Azaiez, F.
Bourgeois, C.
Duprat, J.
Korichi, A.
Perrin, N.
Poffé, N.
Sergolle, H.
Sharpey-Schafer, J. F.
Beausang, C. W.
Gale, S. J.
Joyce, M. J.
Paul, E. S.
Clark, R. M.
Hauschild, K.
Wadsworth, R.
Simpson, J.
Bentley, M. A.
Smith, A. G.
Hübel, H.
Willsau, P.
De France, G.
Ahmad, I.
Carpenter, M.
Henry, R.
Janssens, R. V. F.
Khoo, T. L.
Lauritsen, T.
Source :: Zeitschrift für Physik A Hadrons and Nuclei; June 1994, Vol. 348 Issue: 2 p87-93, 7p
Publication Year :: 1994
Abstract: The<superscript>192</superscript>Hg nucleus was populated in the<superscript>160</superscript>Gd(<superscript>36</superscript>S, 4n) reaction at a beam energy of E=159 MeV. Emitted?-rays were detected with the EUROGAM array comprising 43 Compton-suppressed large volume Ge detectors. The level scheme of<superscript>192</superscript>Hg has been extended up to an excitation energy of E=10.4 MeV and spin I=34 h. Two new structures, made of competing ?I=1 and ?I=2 transitions have been observed and their connexions with the low-lying levels established. Their lowest levels are located at 6.304 MeV and 6.879 MeV excitation energy. The experimental results are compared with mean-field HF+BCS calculations. It is proposed that the new structures originate from deformation-aligned quasi-proton excitations p(i<subscript>13/2</subscript> * h<subscript>9/2</subscript>)<subscript>K=11</subscript> andp (h<subscript>9/2</subscript>)<subscript>K=8</subscript><superscript>2</superscript>, coupled to rotation-aligned quasi-neutron ?(i<subscript>13/2</subscript>)<superscript>n</superscript> and quasi-proton p(h<subscript>11/2</subscript>)<superscript>2</superscript> excitations.