Two proton high spin excitations and dipole bands in 192hg

Le Coz, Y. and Astier, A. and Béraud, R. and Duffait, R. and Meyer, M. and Redon, N. and Bastin, G. and Deloncle, I. and Gall, B. and Hannachi, F. and Kaci, M. and Porquet, M.G. and Schiick, C. and Azaiez, F. and Bourgeois, C. and Duprat, J. and Korichi, A. and Perrin, N. and Poffe, N. and Sergolle, H. and Beausang, C.W. and Gale, S.J. and Joyce, M.J. and Paul, E.S. and Sharpey-Schafer, J.F. and Clark, R.M. and Hauschild, K. and Wadsworth, R. and Simpson, J. and Bentley, M.A. and Smith, G. and Hiibel, H. and Willsau, P. and De France, G. and Ahmad, I. and Carpenter, M. and Henry, R. and Janssens, R.V.F. and Khoo, T.L. and Lauritsen, T. (1995) Two proton high spin excitations and dipole bands in 192hg. Physica Scripta, 1995 (T56). pp. 234-235. ISSN 0031-8949

Abstract

The 192Hg nucleus has been produced via the 36S(160Gd, 4n) reaction at a beam energy of 159 MeV. The γ-rays have been detected with the multi-detector array EUROGAM phase 1. The level scheme has been extended up to 10.4 MeV excitation energy and spin 34. Two new structures, composed of competing ΔI = 1 and ΔI = 2 transitions, have been observed and, for the first time in Mercury isotopes, some links with the previously known low-lying states have been established. These experimental results are discussed in terms of mean-field Hartree-Fock plus BCS calculations and the new bands are proposed to originate from deformation-aligned quasi-proton excitations. π(i13/2 * h9/2)kπ=11 and π(h9/2)2kπ=8+ coupled to rotation-aligned quasi-neutrons v(i13/2)n and quasi-proton π(h11/2)2 excitations.