The yrast superdeformed band in 194Pb. Differences with 192Hg

Gall, B.J.P. and Deloncle, I. and Porquet, M.-G. and Hannachi, F. and Aïche, M. and Azaiez, F. and Bastin, G. and Beausang, C.W. and Béraud, R. and Bourgeois, C. and Clark, R.M. and Duffait, R. and Duprat, J. and Hauschild, K. and Hübel, H. and Joyce, M.J. and Kaci, M. and Korichi, A. and Le Coz, Y. and Meyer, M. and Paul, E.S. and Perrin, N. and Poffé, N. and Redon, N. and Schück, C. and Sergolle, H. and Sharpey-Schafer, J.F. and Smith, A.G. and Wadsworth, R. (1995) The yrast superdeformed band in 194Pb. Differences with 192Hg. Physics Letters B, 345 (2). pp. 124-130. ISSN 0370-2693

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The yrast superdeformed (SD) structure of 194Pb has been studied using the EUROGAM γ-ray spectrometer. New results have been obtained at low as well as at high spin values. At low frequency, the SD band has been extended to the lowest-spin SD state ever observed in the A ∼ 190 region. The energies of 194Pb and 192Hg SD bands are identical for ω < 0.25 MeV. However, they diverge for higher frequency, which rules out the idea that these two SD bands are identical. Moreover, the SD band of 194Pb is populated at lower spin values than that of 192Hg and de-excites towards normally-deformed (ND) states at a spin value lower than that of 192Hg. This suggests that the barrier separating the SD and ND minima in the potential energy surface is higher in 194Pb than in 192Hg.

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Journal Article
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Physics Letters B
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01 Apr 2019 13:20
Last Modified:
18 Sep 2023 01:33