Two-proton high-K oblate structures in 194Pb

Porquet, M. G. and Hannachi, F. and Bastin, G. and Brindejonc, V. and Deloncle, I. and Gall, B. and Schuck, C. and Smith, A. G. and Azaiez, F. and Bourgeois, C. and Duprat, J. and Korichi, A. and Perrin, N. and Poffe, N. and Sergolle, H. and Astier, A. and Le Coz, Y. and Meyer, M. and Redon, N. and Simpson, J. and Sharpey-Schafer, J. F. and Joyce, M. J. and Beausang, C. W. and Wadsworth, R. and Clark, R. M. (1994) Two-proton high-K oblate structures in 194Pb. Journal of Physics G: Nuclear and Particle Physics, 20 (5). pp. 765-773. ISSN 0954-3899

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Two regular dipole gamma -ray cascades have been observed in 194Pb. A comprehensive level scheme related to these structures has been built and first members of rotational bands built on K=8 and K=11 two-proton oblate states have been identified. From the excitation energies, spin values, behaviours of the moments of inertia and alignments, and from the comparison with the isotone 192Hg, multiparticle configurations can be attributed to three high-spin structures of 194Pb built respectively on the 4966 keV, 4334 keV and 6198 keV levels: ( pi 9/2(505) pi 13/2(606))(vi13/2)2, ( pi 9/2(505) pi 13/2(606))(vf5/2vi13/2), ( pi 9/2(505) pi 13/2(606)) (vf5/2(vi13/2)3). Within this interpretation, the regular dipole bands correspond to the presence of two or three i13/2 decoupled neutrons.

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Journal of Physics G: Nuclear and Particle Physics
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11 Feb 2019 09:05
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21 Sep 2023 02:32