Abstract
Multiple Coulomb excitation measurements on202, 204Hg have been performed with 5 MeV/u208Pb projectiles. The ground bands are excited up to the newly discovered 6+ states and B(E2) values are derived for the 4+→2+ and 6+→4+ transitions. Whereas the 2+ and 4+ levels in the Hg isotopes with 196≦A≦204 have an almost constant energy, the 6+ levels increase in202Hg and204Hg, compared to the lighter isotopes, by approximately 100 and 300 keV, respectively. The relative B(E2) values in both nuclei show that the collectivity in the neutron rich Hg nuclei is of more complex origin than expected from the few proton and neutron holes with respect to the 82 and 126 major shells.
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On leave from Tata Institute of Fundamental Research, Bombay, India
On leave from Jagiellonian University, Krakow, Poland
One of the authors (Y.K.A.) would like to thank Prof. P. Armbruster and his group for their hospitality during his stay at GSI, where part of the present work was done. The financial support of this work by the Bundesministerium für Forschung und Technologie of the Federal Republic of Germany is gratefully acknowledged.
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Agarwal, Y.K., Günther, C., Hardt, K. et al. Multiple coulomb excitation of202Hg and204Hg. Z Physik A 320, 295–299 (1985). https://doi.org/10.1007/BF01881278
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DOI: https://doi.org/10.1007/BF01881278