Abstract
Gamma-ray and conversion electron spectra were measured in the reaction of 25 MeV deuterons on174Yb,196,198Pt,202,204Hg, and232Th. The (d,pxn) deuteron break-up reactions were studied by the measurement ofpγ- andγγ-coincidences. Levels with spins up to approximately 10ħ are observed in the (d,pn) reactions, with a strong preference of the population of yrast states. In the Pt and Hg nuclei the ground bands are seen up to the 6+ states and in196,198pt the semi-decoupled 5−, 7−, and 9− yrast levels are populated most strongly. In202,204Hg we observe fairly strongly new levels with tentative assignments of 5− and 7−. In addition a number of previously unknown levels are identified in the Pt and Hg nuclei, for which no spin-parity assignments could be obtained. A discussion of the level structure in terms of the interacting boson model (196,198Pt) and the shell model (202,204Hg) is given.
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We have benefitted from interesting and helpful discussions with J. Ernst on the deuteron break-up process. We are grateful to J. Kleinfeller and R. Linnemann for the calculations with the code BREAK1. A discussion of the nuclear structure of204Hg by J. Blomqvist has been very helpful. The financial suport of this work by the Bundesrninisterium für Forschung und Technologie of the Federal Republic of Germany is gratefully acknowledged.
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Schüler, P., Recht, J., Wilzek, H. et al. Investigation of196,198Pt and202,204Hg with the (d, pnγ) reaction. Z Physik A 317, 313–324 (1984). https://doi.org/10.1007/BF01438363
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DOI: https://doi.org/10.1007/BF01438363