Elsevier

Nuclear Physics A

Volume 455, Issue 2, 14 July 1986, Pages 231-293
Nuclear Physics A

A study of the low-lying states in 178Hf through the (n, γ) reaction

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Abstract

The nucleus 178Hf was studied through thermal neutron and averaged resonance neutron capture reactions. The γ-ray and conversion electrons were measured with high resolution spectrometers. A level scheme up to an excitation energy of ∼2.1 MeV was constructed. It includes ∼65 levels, most of which are ordered into 18 rotational bands. The level scheme is complete up to about 1800keV for spins between 2 and 5. The neutron binding energy was established to be at 7626.3 (3) keV. The consistent Q form of the IBA-1 (CQF) was used to describe the low-lying collective γ and Kπ = 0+ bands. The agreement with the data was found to be excellent for the energies and B(E2) ratios of the ground and γ bands, whereas the agreement was poor for the Kπ = 0+ bands.

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    Work supported by the Ministerium für Wissenschaft und Forschung, Land NRW, FRG. Work supported in part under contract DE-AC02-76CH00016 with the United States Dept. of Energy. One of us (RFC) acknowledges support from the von Humboldt Foundation, FRG.

    1

    Institut für Kernphysik, Universität zu Köln, FRG.

    2

    Brookhaven National Laboratory, NY, USA, and Institut für Kernphysik, Universität zu Köln, FRG.

    3

    Institut für Naturwissenschaft und ihre Didaktik, Köln, FRG.

    4

    CEN Bordeaux-Gradignon, 33170 Gradignon, France.

    5

    Institut Laue-Langevin (ILL), Grenoble Cedex, France.

    6

    University of Surrey, Surrey GU2 5XH, England.

    7

    Brookhaven National Laboratory, NY, USA.

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