Abstract
Low-lying excited levels in 200 Hg were investigated with a Ge(Li) gamma-ray spectrometer and with an internal conversion coefficient spectrometer. The spin and parity 2 + of the 1028.7-keV third excited level were confirmed, based on the internal conversion coefficient and K/L ratio of the transition from this level to the first excited 2 + state. Several new lines were found. A revised decay scheme was proposed. The experimental results showed that the nuclear structure of this nucleus can be understood fairly well with a model of two-proton holes coupled to harmonic surface vibrations.

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