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Levels in 185,~SVAu have been studied by radioactive decay of isotopically separated 185,18VHg" A number of low-energy very-converted transitions are observed in the decay. It is shown that the enhanced conversion in these cases comes from an E0 component rather than from an anomaly in the M 1 conversion process. A systematic pattern of bands interconnected with these very converted transitions is presented as evidence for a new type of particle-core coupling in 185,187Au '

The region of neutron-deficient nuclei near Z=82 and N=104 provides the most extensive example of low-energy shape coexistence anywhere on the mass surface. It is shown that EO and EO admixed transitions may be used as a fingerprint to identify shape coexistence in odd-mass nuclei. It is also shown that all the known cases of low energy EO and EO admixed transitions in odd-mass nuclei occur where equally low-lying 0 states occur in neighboring eveneven nuclei. A discussion of these and other relevant data as well as suggestions for new studies which may help to clarify and, more Importantly, quantify the connection between EO transitions and shape coexistence are presented.

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