Abstract
A search for the various double-{beta} decay modes of {sup 124}Sn and {sup 112}Sn has been performed on 75 kg days of data. New half-life limits for excited states in {sup 124}Sn have been obtained including a lower limit for decay into the first excited 2{sup +} state of {sup 124}Te of T{sub 1/2}>0.87x10{sup 20} yr (90% C.L.) and into the first excited 0{sup +} state of T{sub 1/2}>1.08x10{sup 20} yr (90% C.L.). Ground state and excited state transitions of {sup 112}Sn have also been experimentally explored. A limit for the 2{nu} EC/EC of T{sub 1/2}>1.8x10{sup 19} yr (90% C.L.) is obtained. The nonobservation of deexcitation {gamma} from the 0{sup +} at 1888.5 keV results in a lower half-life limit on the 0{nu} EC/EC decay of {sup 112}Sn of T{sub 1/2}>0.8x10{sup 19}yr (90% C.L.), despite a possible resonant enhancement of the decay rate due to degenerated states.
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