Search for double- \( \beta\) decays of 96Ru and 104Ru by ultra-low background HPGe \( \gamma\) spectrometry
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- Belli, P., Bernabei, R., Cappella, F. et al. Eur. Phys. J. A (2009) 42: 171. doi:10.1140/epja/i2009-10867-5
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A search for double-\( \beta\) processes in 96Ru and 104Ru was realized in the underground Gran Sasso National Laboratories of the INFN (Italy) with the help of ultra-low background HPGe \( \gamma\) spectrometry. After 158h of data taking with 473g ruthenium sample, new improved limits on double-beta processes in 96Ru have been established on the level of 1018-1019yr. For the first time the double-beta decay of 104Ru to the 2+1 excited level of 104Pd has been restricted as T1/2 > 3.5×1019 yr.