title: Study of the double beta decays of 96Ru and 104Ru.
abstract: In this work we present new improved experimental limits for the partial half-lives of the double beta processes of (96)Ru and (104)Ru, obtained by means of a γ-ray spectrometry measurement. A disc of metallic Ru of natural isotopic abundance was sandwiched between two HPGe-detectors in the 225 m deep underground laboratory HADES. After 108 days of measurement, the lower bounds for the partial half-lives were up to 6.9×10(19) yr for (96)Ru and 1.9×10(20) yr for (104)Ru.
authors.affiliation: European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium. erica.andreotti@ec.europa.eu
authors.forename: Erica
authors.initials: E
authors.lastname: Andreotti
authors.forename: Mikael
authors.initials: M
authors.lastname: Hult
authors.forename: Gerd
authors.initials: G
authors.lastname: Marissens
authors.forename: Raquel González
authors.initials: RG
authors.lastname: de Orduña
authors.forename: Peter
authors.initials: P
authors.lastname: Vermaercke
mesh_terms: D001610:Beta Particles; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006207:Half-Life; D007554:Isotopes / Q000032:analysis / Q000737:chemistry; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D012428:Ruthenium / Q000032:analysis* / Q000737:chemistry*; D012666:Semiconductors; D013051:Spectrometry, Gamma / Q000295:instrumentation* / Q000379:methods
chemical_list: D007554:Isotopes; D012428:Ruthenium