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RESEARCH PRODUCT
Search for the radioactivity of 180mTa using an underground HPGe sandwich spectrometer
Joël GasparroMikael HultUwe WätjenJ.s. Elisabeth WieslanderM. MisiaszekGerd Marissenssubject
PhysicsRadiationIsotopeSpectrometerRadiochemistryTantalumchemistry.chemical_elementTantalumMass spectrometryParticle detectorSemiconductor detectorSpectrometry GammaRadioactivitychemistryMeasuring instrumentGamma spectroscopyHalf-Lifedescription
Abstract The radioactivity of 180m Ta has never been detected. The present attempt to detect it was carried out using a newly developed HPGe sandwich spectrometer installed 500 m water equivalent underground in the HADES laboratory. The sample consisted of 6 discs of tantalum of natural isotopic composition with a total mass of 1500 g and a total mass for 180 Ta of 180 mg. The sample was measured for 68 days and the resulting lower bound for the half-life of 180m Ta was 2.0×10 16 y, which is a factor of 2.8 higher than the previous highest value.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-02-28 | Applied Radiation and Isotopes |