Title: Underground Search for the Decay of 180Tam
Authors: HULT MIKAELGASPARRO JOELMARISSENS GERDLINDAHL PATRICWAETJEN UWEJOHNSTON Peter N.WAGEMANS CyrielKOEHLER Matthias
Citation: PHYSICAL REVIEW C vol. 74 no. 5 p. 054311-1 to 054311-5
Publisher: AMERICAN PHYSICAL SOC
Publication Year: 2006
JRC N°: JRC33977
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC33977
Type: Articles in Journals
Abstract: Tantalum-180m is a very rare primordial isotope and is not in its nuclear ground state. The radioactivity of 180Tam has not yet been observed. Previous attempts to measure the half-life of 180Tam have been performed using various detectors located above ground. In this work a 606 g Ta disk of natural isotopic composition was measured for 170 days in the 225 m deep underground laboratory HADES. The new lower bound for the half life is 1.7·1016 years for electron capture decay and 1.2·1016 years for β--decay. This gives a total lower bound for the half-life of 7.1·1015 years, which is a factor of 6 higher than the previous lower bound.
JRC Institute:Institute for Reference Materials and Measurements

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.