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Phys. Rev. C 70, 064606 (2004) [6 pages]

Detection of the natural α decay of tungsten

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C. Cozzini1 *, G. Angloher2, C. Bucci3, F. von Feilitzsch4, D. Hauff2, S. Henry1, Th. Jagemann4, J. Jochum5, H. Kraus1, B. Majorovits1, V. Mikhailik1, J. Ninkovic2, F. Petricca2, W. Potzel4, F. Pröbst2, Y. Ramachers1 †, W. Rau4, M. Razeti4, W. Seidel2, M. Stark4, L. Stodolsky2, A. J. B. Tolhurst1, W. Westphal4, and H. Wulandari4
1Department of Physics, University of Oxford, Oxford OX1 3RH, United Kingdom
2MPI für Physik, Föhringer Ring 6, 80805 Munich, Germany
3Laboratori Nazionali del Gran Sasso, 67010 Assergi, Italy
4Physikdepartment E-15, TU München, James-Franck-Strasse, 85748 Garching, Germany
5Eberhard-Karls-Universität Tübingen, D-72076 Tübingen, Germany

Received 6 August 2004; published 13 December 2004

The natural α -decay of 180W has been unambiguously detected for the first time. The α peak is found in a ( γ , β , and neutron)-free background spectrum. This has been achieved by the simultaneous measurement of phonon and light signals with the CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) cryogenic detectors. A half-life of T1∕2=(1.8±0.2)×1018  years and an energy release of Q=[2516.4±1.1(stat.)±1.2(sys.)]  keV have been measured. New limits are also set on the half-lives of the other naturally occurring tungsten isotopes.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.70.064606
DOI: 10.1103/PhysRevC.70.064606
PACS: 23.60.+e, 07.20.Mc, 27.70.+q, 29.40.Mc

* Corresponding author. Email address: c.cozzini@physics.ox.ac.uk
† Present address: University of Warwick, Coventry CV4 7AL, UK.

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