Detection of the natural {alpha} decay of tungsten

The natural {alpha}-decay of {sup 180}W has been unambiguously detected for the first time. The {alpha} peak is found in a ({gamma}, {beta}, and neutron)-free background spectrum. This has been achieved by the simultaneous measurement of phonon and light signals with the CRESST (Cryogenic Rare Event...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2004-12, Vol.70 (6)
Main Authors: Cozzini, C., Henry, S., Kraus, H., Majorovits, B., Mikhailik, V., Ramachers, Y., Tolhurst, A.J.B., Angloher, G., Hauff, D., Ninkovic, J., Petricca, F., Proebst, F., Seidel, W., Stodolsky, L., Bucci, C., Feilitzsch, F. von, Jagemann, Th, Potzel, W., Rau, W., Razeti, M.
Format: Article
Language:English
Subjects:
ALPHA DECAY
ALPHA SPECTRA
ENERGY-LEVEL TRANSITIONS
HALF-LIFE
KEV RANGE
NUCLEAR PHYSICS AND RADIATION PHYSICS
PHONONS
TUNGSTEN 180
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Summary:The natural {alpha}-decay of {sup 180}W has been unambiguously detected for the first time. The {alpha} peak is found in a ({gamma}, {beta}, 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 T{sub 1/2}=(1.8{+-}0.2)x10{sup 18} 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.
ISSN:0556-2813
1089-490X
DOI:10.1103/PhysRevC.70.064606