Cryogenic measurement of alpha decay in a 4 Delta p absorber

We established Q spectroscopy, a novel method for the study of alpha decay, by combining 4 Delta *p detection scheme with a low-temperature microcalorimeter. A 4 Delta *p metal absorber guarantees absolute measurement of radioactivity without energy loss in the source and absorber. As a clear demons...

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Bibliographic Details
Published in:Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2010-05, Vol.37 (5), p.055103-055103
Main Authors: Lee, Sang-Jun, Lee, Min Kyu, Jang, Yong Sic, Kim, Il Hwan, Kim, Sun Kee, Lee, June Sur, Lee, Kyoung Beom, Lee, Young Hwa, Kim, Yong-Hamb
Format: Article
Language:English
Subjects:
Alpha decay
Decay
Energy (nuclear)
Foils
Particle physics
Q values
Radioactivity
Spectroscopy
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Summary:We established Q spectroscopy, a novel method for the study of alpha decay, by combining 4 Delta *p detection scheme with a low-temperature microcalorimeter. A 4 Delta *p metal absorber guarantees absolute measurement of radioactivity without energy loss in the source and absorber. As a clear demonstration of Q spectroscopy, the 241Am alpha source enclosed by a thin gold foil was measured below 100 mK. Its resulting energy spectrum has two dominant peaks with 10 keV FWHM. The more dominant one corresponds to the complete absorption of the Q value, the total decay energy, and the less dominant one to Delta *g-ray escapes. Consequential one-to-one correspondence with high-energy resolution appears between mixed radioisotopes and peaks in Q spectroscopy, which will simplify procedures of nuclear material analysis.
ISSN:0954-3899
DOI:10.1088/0954-3899/37/5/055103