publication . Article . 1999

Reexamination of the Optical Gamma Ray Decay inT229h

S. B. Utter; Peter Beiersdorfer; A. V. Barnes; R. W. Lougheed; J. R. Crespo López-Urrutia; J. A. Becker; M. S. Weiss;
Open Access
  • Published: 18 Jan 1999 Journal: Physical Review Letters, volume 82, pages 505-508 (issn: 0031-9007, eissn: 1079-7114, Copyright policy)
  • Publisher: American Physical Society (APS)
Abstract
Optical measurements of a clean, $2\ensuremath{-}\ensuremath{\mu}\mathrm{C}$ ${}^{233}\mathrm{U}$ sample were made to verify light emission from gamma ray decay of the first excited nuclear level in ${}^{229}\mathrm{Th}$. The results showed that the light observed in earlier studies was likely to be caused by alpha-particle induced fluorescence of air. In vacuo, no light emission was discernable. The ${}^{229}\mathrm{Th}$ system, therefore, does not appear to provide the level of access for studying atomic-nuclear interactions suggested by the previous measurements.
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free text keywords: General Physics and Astronomy, Uranium-233, Thorium, chemistry.chemical_element, chemistry, Light emission, Physics, Gamma spectroscopy, Gamma ray, Atomic physics, Nuclear physics, Fluorescence, Optical measurements, Excited state
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