Spontaneous Ultraviolet Emission from 233 Uranium / T 229 horium Samples
1999; American Physical Society; Volume: 82; Issue: 6 Linguagem: Inglês
10.1103/physrevlett.82.1109
ISSN1092-0145
AutoresRobert W. Shaw, J. P. Young, Stanley P. Cooper, Oren F. Webb,
Tópico(s)Radiation Detection and Scintillator Technologies
ResumoThe spontaneous ultraviolet luminescence reported [G. M. Irwin and K. H. Kim, Phys. Rev. Lett. 79, 990 (1997); D. S. Richardson et al., ibid. 80, 3206 (1998)] from ${}^{233}\mathrm{uranium}$ compounds and ascribed to an ultraviolet gamma-ray emission from the metastable ${}^{229}\mathrm{thorium}$ daughter is actually ${\mathrm{N}}_{2}$ discharge emission induced in the air surrounding the sample by the sample radioactivity. The UV spectrum from high elemental and isotopic purity ${}^{233}{\mathrm{UO}}_{3}$ reported here also exhibits a line at 391.3 nm that does not appear to be due to electric discharge ${\mathrm{N}}_{2}$ emission.
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