Determination of gamma-ray emission probabilities in the decay of 235U and 231Th

Vaninbroukx, R.; Denecke, B.

doi:10.1016/0029-554x(82)90695-4

Cited by 32 publications

(1 citation statement)

References 21 publications

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“…Separation of the 182.57 and 185.7 keV gamma rays was such that the channel between these peaks contained approximately 0.02% (above background) of the net 186 keV peak region counts. The 071, 194, 295 and 446 sample series were counted for times sufficient to accumulate approximately 5 x 10^net counts in the 186 keV peak region (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) hours live time) .…”

Section: Nbs Gamma Spectrometry Measurementsmentioning

confidence: 99%

Standard Reference Materials

Connolly¹,

DeBievre²,

Eschbach³

et al. 1986

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This 260 Series is dedicated to the dissemination of information on all phases of the preparation of the NBS uranium isotopic SRM for nondestructive assay. In general, much more detail will be found in this 260 than is generally allowed, or desirable, in scientific journal articles. This enables the user to assess the validity of processes employed, and to learn details of methods utilized for work entailing the greatest care. It is hoped that this 260 will provide sufficient additional information not found on the certificate so that new applications of these SRM's may be found.

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Section: Nbs Gamma Spectrometry Measurementsmentioning

confidence: 99%

Standard Reference Materials

Connolly¹,

DeBievre²,

Eschbach³

et al. 1986

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Determination of234U/238U and235U/238U ratios from commercially available uranium compounds by α-spectrometry

Iturbe

1992

Journal of Radioanalytical and Nuclear Chemistry Letters

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Reinvestigation of low-lying levels of231Th

Yuki

Nakazawa

Ohtsuki

et al. 1999

J Radioanal Nucl Chem

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Low-lying excited levels of 231Th fed through a-decay of 235U were investigated by using a-y and y-y coincidence technique. From the analyses for co-relating energy levels and transition intensities, we found that the most favorable transition from 205.3 keV ([631 ]7/2) level that is fed by the most dominant ct transition from 235U is 19.6 keV transition (205.3 keV [63117/2--)185.7 keV [63115/2 ). We also found that the transition probability of 109.2 keV, 205.3 keV [63117/2---)96.1 keV [63319/2 § was corrected to be weak. These findings can explain why the 185.7 keV yray is so strongly observed, 0.57 photons/a, in the y-spectrum associated with the s-decay of 235U. The decay scheme of Z31Th levels previously reported has been modified according to the present analysis.

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Determination of gamma-ray emission probabilities in the decay of 235U and 231Th

Cited by 32 publications

References 21 publications

Standard Reference Materials

Standard Reference Materials

Determination of234U/238U and235U/238U ratios from commercially available uranium compounds by α-spectrometry

Reinvestigation of low-lying levels of231Th

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