Elsevier

Nuclear Data Sheets

Volume 145, November 2017, Pages 25-340
Nuclear Data Sheets

Nuclear Data Sheets for A = 99

https://doi.org/10.1016/j.nds.2017.09.002Get rights and content

Abstract

The evaluators present in this publication spectroscopic data and level schemes from radioactive decay and nuclear reactions studies for all isobars with mass number A=99.

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    • Evaluating the intensity of the ‘prompt’ 140.5 keV γ-ray of <sup>99</sup>Mo using a 4παβ(LS)-γ(HPGe) measurement system

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      The 2011-edition of Nuclear Data Sheets recommended the value of (5.1 ± 0.4)% (Browne and Tuli, 2011), based on the work by Simonits et al. (1981). However, the latest edition of the Nuclear Data Sheets does not present a value for the ‘prompt’ intensity (Browne and Tuli, 2017). The common experimental procedure for determining gamma-ray intensities of 99Mo involves its production in a reactor followed by radiochemical processes, used for separation and extraction (Cook et al., 1969; Hasan and Prelas, 2020).

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    Research sponsored by Office of Nuclear Physics, Office of Science, U.S. Department of Energy, under contract DE-AC02-98CH10946. The work is also supported by the Lawrence Berkeley National Laboratory under contract No. DE-AC02-05CH11231 for the US Nuclear Data Program

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