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Title: Isotope-resolved atomic beam laser spectroscopy of natural uranium

Here, we present our results on the development of a technique for conducting laser absorption spectroscopy of uranium in a collimated atomic beam using a compact and potentially fieldable device. A solid natural uranium metal sample is vaporized in a modest vacuum of several mTorr via resistive heating of a tantalum foil micro-crucible. A temperature of over 2000 °C is reached by applying only 200 W of electrical power to the crucible. At this temperature, the vapor pressure of uranium is large enough to generate a stable atomic beam. A diode laser is tuned around the 861.031 nm uranium transition, which allows the observation of absorption bands from both the 238U and 235U isotopes. The isotopic composition of uranium Standard Reference Material 960 is obtained from the absorption signal, in excellent agreement with the nominal value. In conclusion, our approach can be readily applied to the isotopic analysis of other actinides, and it is expected to lead to the development of compact, fieldable instrumentation.
Authors:
 [1] ;  [1] ; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-18-24794
Journal ID: ISSN 0267-9477; JASPE2
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Journal of Analytical Atomic Spectrometry
Additional Journal Information:
Journal Name: Journal of Analytical Atomic Spectrometry; Journal ID: ISSN 0267-9477
Publisher:
Royal Society of Chemistry
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OSTI Identifier:
1471366
Alternate Identifier(s):
OSTI ID: 1468828

Lebedev, Vyacheslav, Bartlett, Joshua H., and Castro, Alonso. Isotope-resolved atomic beam laser spectroscopy of natural uranium. United States: N. p., Web. doi:10.1039/C8JA00242H.
Lebedev, Vyacheslav, Bartlett, Joshua H., & Castro, Alonso. Isotope-resolved atomic beam laser spectroscopy of natural uranium. United States. doi:10.1039/C8JA00242H.
Lebedev, Vyacheslav, Bartlett, Joshua H., and Castro, Alonso. 2018. "Isotope-resolved atomic beam laser spectroscopy of natural uranium". United States. doi:10.1039/C8JA00242H.
@article{osti_1471366,
title = {Isotope-resolved atomic beam laser spectroscopy of natural uranium},
author = {Lebedev, Vyacheslav and Bartlett, Joshua H. and Castro, Alonso},
abstractNote = {Here, we present our results on the development of a technique for conducting laser absorption spectroscopy of uranium in a collimated atomic beam using a compact and potentially fieldable device. A solid natural uranium metal sample is vaporized in a modest vacuum of several mTorr via resistive heating of a tantalum foil micro-crucible. A temperature of over 2000 °C is reached by applying only 200 W of electrical power to the crucible. At this temperature, the vapor pressure of uranium is large enough to generate a stable atomic beam. A diode laser is tuned around the 861.031 nm uranium transition, which allows the observation of absorption bands from both the 238U and 235U isotopes. The isotopic composition of uranium Standard Reference Material 960 is obtained from the absorption signal, in excellent agreement with the nominal value. In conclusion, our approach can be readily applied to the isotopic analysis of other actinides, and it is expected to lead to the development of compact, fieldable instrumentation.},
doi = {10.1039/C8JA00242H},
journal = {Journal of Analytical Atomic Spectrometry},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}

Works referenced in this record:

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