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Title: International inter-comparison exercise on $${}^{153}\hbox {Sm}$$153Sm

Abstract

Samarium-153 ( 153Sm) is one of the many isotopes of interest to the nuclear forensics community. This short-lived radionuclide decays to stable europium-153 via beta emission, with subsequent de-excitation via gamma emission and internal conversion. Historical measurements of 153Sm by gamma spectrometry and beta liquid scintillation counting have shown a low bias compared to beta proportional counting. In order to investigate this, four national laboratories jointly conducted an experimental inter-comparison exercise on a certified 153Sm sample, created from neutron activation of samarium-152. Radiometric measurements were conducted using gamma spectrometry, liquid scintillation, gas proportional counting, and passivated implanted planar silicon detectors and compared across the four institutions against the certificate. The results from this experiment are presented together with a number of conclusions which suggest that the current published cumulative fission yield for 153Sm, as used by many laboratories, is approximately 15% high and is the likely cause of the previously observed historical bias.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [4];  [4];  [4];  [4]
  1. Atomic Weapons Establishment (AWE), Reading (United Kingdom)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1524295
Report Number(s):
LLNL-JRNL-771110
Journal ID: ISSN 0236-5731; 961763
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 318; Journal Issue: 1; Journal ID: ISSN 0236-5731
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Jackson, M. J., Gilligan, C., Davies, A. V., Britton, R., Friese, J. I., Greenwood, L. R., Pierson, B. D., Finch, Z. S., Gartman, B. N., Dry, D., May, I., Smythe, N. C., Gaunt, A. J., Thomas, E. R., Roberts, K. E., Harward, N. K., Thomas, K. J., Woody, P. T., and Zhao, P. International inter-comparison exercise on $${}^{153}\hbox {Sm}$$153Sm. United States: N. p., 2018. Web. doi:10.1007/s10967-018-6048-1.
Jackson, M. J., Gilligan, C., Davies, A. V., Britton, R., Friese, J. I., Greenwood, L. R., Pierson, B. D., Finch, Z. S., Gartman, B. N., Dry, D., May, I., Smythe, N. C., Gaunt, A. J., Thomas, E. R., Roberts, K. E., Harward, N. K., Thomas, K. J., Woody, P. T., & Zhao, P. International inter-comparison exercise on $${}^{153}\hbox {Sm}$$153Sm. United States. doi:10.1007/s10967-018-6048-1.
Jackson, M. J., Gilligan, C., Davies, A. V., Britton, R., Friese, J. I., Greenwood, L. R., Pierson, B. D., Finch, Z. S., Gartman, B. N., Dry, D., May, I., Smythe, N. C., Gaunt, A. J., Thomas, E. R., Roberts, K. E., Harward, N. K., Thomas, K. J., Woody, P. T., and Zhao, P. Fri . "International inter-comparison exercise on $${}^{153}\hbox {Sm}$$153Sm". United States. doi:10.1007/s10967-018-6048-1. https://www.osti.gov/servlets/purl/1524295.
@article{osti_1524295,
title = {International inter-comparison exercise on $${}^{153}\hbox {Sm}$$153Sm},
author = {Jackson, M. J. and Gilligan, C. and Davies, A. V. and Britton, R. and Friese, J. I. and Greenwood, L. R. and Pierson, B. D. and Finch, Z. S. and Gartman, B. N. and Dry, D. and May, I. and Smythe, N. C. and Gaunt, A. J. and Thomas, E. R. and Roberts, K. E. and Harward, N. K. and Thomas, K. J. and Woody, P. T. and Zhao, P.},
abstractNote = {Samarium-153 (153Sm) is one of the many isotopes of interest to the nuclear forensics community. This short-lived radionuclide decays to stable europium-153 via beta emission, with subsequent de-excitation via gamma emission and internal conversion. Historical measurements of 153Sm by gamma spectrometry and beta liquid scintillation counting have shown a low bias compared to beta proportional counting. In order to investigate this, four national laboratories jointly conducted an experimental inter-comparison exercise on a certified 153Sm sample, created from neutron activation of samarium-152. Radiometric measurements were conducted using gamma spectrometry, liquid scintillation, gas proportional counting, and passivated implanted planar silicon detectors and compared across the four institutions against the certificate. The results from this experiment are presented together with a number of conclusions which suggest that the current published cumulative fission yield for 153Sm, as used by many laboratories, is approximately 15% high and is the likely cause of the previously observed historical bias.},
doi = {10.1007/s10967-018-6048-1},
journal = {Journal of Radioanalytical and Nuclear Chemistry},
number = 1,
volume = 318,
place = {United States},
year = {2018},
month = {8}
}

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