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Title: Deuteron irradiation of W and WO 3 for production of high specific activity 186Re: Challenges associated with thick target preparation

Abstract

This investigation evaluated target fabrication and beam parameters for scale-up production of high specific activity 186Re using deuteron irradiation of enriched 186W via the 186W(d,2n) 186Re reaction. Thick W and WO 3 targets were prepared, characterized and evaluated in deuteron irradiations. Full-thickness targets, as determined using SRIM, were prepared by uniaxi-ally pressing powdered natural abundance W and WO 3, or 96.86% enriched 186W, into Al target supports. Alternatively, thick targets were prepared by pressing 186W between two layers of graphite powder or by placing pre-sintered (1105°C, 12 hours) natural abundance WO 3 pellets into an Al target support. Assessments of structural integrity were made on each target pre-pared. Prior to irradiation, material composition analyses were conducted using SEM, XRD, and Raman spectroscopy. With-in a minimum of 24 hours post irradiation, gamma-ray spectroscopy was performed on all targets to assess production yields and radionuclidic byproducts. Problems were encountered with the structural integrity of some pressed W and WO 3 pellets before and during irradiation, and target material characterization results could be correlated with the structural integrity of the pressed target pellets. Under the conditions studied, the findings suggest that all WO 3 targets prepared and studied were unacceptable. By contrast, 186Wmore » metal was found to be a viable target material for 186Re production. Lastly, thick targets prepared with powdered 186W pressed between layers of graphite provided a particularly robust target configuration.« less

Authors:
 [1];  [2];  [3];  [4];  [1];  [1];  [3];  [5];  [6];  [7];  [8];  [1]
  1. Univ. of Washington, Seattle, WA (United States). Dept. of Radiation Oncology
  2. Univ. of Washington, Seattle, WA (United States). Dept. of Radiation Oncology; Univ. of Alberta, Edmonton, AB (Canada). Cross Cancer Inst., Dept. of Oncology
  3. Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering
  4. Univ. of Washington, Seattle, WA (United States). Dept. of Chemistry
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Collider-Accelerator Dept.; Univ. of Missouri Research Reactor Center, Columbia, MO (United States)
  7. Univ. of Missouri Research Reactor Center, Columbia, MO (United States)
  8. Univ. of Missouri, Columbia, MO (United States). of Chemistry
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1338598
Alternate Identifier(s):
OSTI ID: 1358798
Report Number(s):
BNL-113242-2016-JA
Journal ID: ISSN 0969-8043; R&D Project: KBCH139; KB0202011; TRN: US1701816
Grant/Contract Number:  
SC0012704; SC0007348
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Radiation and Isotopes
Additional Journal Information:
Journal Volume: 115; Journal Issue: C; Journal ID: ISSN 0969-8043
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ¹⁸⁶Re production; Pressed targets; W and WO₃ thick targets; Deuteron induced reaction; High specific activity

Citation Formats

Balkin, Ethan R., Gagnon, Katherine, Strong, Kevin T., Smith, Bennett E., Dorman, Eric F., Emery, Robert C., Pauzauskie, Peter J., Fassbender, Michael E., Cutler, Cathy S., Ketring, Alan R., Jurisson, Silvia S., and Wilbur, D. Scott. Deuteron irradiation of W and WO3 for production of high specific activity 186Re: Challenges associated with thick target preparation. United States: N. p., 2016. Web. doi:10.1016/j.apradiso.2016.06.021.
Balkin, Ethan R., Gagnon, Katherine, Strong, Kevin T., Smith, Bennett E., Dorman, Eric F., Emery, Robert C., Pauzauskie, Peter J., Fassbender, Michael E., Cutler, Cathy S., Ketring, Alan R., Jurisson, Silvia S., & Wilbur, D. Scott. Deuteron irradiation of W and WO3 for production of high specific activity 186Re: Challenges associated with thick target preparation. United States. doi:10.1016/j.apradiso.2016.06.021.
Balkin, Ethan R., Gagnon, Katherine, Strong, Kevin T., Smith, Bennett E., Dorman, Eric F., Emery, Robert C., Pauzauskie, Peter J., Fassbender, Michael E., Cutler, Cathy S., Ketring, Alan R., Jurisson, Silvia S., and Wilbur, D. Scott. Tue . "Deuteron irradiation of W and WO3 for production of high specific activity 186Re: Challenges associated with thick target preparation". United States. doi:10.1016/j.apradiso.2016.06.021. https://www.osti.gov/servlets/purl/1338598.
@article{osti_1338598,
title = {Deuteron irradiation of W and WO3 for production of high specific activity 186Re: Challenges associated with thick target preparation},
author = {Balkin, Ethan R. and Gagnon, Katherine and Strong, Kevin T. and Smith, Bennett E. and Dorman, Eric F. and Emery, Robert C. and Pauzauskie, Peter J. and Fassbender, Michael E. and Cutler, Cathy S. and Ketring, Alan R. and Jurisson, Silvia S. and Wilbur, D. Scott},
abstractNote = {This investigation evaluated target fabrication and beam parameters for scale-up production of high specific activity 186Re using deuteron irradiation of enriched 186W via the 186W(d,2n)186Re reaction. Thick W and WO3 targets were prepared, characterized and evaluated in deuteron irradiations. Full-thickness targets, as determined using SRIM, were prepared by uniaxi-ally pressing powdered natural abundance W and WO3, or 96.86% enriched 186W, into Al target supports. Alternatively, thick targets were prepared by pressing 186W between two layers of graphite powder or by placing pre-sintered (1105°C, 12 hours) natural abundance WO3 pellets into an Al target support. Assessments of structural integrity were made on each target pre-pared. Prior to irradiation, material composition analyses were conducted using SEM, XRD, and Raman spectroscopy. With-in a minimum of 24 hours post irradiation, gamma-ray spectroscopy was performed on all targets to assess production yields and radionuclidic byproducts. Problems were encountered with the structural integrity of some pressed W and WO3 pellets before and during irradiation, and target material characterization results could be correlated with the structural integrity of the pressed target pellets. Under the conditions studied, the findings suggest that all WO3 targets prepared and studied were unacceptable. By contrast, 186W metal was found to be a viable target material for 186Re production. Lastly, thick targets prepared with powdered 186W pressed between layers of graphite provided a particularly robust target configuration.},
doi = {10.1016/j.apradiso.2016.06.021},
journal = {Applied Radiation and Isotopes},
number = C,
volume = 115,
place = {United States},
year = {Tue Jun 28 00:00:00 EDT 2016},
month = {Tue Jun 28 00:00:00 EDT 2016}
}

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