Journal of Radioanalytical and Nuclear Chemistry

, Volume 303, Issue 3, pp 1851–1856 | Cite as

Anomalous radiochemical recovery of post-detonation gold residues at the National Ignition Facility

  • Patrick M. GrantEmail author
  • Kenton J. Moody
  • Narek Gharibyan
  • John D. Despotopulos
  • Dawn A. Shaughnessy


Activated Au from a fragmented and dispersed NIF hohlraum is of interest to measure the induced 14.1-MeV 198m+gAu/196gAu isotope ratio as an assessment of shot performance. A radiochemical recovery procedure, based on Au complexation by cyanide in NaOH-NaCN solution, was developed to reclaim radiogold (*Au) residues from post-detonation graphite collector foils. The average overall radiochemical yield from grafoils in an equatorial position relative to the hohlraum was 88 %. However, the yield from the identical procedure applied to post-shot grafoils positioned axially (polar) was much decreased. The chemical dependency of explosion reaction products on collector position around an ostensibly symmetric fusion source is currently unexplained.


Inertial confinement fusion (ICF) NIF post-detonation debris specimens 14.1-MeV neutron reaction products Graphite foil collectors Cyanide solution chemistry Au radiochemical recoveries Anomaly of NIF equatorial versus polar chemical behavior 



The authors thank the NIF Nuclear Diagnostics Group and NIF Engineering and Operations staff, in particular, Richard Zacharias, Kenn Knittel, Christopher Wlodarczyk, Justin Wright, Bowdi Helgesen, Glenn Grant, Tim Cunningham, Wayne Abreu, James Daly, Bahram Talison, and the NIF Radiation Control Technicians. The assistance of Phil Torretto and Todd Wooddy in the LLNL Nuclear Counting Facility is also gratefully acknowledged. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, and was funded by the Laboratory Directed Research and Development Program at LLNL under project tracking code 13-ERD-036. Disclaimer This document was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor Lawrence Livermore National Security, LLC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or Lawrence Livermore National Security, LLC. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or Lawrence Livermore National Security, LLC, and shall not be used for advertising or product endorsement purposes.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2014

Authors and Affiliations

  • Patrick M. Grant
    • 1
    Email author
  • Kenton J. Moody
    • 1
  • Narek Gharibyan
    • 1
  • John D. Despotopulos
    • 1
  • Dawn A. Shaughnessy
    • 1
  1. 1.Chemical Sciences Division, Experimental Nuclear and Radiochemistry GroupLivermore National LaboratoryLivermoreUSA

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