Analysis of a Bulk ²³⁷Np Oxide Sample for Trace Actinides

Technical Report · Thu Sep 22 00:00:00 EDT 2022

DOI:https://doi.org/10.2172/1889945· OSTI ID:1889945

Reilly, Sean Douglas ^[1]; Hanson, Susan Meriel Kloek ^[1]; May, Iain ^[1]; Gaunt, Andrew James ^[1]; Sanborn, Matthew Edward ^[1]; Oldham, Warren James ^[1]; Miller, Jeffrey L. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

A neptunium oxide sample was dissolved and trace actinide constituents were measured by isotope dilution ICP-MS (for ^239–244Pu, ^233–238U, ²³⁷Np, ^241–243Am) and alpha spectrometry (²³⁸Pu, ²⁴²Cm, ²⁴⁴Cm). This material contained significant quantities of transuranic elements, notably americium and curium. The isotopic composition of the material will continue to evolve over time due to radioactive decay; the measurements reported here include all isotopes decay corrected to a reference date of 1/1/2022. These factors may be considerations in criticality studies of the related ²³⁷Np sphere.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• DOE Contract Number: 89233218CNA000001
• OSTI ID: 1889945
• Report Number(s): LA-UR-22-29909
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Alpha Spectrometry
ICP-MS
Integral Experiments
Nuclear Criticality Safety Program (NCSP)