Publications

Aug, 2026

Journal

High-Resolution Laser Spectroscopy on the Hyperfine Structure of 255Fm (𝑍=100)

We report on high-resolution laser spectroscopy of 255Fm (𝑇1/2=20  h), one of the heaviest nuclides available from reactor breeding. The hyperfine structures in two different atomic ground-state transitions at 398.4 nm and 398.2 nm were probed by in-source laser spectroscopy at the RISIKO mass separator in Mainz, using the perpendicularly illuminated laser ion source and t…

Jul, 2026

ORNL Report

Plutonium-238 Supply Program Chemical Processing Campaign 2

Jul, 2026

Journal

Quantifying Temperature Dependence of Pu(IV) Absorbance Spectra for Advanced Online Monitoring of Nuclear Processes

This article presents a systematic study of Pu(IV) absorbance spectral features as a function of temperature to develop an understanding of this parameter’s effect on chemometric models that can be used as online monitoring tools to support nuclear processing. The descriptive and predictive models that provide real-time feedback of these processes are usually constructed w…

May, 2026

ORNL Report

Spectrophotometric analysis of P6MX-1 for the Pu-238 Supply Program

Apr, 2026

Journal

Near-Real-Time Material Tracking: Combining Vis–NIR Spectroscopy with Flow Sensing for Accurate Nd(III) Quantification

A fiber-optic visible–near-infrared (vis–NIR) absorption spectroscopy and flow sensor system has been developed for near-real-time tracking of Nd mass in the effluent stream from a column in a fume hood. The approach leverages two unique data streams and a partial least-squares regression (PLSR) model trained on vis–NIR absorption spectra of Nd(III) (0–1.5 M) in 1 M HNO3.…

Mar, 2026

Conference Paper

Initial Testing of Mediated Electrochemical Oxidation for Inclusion in the Plutonium-238 Production Program

Oak Ridge National Laboratory is currently restarting the United States’ capability to produce kilogram quantities of 238Pu annually for space power applications. This involves the purification of 238Pu from neutron-irradiated 237Np targets and conversion to heat-source plutonium oxide product for shipment to Los Alamos National Laboratory. Dissolution of the plutonium oxi…

Mar, 2026

Conference Paper

Chemical Processing Waste Remediation in the Plutonium-238 Supply Program

Jan, 2026

Journal

Optimization and quantification of silver(ii) for mediated electrochemical oxidation applications

Mediated electrochemical oxidation (MEO) is a low-temperature, low-pressure, aqueous mineralization process used to treat organic waste. A powerful metal oxidant is used as a mediator in an acidic solution. Although Ce and Co are thoroughly studied mediators, Ag is a preferred choice because of the higher efficiency rates of mineralization observed with this system. Import…

Dec, 2025

ORNL Report

Progress Establishing Optical Spectroscopy for Neptunium Nuclear Material Control and Accounting Measurements to Support the Plutonium-238 Supply Program

Nov, 2025

ORNL Report

240Pu Spectroelectrochemical Studies to Advance Online Monitoring for the 238Pu Supply Program

Nov, 2025

ORNL Report

Radioisotope Science and Technology Division FY 2025 Core R&D Summary Report: Competitive Projects, Postdoctoral Researchers, and Student Interns

Sep, 2025

Journal

Computational Modeling to Advance Novel Medical Isotopes for Radiotheranostics: A DOE-NIH Joint Workshop Executive Summary

The DOE-NIH Joint Workshop on Computational Modeling to Advance Novel Medical Isotopes for Radiotheranostics, held on September 27, 2024, brought together experts from government, academia, and industry to address critical challenges in radionuclide production and clinical translation. The workshop emphasized interdisciplinary collaboration, particularly between the Depart…