Engineering topics
Krogstad, Eirik
Publications and source records attributed to Krogstad, Eirik.
US-DOE NWAL Support to ESL for 241 Am/ 241 Pu Age Dating: Safeguards Technology Project Overview for the IAEA [Slides]
IAEA Priority Objective T2, R&D Need T.2.R6 to “Develop and implement methods to detect signatures of nuclear activities in environmental samples including: Age determination of U and Pu relevant to the origin of nuclear materials”- specific focus on plutonium (Pu) age dating
Enhanced Pu emission with solution-loaded laser ablation modified sources (SLLAMS) for thermal ionization mass spectrometry
This study presents a new approach to filament modification by laser ablation for analysis of femtograms of plutonium (Pu) by thermal ionization mass spectrometry (TIMS). This method simplifies the often rigorous and labor-intensive sample loading necessary for low-level analyses by TIMS with solution-loaded laser ablation modified sources (SLLAMS). By applying a para-film coating to the surface of the filament and then ablating through the film to reveal metal beneath, a point source is created. A solution containing ppt-levels of Pu can then be applied over the ablated region, dried slowly into the crater, and then carburized. All analyses were made by multiple ion counting system of a Nu Instruments TIMS. Furthermore, we report errors of 10% 2σ for 240 Pu/ 239 Pu of CRM-137 samples totaling 5 – 7 femtograms (fg; 1E-15 g) with an average sample utilization efficiency of 1.3%. Results from SLLAMS demonstrate an improvement in precision, accuracy and ease of use over resin bead loads.
Data for EMSL Project 44703 from April 2020
Explore the source record for details and available documents.
Data for EMSL Project 44703 from April 2020
Explore the source record for details and available documents.
Data for EMSL Project 44703 from April 2020
Explore the source record for details and available documents.