Static, Mixed-Array Total Evaporation for Improved Quantitation of Plutonium Minor Isotopes in Small Samples

Area of Science:

• Nuclear forensics
• Isotope ratio mass spectrometry
• Radiochemistry

Background:

• Actinide isotope measurements are crucial for nuclear forensics.
• Traditional methods struggle with low abundance isotope ratios (<10^-6) in limited samples.
• Plutonium minor isotope analysis faces challenges due to radiological concerns.

Purpose of the Study:

• To investigate static, mixed array total evaporation techniques.
• To improve plutonium minor isotope measurements.
• To address limitations in current methodologies for small sample analysis.

Main Methods:

• Application of static, mixed array total evaporation.
• Utilizing thermal ionization mass spectrometry.
• Analysis of a plutonium isotope reference material (CRM-126a) with small sample sizes (~20 ng).

Main Results:

• Demonstrated successful application of the new technique on small samples.
• Achieved improved measurements of plutonium minor isotopes.
• Compared results with traditional total evaporation methods, showing enhanced performance.

Conclusions:

• Static, mixed array total evaporation is a viable method for enhancing plutonium minor isotope measurements.
• This technique offers a straightforward approach to overcome limitations with small and radiologically challenging samples.
• The findings contribute to advancing nuclear forensics capabilities.