4.4 Article

Assessing the microscale heterogeneity in Standard Reference Material 4600 Surrogate Post-detonation Urban Debris

Journal

APPLIED RADIATION AND ISOTOPES
Volume 172, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2021.109651

Keywords

Microheterogeneity; SRM; PCA; Surrogate debris; X-ray fluorescence

Funding

  1. FBI Laboratory Division
  2. NIST Radioactivity Group

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Nondestructive microbeam X-ray fluorescence (mu XRF) spectrometry was used to investigate elemental microheterogeneity in a nuclear forensics reference material, showing most elements are homogeneous except for zinc. To minimize measurement uncertainty from elemental microheterogeneity, a minimum sample mass of 24 mg is recommended for analysis.
Nondestructive microbeam X-ray fluorescence (mu XRF) spectrometry has been used to investigate the elemental microheterogeneity in a nuclear forensics reference material (RM), NIST SRM 4600 Surrogate Post-detonation Urban Debris. Using a principal component analysis (PCA) model, results indicate the majority of elements appear homogeneous; however, zinc (Zn) exhibits microscale heterogeneity for this SRM. To minimize contributions to the measurement uncertainty from elemental microheterogeneity, a minimum sample mass of 24 mg is recommended for analysis.

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