Direct, uncorrected, molecule-free analysis of 236U from uranium-bearing particles with NAUTILUS: a new kind of mass spectrometer

D. Willingham, E. E. Groopman, K. S. Grabowski and L. Sangely

Analyst, 2018, 143, 5364
DOI: 10.1039/C8AN01451E

An overview of NRL's NAUTILUS: a combination SIMS-AMS for spatially resolved trace isotope analysis

Evan E. Groopman, David G. Willingham, Albert J. Fahey and Kenneth S. Grabowski

J. Anal. At. Spectrom., 2020, 35, 600
DOI: 10.1039/C9JA00344D

Exploring Rare Earth Elements in complex microscopic mineral phases: Inputs from μLIBS imaging

Cécile Fabre, Lucas Marulier, Behzad Monfaredi, Vincent Motto-Ros, Bruno Bousquet, Aurélien Eglinger and Alexandre Tarantola

Spectrochimica Acta Part B: Atomic Spectroscopy, 2024, 216, 106954
DOI: 10.1016/j.sab.2024.106954

Avoiding polyatomic interferences in measurements of lanthanides in uranium material for nuclear forensic purposes

Anna Vesterlund and Henrik Ramebäck

J Radioanal Nucl Chem, 2019, 321, 723
DOI: 10.1007/s10967-019-06623-5

Discovery of fissionogenic Cs and Ba capture five years after Oklo reactor shutdown

Evan E. Groopman, David G. Willingham, Alex P. Meshik and Olga V. Pravdivtseva

Proc. Natl. Acad. Sci. U.S.A., 2018, 115, 8676
DOI: 10.1073/pnas.1807267115

Positive ion SIMS-SSAMS for trace analysis of materials

K.S. Grabowski, E.E. Groopman, B.Y. Rock and M.A. Imam

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2019, 455, 158
DOI: 10.1016/j.nimb.2018.12.021

Long-term retention and chemical fractionation of fissionogenic Cs and Tc in Oklo natural nuclear reactor fuel

Evan E. Groopman, Larry R. Nittler, David G. Willingham, Alex P. Meshik and Olga V. Pravdivtseva

Applied Geochemistry, 2021, 131, 105047
DOI: 10.1016/j.apgeochem.2021.105047