| Inferred initial 26Al/27Al ratios in presolar stardust grains from supernovae are higher than previously estimated E Groopman, E Zinner, S Amari, F Gyngard, P Hoppe, M Jadhav, Y Lin, ... The Astrophysical Journal 809 (1), 31, 2015 | 35 | 2015 |
| Jamming in systems with quenched disorder CJ Olson Reichhardt, E Groopman, Z Nussinov, C Reichhardt Physical Review E—Statistical, Nonlinear, and Soft Matter Physics 86 (6 …, 2012 | 35 | 2012 |
| C, N, and O isotopic heterogeneities in low-density supernova graphite grains from Orgueil E Groopman, T Bernatowicz, E Zinner The Astrophysical Journal Letters 754 (1), L8, 2012 | 24 | 2012 |
| Refractory metal nuggets within presolar graphite: First condensates from a circumstellar environment TK Croat, T Berg, T Bernatowicz, E Groopman, M Jadhav Meteoritics & Planetary Science 48 (4), 686-699, 2013 | 23 | 2013 |
| Measurement of Uranium Isotopes in Particles of U3O8 by Secondary Ion Mass Spectrometry–Single-Stage Accelerator Mass Spectrometry (SIMS–SSAMS) AJ Fahey, EE Groopman, KS Grabowski, KC Fazel Analytical chemistry 88 (14), 7145-7153, 2016 | 17 | 2016 |
| An overview of NRL's NAUTILUS: a combination SIMS-AMS for spatially resolved trace isotope analysis EE Groopman, DG Willingham, AJ Fahey, KS Grabowski Journal of analytical atomic spectrometry 35 (3), 600-625, 2020 | 12 | 2020 |
| Discovery of fissionogenic Cs and Ba capture five years after Oklo reactor shutdown EE Groopman, DG Willingham, AP Meshik, OV Pravdivtseva Proceedings of the National Academy of Sciences 115 (35), 8676-8681, 2018 | 11 | 2018 |
| Correlated XANES, TEM, and NanoSIMS of presolar graphite grains EE Groopman, LR Nittler Geochimica et Cosmochimica Acta 221, 219-236, 2018 | 10 | 2018 |
| Rapid, molecule-free, in situ rare earth element abundances by SIMS-SSAMS EE Groopman, KS Grabowski, AJ Fahey, L Kööp Journal of Analytical Atomic Spectrometry 32 (11), 2153-2163, 2017 | 10 | 2017 |
| Improved uranium particle analysis by SIMS using O 3− primary ions EE Groopman, TL Williamson, DS Simons Journal of analytical atomic spectrometry 37 (10), 2089-2102, 2022 | 8 | 2022 |
| NanoSIMS, TEM, and XANES studies of a unique presolar supernova graphite grain E Groopman, LR Nittler, T Bernatowicz, E Zinner The Astrophysical Journal 790 (1), 9, 2014 | 8 | 2014 |
| Direct, uncorrected, molecule-free analysis of 236 U from uranium-bearing particles with NAUTILUS: a new kind of mass spectrometer D Willingham, EE Groopman, KS Grabowski, L Sangely Analyst 143 (22), 5364-5371, 2018 | 7 | 2018 |
| Orgueil Low-Density Presolar Carbon ain't Graphite but Glassy Carbon B Wopenka, E Groopman, E Zinner Meteoritics and Planetary Science Supplement 74, 5032, 2011 | 5 | 2011 |
| Long-term retention and chemical fractionation of fissionogenic Cs and Tc in Oklo natural nuclear reactor fuel EE Groopman, LR Nittler, DG Willingham, AP Meshik, OV Pravdivtseva Applied Geochemistry 131, 105047, 2021 | 4 | 2021 |
| U–Pu Mixed Oxide Particle Analysis by NAUTILUS and Implications for Next-Generation Verification Challenges D Willingham, E Groopman, L Sangely Journal of the American Society for Mass Spectrometry 31 (8), 1647-1655, 2020 | 4 | 2020 |
| Enhanced spatially-resolved trace analysis using combined SIMS–single-stage AMS KS Grabowski, EE Groopman, AJ Fahey Nuclear Instruments and Methods in Physics Research Section B: Beam …, 2017 | 3 | 2017 |
| Magnetic Characterization of Electrodeposited Pt1− xNix Alloy Films: Influence of Deposition Potential and the Presence of Boric Acid ED Rus, EL Corrêa, E Groopman, T Williamson, H Hijazi, L Kasaei, ... Journal of The Electrochemical Society 169 (9), 092518, 2022 | 2 | 2022 |
| Positive ion SIMS-SSAMS for trace analysis of materials KS Grabowski, EE Groopman, BY Rock, MA Imam Nuclear Instruments and Methods in Physics Research Section B: Beam …, 2019 | 2 | 2019 |
| Trace element determination in presolar grains with the NRL SIMS-SSAMS EE Groopman, AJ Fahey, KS Grabowski 79th Annual Meeting of the Meteoritical Society 79 (1921), 6196, 2016 | 2 | 2016 |
| Isotopic composition and trace element abundances of a presolar SiC AB grain reconstructed by atom-probe tomography JB Lewis, D Isheim, C Floss, E Groopman, F Gyngard, DN Seidman 77th Annual Meeting of the Meteoritical Society 77 (1800), 5367, 2014 | 2 | 2014 |
David WillinghamLawrence Livermore National Laboratory在 llnl.gov 的电子邮件经过验证
