Search Results - "Lamont, S. P."

Gamma spectroscopy analysis of archived Marshall Island soil samples by Herman, S., Hoffman, K., Lavelle, K., Trauth, A., LaMont, S. P., Hamilton, T., Glover, S. E., Connick, W., Spitz, H.

“…Four samples of archival Marshall Islands soil were subjected to non-destructive, broad energy (17 keV–2.61 MeV) gamma-ray spectrometry analysis using a series…”
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Superconducting Transition-Edge Sensor Microcalorimeters for Ultra-High Resolution Alpha-Particle Spectrometry by Croce, M P, Bacrania, M K, Bond, E M, Dry, D E, Klingensmith, A L, Moody, W A, LaMont, S P, Rabin, M W, Rim, J H, Beall, J A, Bennett, D A, Kotsubo, V, Horansky, R D, Hilton, G C, Schmidt, D, Ullom, J N, Cantor, R

“…Alpha-particle spectrometry is a powerful analytical tool for nuclear forensics and environmental monitoring. Superconducting transition-edge sensor…”
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Plutonium Partitioning to Colloidal and Particulate Matter in an Acidic, Sandy Sediment:  Implications for Remediation Alternatives and Plutonium Migration by Loyland Asbury, S. M, Lamont, S. P, Clark, S. B

“…Plutonium partitioning within a bulk, freshwater sediment and to specific size fractions of the sediment was determined. Fission track analysis was used to…”
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Reference materials for neptunium determination by Jerome, S.M., Carney, K., Essex, R., Fassbender, M.E., Goldberg, S., Kinlaw, M., LaMont, S.P., Mackney, D., Morrison, J.J., Nortier, F.M.

“…•This paper reviews the current state of the art for neptunium reference materials.•Options for the production of Neptunium-236 at three institutes are…”
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Plutonium determination in bioassay samples using radiochemical thermal ionization mass spectrometry by LaMont, S. P., Shick, C. R., Cable-Dunlap, P., Fauth, D. J., LaBone, T. R.

“…Accelerator mass spectrometry (AMS) is a sensitive and robust technique typically applied to the quantification of long-lived radioisotopes in samples too…”
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Uranium age determination by measuring the (230)Th/(234)U ratio by LaMont, S P, Hall, G

“…A radiochemical isotope dilution mass spectrometry method has been developed to determine the age of uranium materials. The amount of (230)Th activity, the…”
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History of the plutonium bioassay program at the Los Alamos National Laboratory, 1944–2006 by Efurd, D. W., Steiner, R. E., LaMont, S. P., Lewis, D.

“…In 1944 Los Alamos National Laboratory (LANL) instituted a program for the collection and analyses of urine samples from individuals working with plutonium…”
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Micro-electrodeposition techniques for the preparation of small actinide counting sources for ultra-high resolution alpha spectrometry by microcalorimetry by Plionis, A. A., Rim, J. H., Hastings, E. P., LaMont, S. P., Dry, D. E., Bacrania, M. K., Horansky, R. D., Ullom, J. N., Beall, J. A., Rabin, M. W.

“…Special considerations and techniques are desired for the preparation of small actinide counting sources. Counting sources have been prepared on metal disk…”
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Determination of plutonium-240/239 ratios in low activity samples using high resolution alpha-spectrometry by LaMont, S. P., Glover, S. E., Filby, R. H.

“…Isotopic ratios of240Pu/239Pu in environmental samples can provide improtant data for identifying and confirming contamination sources. One low cost…”
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Analysis of Nuclear Material by Alpha Spectroscopy with a Transition-Edge Microcalorimeter by Horansky, R. D., Ullom, J. N., Beall, J. A., Hilton, G. C., Irwin, K. D., Vale, L., Dry, D., Lamont, S. P., Rudy, C. R., Rabin, M. W.

“…We present measurements from a cryogenic microcalorimeter designed to detect alpha particles. The enhanced resolution of microcalorimeter alpha detectors will…”
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Processing of bone samples for the determination of ultra low-levels of uranium and plutonium by Efurd, D. W., Steiner, R. E., LaMont, S. P., Musgrave, J. A., Kottmann, D. L.

“…We have developed cleanroom compatible techniques for processing bone samples for characterization of their uranium and plutonium content. The bone samples are…”
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Evaluation of measurements of Pu, Pu and Pu in urine at the microbecquerel level using thermal ionization mass spectrometry and alpha-spectrometry at Los Alamos National Laboratory: Results of a two year comparison test (LA-UR-06-8055) by Bores, N E, Schultz, M K, Rankin, J M, Denton, A J, Payne, G F, Steiner, R E, Lamont, S P, Ortiz, S B

“…The Intercomparison Studies Program (ISP) at the Oak Ridge National Laboratory (ORNL, Oak Ridge, TN, USA) provides natural-matrix urine…”
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Evaluation of measurements of 238Pu, 239Pu and 240Pu in urine at the microbecquerel level using thermal ionization mass spectrometry and alpha-spectrometry at Los Alamos National Laboratory: Results of a two year comparison test (LA-UR-06-8055) by Bores, N. E., Schultz, M. K., Rankin, J. M., Denton, A. J., Payne, G. F., Steiner, R. E., LaMont, S. P., Ortiz, S. B.

“…The Intercomparison Studies Program (ISP) at the Oak Ridge National Laboratory (ORNL, Oak Ridge, TN, USA) provides natural-matrix urine…”
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In vitro dissolution characteristics of aged and recrystallised high-fired 232ThO2 by LAMONT, S. P, FILBY, R. H, GLOVER, S. E

“…The dissolution characteristics of 232Th from ThO2 in the lung have been determined in an in vitro study. Two types of ThO2 were examined to determine if the…”
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Gamma spectroscopy analysis of archived Marshall Island soil samples by Herman, S., Hoffman, K., Lavelle, K., Trauth, A., LaMont, S. P., Hamilton, T., Glover, S. E., Connick, W., Spitz, H.

“…Four samples of archival Marshall Islands soil were subjected to non-destructive, broad energy (17 keV–2.61 MeV) gamma-ray spectrometry analysis using a series…”
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Radiochronological age of a uranium metal sample from an abandoned facility by Meyers, Lisa A., Williams, Ross W., Glover, Samuel E., LaMont, Stephen P., Stalcup, Apryll M., Spitz, Henry B.

“…A piece of scrap uranium metal bar buried in the dirt floor of an old, abandoned metal rolling mill was analyzed using multi-collector inductively coupled…”
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In vitro lung dissolutions rates for PuO2 by LaMont, S. P., LaBone, T. R., Cadieux, J. R., Findley, W. M., Hall, G., Shick, C. R., Efurd, D. W., Steiner, R. E.

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In Vitro Dissolution Characteristics of Aged and Recrystallized High-fired 232ThO2 by P. LaMont, S., H. Filby, R., E. Glover, S.

“…The dissolution characteristics of 232Th from ThO2 in the lung have been determined in an in vitro study. Two types of ThO2 were examined to determine if the…”
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In Vitro Dissolution Characteristics of Aged and Recrystallised High-Fired super(232)ThO sub(2) by LaMont, S P, Filby, R H, Glover, SE

“…Scientists enacted an in vitro study to help evaluate the dissolution behavior of super(232)Th from ThO sub(2) in the lung. Tests investigating these issues…”
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High Resolution Alpha Particle Spectroscopy with Cryogenic Microcalorimeters by Ullom, J.N., Horansky, R.D., Beall, J.A., Doriese, W.B., Duncan, W.D., Ferreira, L., Hilton, G.C., Irwin, K.D., Reintsema, C.D., Vale, L., Rabin, M.W., Hoover, A.S., Lamont, S.P., Rudy, C.R.

“…We present measurements from a novel cryogenic microcalorimeter designed to detect alpha particles. We demonstrate a spectral resolution of 4.4 keV FWHM for…”
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