Publications

2020

  • Aalseth C.E., S. Abdelhakim, F. Acerbi, P. Agnes, R. Ajaj, I. Albuquerque, and T.R. Alexander, et al. 2020. "Design and construction of a new detector to measure ultra-low radioactive-isotope contamination of argon." Journal of Instrumentation 15, no. 2:Article No. P02024. PNNL-SA-157079. doi:10.1088/1748-0221/15/02/P02024

2018

  • Mace E.K., C.E. Aalseth, A.R. Day, E.W. Hoppe, J.I. McIntyre, A. Seifert, and R.M. Williams. 2018. "Direct Low-Energy Measurement of 37Ar and 127Xe in a Radiotracer Gas using Low-Background Proportional Counters." Journal of Radioanalytical and Nuclear Chemistry 318, no. 1:125-129. PNNL-SA-133392. doi:10.1007/s10967-018-6074-z

2017

  • Mace E.K., C.E. Aalseth, J.M. Brandenberger, A.R. Day, E.W. Hoppe, P.H. Humble, and M.E. Keillor, et al. 2017. "Methods for Using Argon-39 to Age-Date Groundwater using Ultra-Low-Background Proportional Counting." Applied Radiation and Isotopes 126. PNNL-SA-121026. doi:10.1016/j.apradiso.2016.12.037
  • Williams R.M., C.E. Aalseth, J.M. Brandenberger, A.R. Day, E.C. Finn, E.S. Fuller, and E.W. Hoppe, et al. 2017. "Development of a Low-Level 39Ar Calibration Standard - Analysis by Absolute Gas Counting Measurements Augmented with Simulation." Applied Radiation and Isotopes 126. PNNL-SA-120659. doi:10.1016/j.apradiso.2017.02.018

2016

  • Aalseth C.E., P.H. Humble, E.K. Mace, J.L. Orrell, A. Seifert, and R.M. Williams. 2016. "Shielding concepts for low-background proportional counter arrays in surface laboratories." Applied Radiation and Isotopes 108. PNNL-SA-106350. doi:10.1016/j.apradiso.2015.12.033
  • Mace E.K., C.E. Aalseth, A.R. Day, E.W. Hoppe, M.E. Keillor, J.J. Moran, and M.E. Panisko, et al. 2016. "First results of a simultaneous measurement of tritium and 14C in an ultra-low-background proportional counter for environmental sources of methane." Journal of Environmental Radioactivity 155-156. PNNL-SA-111748. doi:10.1016/j.jenvrad.2016.02.001
  • Williams R.M., C.E. Aalseth, T.W. Bowyer, A.R. Day, E.S. Fuller, D.A. Haas, and J.C. Hayes, et al. 2016. "Development of a Low-Level Ar-37 Calibration Standard." Applied Radiation and Isotopes 109. PNNL-SA-109332. doi:10.1016/j.apradiso.2015.12.027

2015

  • Aalseth C.E., P. Agnes, A. Alton, K. Arisaka, D.M. Asner, H.O. Back, and B. Baldin, et al. 2015. "The DarkSide Multiton Detector for the Direct Dark Matter Search." Advances in High Energy Physics Volume 2015. PNNL-SA-102086. doi:10.1155/2015/541362

2013

  • Aalseth C.E., A.R. Day, E.S. Fuller, E.W. Hoppe, M.E. Keillor, B.D. LaFerriere, and E.K. Mace, et al. 2013. "A New Shallow Underground Gas-Proportional Counting Lab - First Results and Ar-37 Sensitivity." Applied Radiation and Isotopes 81. PNNL-SA-89606. doi:10.1016/j.apradiso.2013.03.050
  • Aalseth C.E., A.R. Day, E.S. Fuller, E.W. Hoppe, M.E. Keillor, E.K. Mace, and A.W. Myers, et al. 2013. "Digital Pulse-Shape Discrimination Applied to an Ultra-Low-Background Gas-Proportional Counting System: First Results." Journal of Radioanalytical and Nuclear Chemistry 296, no. 2:823-827. PNNL-SA-86923. doi:10.1007/s10967-012-2052-z
  • Mace E.K., C.E. Aalseth, R. Bonicalzi, A.R. Day, E.S. Fuller, J.C. Hayes, and E.W. Hoppe, et al. 2013. "Initial Characterization of Unequal-Length, Low-Background Proportional Counters for Absolute Gas-Counting Applications." In LOW RADIOACTIVITY TECHNIQUES 2013 (LRT 2013): Proceedings of the IV International Workshop in Low Radioactivity Techniques, April 10-12, 2013, Assergi, Italy. AIP Conference Proceedings, edited by L Miramonti and L Pandola, 1549, 30. Melville, New York:AIP Publishing. PNNL-SA-96368. doi:10.1063/1.4818069
  • Seifert A., C.E. Aalseth, R. Bonicalzi, T.W. Bowyer, A.R. Day, E.S. Fuller, and D.A. Haas, et al. 2013. "Calibration of an Ultra-Low-Background Proportional Counter for Measuring 37Ar." In Low Radioactivity Techniques 2013 (LRT 2013): Proceedings of the IV International Workshop in Low Radioactivity Techniques, April 10-12, 2013, Assergi, Italy. AIP Conference Proceedings, edited by L Miramonti and LPandola, 1549, 26-29. Melville, New York:AIP Publishing. PNNL-SA-96364. doi:10.1063/1.4818068
  • Williams R.M., C.E. Aalseth, J.H. Ely, A.R. Day, J.C. Hayes, E.W. Hoppe, and B.D. LaFerriere, et al. 2013. "Development of an Absolute Gas-Counting Capability for Low to Medium Activities." Applied Radiation and Isotopes 81. PNNL-SA-89541. doi:10.1016/j.apradiso.2013.03.064

2011

  • Harper W.W., J.C. Hayes, P.H. Humble, L.S. Lidey, and R.M. Williams. 2011. "LIMITATIONS USING SMALL VOLUME CRYOTRAPS." In Proceedings of the 33rd Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies, September 13-15, 2011, Tucson, Arizona, LA-UR-11-04823, 689-694. Washington Dc, District Of Columbia:National Nuclear Security Administration. PNNL-SA-81135.

2009

  • Humble P.H., R.M. Williams, and J.C. Hayes. 2009. "Finite Element Modeling of Adsorption Processes for Gas Separation and Purification." In Monitoring Research Review (MRR 2009): Ground-Based Nuclear Explosion Monitoring Technologies, September 21-23, Tucson, Arizona, 659-666. Los Alamos, New Mexico:Los Alamos National Laboratory. PNNL-SA-67474.
  • Ringbom A., K. Elmgren, K. Lindh, J. Peterson, T.W. Bowyer, J.C. Hayes, and J.I. McIntyre, et al. 2009. "Measurements of radioxenon in ground level air in South Korea following the claimed nuclear test in North Korea on October 9, 2006." Journal of Radioanalytical and Nuclear Chemistry 282, no. 3:773-779. PNNL-SA-69254.

2004

  • Taubman M.S., T.L. Myers, B.D. Cannon, and R.M. Williams. 2004. "Stabilization, Injection and Control of Quantum Cascade Lasers, and Their Appli-cation to Chemical Sensing in the Infrared." Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 60, no. 14:3457-3468. PNNL-SA-39789. doi:10.1016/j.saa.2003.12.057

2003

  • Schultz J.F., M.S. Taubman, W.W. Harper, R.M. Williams, T.L. Myers, B.D. Cannon, and D.M. Sheen, et al. 2003. "Quantum cascade transmitters for ultra-sensitive chemical agent and explosives detection." In Quantum Sensing: Evolution and Revolution from Past to Future, SPIE Proceedings, edited by M Razeghi and GJ Brown, 4999. Bellingham, Washington:Society of Photo-Optical Instrumentation Engineers. PNWD-SA-5913.

2002

  • Capasso F., R. Paiella, R. Martini, R. Colombelli, C.F. Gmachl, T.L. Myers, and M.S. Taubman, et al. 2002. "Quantum Cascade Lasers: Ultrahigh-Speed Operation, Optical Wirless Communication, Narrow Linewidth, and Far-Infrared Emission." IEEE Journal of Quantum Electronics 38, no. 6:511. PNWD-SA-5752.
  • Myers T.L., R.M. Williams, M.S. Taubman, C. Gmachl, F. Capasso, D.L. Sivco, and J.N. Baillargeon, et al. 2002. "Free-Running Frequency Stability of Mid-Infrared Quantum Cascade Lasers." Optics Letters 27, no. 3:170-172. PNWD-SA-5478.
  • Taubman M.S., T.L. Myers, B.D. Cannon, R.M. Williams, F. Capasso, C.F. Gmachl, and D.L. Sivco, et al. 2002. "Frequency Stabilization of Quantum-Cascade Lasers by Use of Optical Cavities." Optics Letters 27, no. 24:2164-2166. PNWD-SA-5761.

1999

  • Hess W.P., A.G. Joly, K.M. Beck, R.M. Williams, and J. Dickinson. 1999. "Femtosecond Time-Resolved Laser Induced Desorption of Positive Ions from MgO." Applied Physics A, Materials Science and Processing 69. PNNL-SA-31434.
  • Williams R.M., J.F. Kelly, J.S. Hartman, S.W. Sharpe, M. Taubman, J.L. Hall, and J.L. Hall, et al. 1999. "Kilohertz linewidth from frequency-stabilized mid-infrared quantum cascade lasers." Optics Letters 24, no. 24:1844 - 1846. PNNL-SA-31468.