Zobrazeno 1 - 10
of 60
pro vyhledávání: '"A.W. Myers"'
Autor:
I. J. Arnquist, John L. Orrell, Eric W. Hoppe, A.W. Myers, Sarah M. Shaff, Brian D. Glasgow, Kimbrelle S. Thommasson, Shannon M. Morley, Craig E. Aalseth, Martin E. Keillor, Cory T. Overman, Tere A. Eggemeyer
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 309:1271-1281
Assay methods for measuring 238U, 232Th, and 210Pb concentrations in refined lead are presented. The 238U and 232Th concentrations are determined using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS) after anion exchange col
Autor:
Jonathan E. Strivens, Martin E. Keillor, Brienne N. Seiner, A.W. Myers, Gary A. Gill, Z. S. Finch, Leah M. Arrigo, Todd W. Hossbach
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 307:2451-2458
This project is focused on developing a geochronology tool enabling age dating of coastal marine sediments in the 100–1000 year age range. The technique employs the 32Si/32P radio-chronometer with an ultra-low-background gas proportional beta detec
Autor:
John L. Orrell, Shannon M. Morley, Brian D. Glasgow, Kimbrelle S. Thommasson, Craig E. Aalseth, I. J. Arnquist, Allen Seifert, Cory T. Overman, Tere A. Eggemeyer, Sarah M. Shaff, Martin E. Keillor, Erin S. Fuller, Eric W. Hoppe, A.W. Myers
Publikováno v:
Applied Radiation and Isotopes. 126:185-187
Low-background lead for radiation measurement shielding is often assayed for 210Pb to ensure acceptable backgrounds. Samples of lead assayed with a germanium spectrometer calibrated for bremsstrahlung-based assay of 210Pb provide a view into the 210P
Autor:
A.W. Myers, Justin I. McIntyre, Daniel T. Keller, Craig E. Aalseth, Greg A. Whyatt, Eric W. Hoppe, Todd W. Hossbach, T.W. Bowyer, Scott J. Morris, Allen Seifert, Mark E. Panisko, Harry S. Miley, James C. Hayes, H. O. Back, Anthony R. Day, Martin E. Keillor, Lance S. Lidey, Richard M. Williams, Paul H. Humble, Emily K. Mace, Erin S. Fuller, John L. Orrell, Jennifer M. Mendez, Cory T. Overman, Thomas Alexander
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 954:161794
The measurement of 37Ar has been proposed as a method of detecting underground nuclear testing. The isotope 37Ar is generated by neutron activation of calcium by the reaction, 40Ca(n, a)37Ar, and, as a noble gas, is able to migrate more freely underg
Autor:
Harry S. Miley, Joel B. Forrester, Michael G. Cantaloub, A.W. Myers, B.G. Glasgow, Cory T. Overman, J. L. Burnett, Lawrence R. Greenwood
Publikováno v:
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 126
PNNL has developed two low-background gamma-ray spectrometers in a new shallow underground laboratory, thereby significantly improving its ability to detect low levels of gamma-ray emitting fission or activation products in airborne particulate in sa
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 296:1061-1064
The International Monitoring System is a verification component of the Comprehensive Nuclear-Test-Ban Treaty, and in addition to a series of radionuclide monitoring stations, contains 16 radionuclide laboratories capable of verification of radionucli
Autor:
Eric W. Hoppe, Craig E. Aalseth, Emily K. Mace, Cory T. Overman, Ricco Bonicalzi, Allen Seifert, A.W. Myers, Anthony R. Day, Martin E. Keillor
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 296:753-758
Pacific Northwest National Laboratory (PNNL) has developed an ultra-low-background proportional counter (ULBPC) made of high purity copper. These detectors are part of an ultra-low-background counting system (ULBCS) in the newly constructed shallow u
Autor:
A.W. Myers, Mark E. Panisko, Glen A. Warren, Anthony R. Day, Martin E. Keillor, Richard M. Williams, Emily K. Mace, Cory T. Overman, Craig E. Aalseth, Erin S. Fuller, Eric W. Hoppe, Allen Seifert
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 296:823-827
A new ultra-low-background proportional counter design was recently developed at Pacific Northwest National Laboratory (PNNL). This design, along with an ultra-low-background counting system which provides passive and active shielding with radon excl
Autor:
Jason H. Merriman, James C. Hayes, A.W. Myers, Allen Seifert, Eric W. Hoppe, Ted W. Bowyer, Mark E. Panisko, Cory T. Overman, Paul H. Humble, Emily K. Mace, Ricco Bonicalzi, Erin S. Fuller, Derek A. Haas, Justin I. McIntyre, Brian D. LaFerriere, Anthony R. Day, Craig E. Aalseth, Martin E. Keillor, Harry S. Miley, John L. Orrell, Richard M. Williams
Publikováno v:
AIP Conference Proceedings.
An ultra-low-background proportional counter design has been developed at Pacific Northwest National Laboratory (PNNL) using clean materials, primarily electro-chemically-purified copper. This detector, along with an ultra-low-background counting sys
Autor:
Jason H. Merriman, Allen Seifert, Craig E. Aalseth, Erin S. Fuller, A.W. Myers, Emily K. Mace, Richard M. Williams, Eric W. Hoppe, Glen A. Warren, Anthony R. Day, Martin E. Keillor, Cory T. Overman, Mark E. Panisko, B. LeFerriere
Publikováno v:
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 81
A new ultra-low-background proportional counter was recently developed with an internal volume of 100 cm(3) and has been characterized at pressures from 1-10 atm with P-10 (90% Ar, 10% methane) gas. This design, along with a counting system providing