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Search Publications by: Leticia Pibida (Fed)

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Displaying 51 - 75 of 88

NIST Handbook 150-23, 2010 ed., National Voluntary Laboratory Accreditation Program (NVLAP) Homeland Security Applications: Radiation Detection Instruments

April 13, 2010
Author(s)
Betty A. Sandoval, Leticia S. Pibida, Gordon Gillerman, Michael P. Unterweger
NIST Handbook 150-23, NVLAP Homeland Security Applications: Radiation Detection Instruments, presents the technical requirements and guidance for the accreditation of laboratories that test radiation detection instruments used in homeland security

A New Primary Standardization of Th-229

January 7, 2010
Author(s)
Ryan P. Fitzgerald, Lizbeth Laureano-Perez, Michelle M. Hammond, Leticia S. Pibida, Svetlana Nour, Brian E. Zimmerman
The National Institute of Standards and Technology (NIST) has certified a high-purity Th-229 Standard Reference Material as SRM 4328C, based on live-timed 4-pi alpha,beta-gamma anticoincidence counting (LTAC) of the equilibrium solution. The LTAC system

Half-life Measurements of Sr82

January 30, 2009
Author(s)
Leticia S. Pibida, Ryan P. Fitzgerald, Michael P. Unterweger, Michelle M. Hammond, Daniel B. Golas
Half-life measurements of 82Sr were performed at the National Institute of Standards and Technology (NIST) using gamma-ray spectrometry and a 4 pressurized ionization chamber. The 82Sr half-life was determined to be 25.36 ± 0.03 days (k=1) using the

Performance of CdTe, HPGe and NaI(Tl) Detectors for Radioactivity Measurements

October 16, 2008
Author(s)
A Perez-Andujar, Leticia Pibida
The characteristics and performances of the NIST High Purity Germanium (HPGe), Sodium Iodide (NaI(Tl)) and Cadmium Telluride (CdTe) gamma-ray detectors were studied. The efficiencies, the minimum detectable activities and the energy resolutions each were

Investigation of Source Detection Algorithms for Gross Counting Portal Monitors

February 8, 2006
Author(s)
C G. Wahl, D J. Alderson, Leticia S. Pibida
In recent years, heightened security concerns have prompted increased interest in radiation portal monitors, instruments capable of detecting, and in some cases identifying, gamma-ray and neutron-emitting radioactive material passing through them. Along
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