skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A Priori Method of Using Photon Activation Analysis to Determine Unknown Trace Element Concentrations in NIST Standards

Abstract

Photon activation analysis detected elements in two NIST standards that did not have reported concentration values. A method is currently being developed to infer these concentrations by using scaling parameters and the appropriate known quantities within the NIST standard itself. Scaling parameters include: threshold, peak and endpoint energies; photo-nuclear cross sections for specific isotopes; Bremstrahlung spectrum; target thickness; and photon flux. Photo-nuclear cross sections and energies from the unknown elements must also be known. With these quantities, the same integral was performed for both the known and unknown elements resulting in an inference of the concentration of the un-reported element based on the reported value. Since Rb and Mn were elements that were reported in the standards, and because they had well-identified peaks, they were used as the standards of inference to determine concentrations of the unreported elements of As, I, Nb, Y, and Zr. This method was tested by choosing other known elements within the standards and inferring a value based on the stated procedure. The reported value of Mn in the first NIST standard was 403{+-}15 ppm and the reported value of Ca in the second NIST standard was 87000 ppm (no reported uncertainty). The inferred concentrations weremore » 370{+-}23 ppm and 80200{+-}8700 ppm respectively.« less

Authors:
;  [1];  [1];  [2]; ;  [3]
  1. Idaho State University-Physics Department, Idaho 83406 (United States)
  2. (United States)
  3. Idaho State University-Anthropology Department (United States)
Publication Date:
OSTI Identifier:
21289684
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1099; Journal Issue: 1; Conference: CAARI 2008: 12. international conference on application of accelerators in research and industry, Fort Worth, TX (United States), 10-15 Aug 2008; Other Information: DOI: 10.1063/1.3120190; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ARSENIC; BREMSSTRAHLUNG; CALCIUM; CONCENTRATION RATIO; CROSS SECTIONS; INDIUM; MANGANESE; MULTI-ELEMENT ANALYSIS; NIOBIUM; PHOTON ACTIVATION ANALYSIS; PHOTONUCLEAR REACTIONS; QUANTITATIVE CHEMICAL ANALYSIS; RUBIDIUM; STANDARDS; TRACE AMOUNTS; YTTRIUM; ZIRCONIUM

Citation Formats

Green, Jaromy, Sun Zaijing, Wells, Doug, Idaho Accelerator Center, Benson, Buck, and Maschner, Herb. A Priori Method of Using Photon Activation Analysis to Determine Unknown Trace Element Concentrations in NIST Standards. United States: N. p., 2009. Web. doi:10.1063/1.3120190.
Green, Jaromy, Sun Zaijing, Wells, Doug, Idaho Accelerator Center, Benson, Buck, & Maschner, Herb. A Priori Method of Using Photon Activation Analysis to Determine Unknown Trace Element Concentrations in NIST Standards. United States. doi:10.1063/1.3120190.
Green, Jaromy, Sun Zaijing, Wells, Doug, Idaho Accelerator Center, Benson, Buck, and Maschner, Herb. Tue . "A Priori Method of Using Photon Activation Analysis to Determine Unknown Trace Element Concentrations in NIST Standards". United States. doi:10.1063/1.3120190.
@article{osti_21289684,
title = {A Priori Method of Using Photon Activation Analysis to Determine Unknown Trace Element Concentrations in NIST Standards},
author = {Green, Jaromy and Sun Zaijing and Wells, Doug and Idaho Accelerator Center and Benson, Buck and Maschner, Herb},
abstractNote = {Photon activation analysis detected elements in two NIST standards that did not have reported concentration values. A method is currently being developed to infer these concentrations by using scaling parameters and the appropriate known quantities within the NIST standard itself. Scaling parameters include: threshold, peak and endpoint energies; photo-nuclear cross sections for specific isotopes; Bremstrahlung spectrum; target thickness; and photon flux. Photo-nuclear cross sections and energies from the unknown elements must also be known. With these quantities, the same integral was performed for both the known and unknown elements resulting in an inference of the concentration of the un-reported element based on the reported value. Since Rb and Mn were elements that were reported in the standards, and because they had well-identified peaks, they were used as the standards of inference to determine concentrations of the unreported elements of As, I, Nb, Y, and Zr. This method was tested by choosing other known elements within the standards and inferring a value based on the stated procedure. The reported value of Mn in the first NIST standard was 403{+-}15 ppm and the reported value of Ca in the second NIST standard was 87000 ppm (no reported uncertainty). The inferred concentrations were 370{+-}23 ppm and 80200{+-}8700 ppm respectively.},
doi = {10.1063/1.3120190},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1099,
place = {United States},
year = {Tue Mar 10 00:00:00 EDT 2009},
month = {Tue Mar 10 00:00:00 EDT 2009}
}