Re-measured uranium branching ratios and their impact on removing biases from MGAU analyses

PDF Version Also Available for Download.

Description

Biases in MGAU analyses first observed in FSU Gosatomnadzor inspection and subsequently identified in more detail by measurements at the Moscow Kurchatov Institute have forced a new look at the code's analysis assumptions. We have used uranium gamma-ray calibration standards from the National Bureau of Standards and standards from the New Brunswick Laboratory to investigate MGAU analysis biases. The 200g uranium standards which cover the uranium enrichments ranging from 0.3% to 93% were used to collect more than 500 gamma-ray spectra for this study. The experimental arrangement used a LEPS Ge detector with various source-detector configurations and absorbers. Two independent ... continued below

Physical Description

431 Kilobytes pages

Creation Information

Lanier, R G; Ruhter, W D & Wang, T F September 17, 1999.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

Biases in MGAU analyses first observed in FSU Gosatomnadzor inspection and subsequently identified in more detail by measurements at the Moscow Kurchatov Institute have forced a new look at the code's analysis assumptions. We have used uranium gamma-ray calibration standards from the National Bureau of Standards and standards from the New Brunswick Laboratory to investigate MGAU analysis biases. The 200g uranium standards which cover the uranium enrichments ranging from 0.3% to 93% were used to collect more than 500 gamma-ray spectra for this study. The experimental arrangement used a LEPS Ge detector with various source-detector configurations and absorbers. Two independent versions of the MGAU code, which we currently employ in our laboratory, confirm the biases noted in a developing variety of FSU inspection results and in the careful Kurchatov study. In this paper, we will discuss the MGAU methodology and use 250 spectra at a fixed geometry without absorbers to obtain new branching ratios for the critical 100-keV region gamma rays. We show that modifying the branching ratios removes a significant component of the observed biases.

Physical Description

431 Kilobytes pages

Source

  • 6th International Conference on Facility Operations, Safeguards Interface, Jackson Hole, WY (US), 09/20/1999--09/24/1999

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: UCRL-JC-135774
  • Report No.: GD0604020
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14672
  • Archival Resource Key: ark:/67531/metadc621841

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • September 17, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

Description Last Updated

  • May 6, 2016, 1:55 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 10

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Lanier, R G; Ruhter, W D & Wang, T F. Re-measured uranium branching ratios and their impact on removing biases from MGAU analyses, article, September 17, 1999; California. (digital.library.unt.edu/ark:/67531/metadc621841/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.