Detection of 99Tc by accelerator mass spectrometry: preliminary investigations

PDF Version Also Available for Download.

Description

Accelerator mass spectrometry is an established technique for the detection of long-lived radionuclides at environmental levels. At LLNL, planned facility upgrades and advances in detection techniques are allowing us to explore the applicability of AMS to isotopes not previously pursued. One such isotope is technetium-99. We have performed a number of preliminary tests to examine the technical feasibility of AMS for the detection of {sup 99}Tc. The questions addressed were negative ion production in the cesium sputter source, transport efficiency for the ions through the spectrometer, and detection efficiency for {sup 99}Tc ions after the spectrometer. Based on the positive ... continued below

Physical Description

18 pages; Other: FDE: PDF

Creation Information

McAninch, J. E., LLNL April 1, 1997.

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. It has been viewed 19 times . More information about this article can be viewed below.

Who

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

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

Accelerator mass spectrometry is an established technique for the detection of long-lived radionuclides at environmental levels. At LLNL, planned facility upgrades and advances in detection techniques are allowing us to explore the applicability of AMS to isotopes not previously pursued. One such isotope is technetium-99. We have performed a number of preliminary tests to examine the technical feasibility of AMS for the detection of {sup 99}Tc. The questions addressed were negative ion production in the cesium sputter source, transport efficiency for the ions through the spectrometer, and detection efficiency for {sup 99}Tc ions after the spectrometer. Based on the positive results of these tests, we have begun to develop a measurement protocol. Technetium is co-precipitated with rhodium, added as a carrier, which provides a sample form appropriate for sputtering and an isotope for AMS normalization. The {sup 99}Tc is determined from the measured {sup 99}Tc/{sup 103}Rh ratio. To reduce interference from the isobar {sup 99}Ru, an oxidation/distillation method was employed to lower ruthenium in the rhodium stock solution. Characteristic projectile L x-rays are used for ion detection to allow further subtraction of {sup 99}Ru. Results for a series of standards demonstrated linearity and reproducibility. A sensitivity of {approx}500 fg {sup 99}Tc was obtained in this preliminary work, and indications are that a sensitivity in the low femtogram range should be achievable.

Physical Description

18 pages; Other: FDE: PDF

Notes

OSTI as DE00016411

Source

  • 4th International Conference on Methods and Applications of Radioanalytical Chemistry, Kailua-Kona, HI (US), 04/06/1997--04/11/1997; Other Information: Supercedes report DE98051030; PBD: 01 Apr 97

Language

Item Type

Identifier

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

  • Other: DE98051030
  • Report No.: UCRL-JC-127235
  • Report No.: CONF-9704174--
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 16411
  • Archival Resource Key: ark:/67531/metadc628399

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

  • April 1, 1997

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

Description Last Updated

  • Jan. 3, 2017, 2:12 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 19

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

McAninch, J. E., LLNL. Detection of 99Tc by accelerator mass spectrometry: preliminary investigations, article, April 1, 1997; (digital.library.unt.edu/ark:/67531/metadc628399/: accessed May 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.