Radiography studies with gamma rays produced by 14-MeV fusion neutrons

PDF Version Also Available for Download.

Description

Oxygen contained in pure water has been activated via the {sup 16}O(n, p){sup 16}N reaction using 14-MeV neutrons produced at a neutron generator with the {sup 3}H(d,n){sup 4}He source. Photons of 6.129 and 7.115 MeV, generated by the decay of 7.13-second {sup 16}N, were then used to demonstrate the feasibility of employing highly penetrating, nearly monoenergetic gamma rays for radiography studies of thick, dense objects composed of elements with medium to relatively high atomic numbers. A simple radiography apparatus was constructed by circulating water continuously between a position near the target of the neutron generator and a remote location where ... continued below

Physical Description

32 p.

Creation Information

Smith, D. L.; Ikeda, Yujiro & Uno, Yoshitomo December 1996.

Context

This report 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 33 times , with 4 in the last month . More information about this report can be viewed below.

Who

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

Authors

  • Smith, D. L. Argonne National Lab., IL (United States). Technology Development Div.
  • Ikeda, Yujiro
  • Uno, Yoshitomo Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Fusion Neutronics Lab.

Sponsors

Publisher

  • Argonne National Laboratory
    Publisher Info: Argonne National Lab., IL (United States). Technology Development Div.
    Place of Publication: Illinois

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 report. Follow the links below to find similar items on the Digital Library.

Description

Oxygen contained in pure water has been activated via the {sup 16}O(n, p){sup 16}N reaction using 14-MeV neutrons produced at a neutron generator with the {sup 3}H(d,n){sup 4}He source. Photons of 6.129 and 7.115 MeV, generated by the decay of 7.13-second {sup 16}N, were then used to demonstrate the feasibility of employing highly penetrating, nearly monoenergetic gamma rays for radiography studies of thick, dense objects composed of elements with medium to relatively high atomic numbers. A simple radiography apparatus was constructed by circulating water continuously between a position near the target of the neutron generator and a remote location where photon transmission measurements were conducted. A sodium iodide scintillator was employed to detect the photons. Pulses equivalent to photon energies smaller than 2.506 MeV (corresponding to the cascade sum of 1.333- and 1.173-MeV gamma rays from the decay of 5.271-year {sup 60}Co) were rejected by the electronics settings in order to reduce background and improve the signal-to-noise (S/N) ratio. Respectable S/N ratios on the order of 20-to-1 were achieved with this setup. Most of the background (N) could be attributed to ambient environmental radiation and cosmic-ray interactions with the lead shielding and detector. Four representative objects were examined by photon radiography in this study. This demonstrated how such - interesting features as hidden holes and discontinuities in atomic number could be easily identified from observed variations in the intensity of transmitted photons. Some advantages of this technique are described, and potential applications are suggested for a future scenario where fusion reactors are used to generate electric power and very intense sources of high-energy photons from {sup 16}N decay are continuously available as a byproduct of the reactor cooling process.

Physical Description

32 p.

Notes

INIS; OSTI as DE97002607

Source

  • Other Information: PBD: [1996]

Language

Item Type

Identifier

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

  • Other: DE97002607
  • Report No.: ANL/TD/PP--84095
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/434915 | External Link
  • Office of Scientific & Technical Information Report Number: 434915
  • Archival Resource Key: ark:/67531/metadc675122

Collections

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

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • December 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

Description Last Updated

  • Dec. 11, 2015, 4:39 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 4
Total Uses: 33

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Smith, D. L.; Ikeda, Yujiro & Uno, Yoshitomo. Radiography studies with gamma rays produced by 14-MeV fusion neutrons, report, December 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc675122/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.