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Title: Radiography apparatus using gamma rays emitted by water activated by fusion neutrons

Abstract

Radiography apparatus includes an arrangement for circulating pure water continuously between a location adjacent a source of energetic neutrons, such as a tritium target irradiated by a deuteron beam, and a remote location where radiographic analysis is conducted. Oxygen in the pure water is activated via the {sup 16}O(n,p) {sup 16}N reaction using 14-MeV neutrons produced at the neutron source via the {sup 3}H(d,n) {sup 4}He reaction. Essentially monoenergetic gamma rays at 6.129 (predominantly) and 7.115 MeV are produced by the 7.13-second {sup 16}N decay for use in radiographic analysis. The gamma rays have substantial penetrating power and are useful in determining the thickness of materials and elemental compositions, particularly for metals and high-atomic number materials. The characteristic decay half life of 7.13 seconds of the activated oxygen is sufficient to permit gamma ray generation at a remote location where the activated water is transported, while not presenting a chemical or radioactivity hazard because the radioactivity falls to negligible levels after 1--2 minutes.

Inventors:
; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
555598
Patent Number(s):
PATENTS-US-A8583150
Application Number:
ON: DE98001378; PAN: 8-583,150; TRN: AHC29802%%155
Assignee:
US Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent Application
Resource Relation:
Other Information: PBD: 1995
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; GAMMA RADIOGRAPHY; GAMMA SOURCES; NEUTRON SOURCES; CHARGE-EXCHANGE REACTIONS; NEUTRON REACTIONS; OXYGEN 16 TARGET; NITROGEN 16; GAMMA DECAY; FUSION YIELD; RADIOACTIVATION; WATER

Citation Formats

Smith, D L, Ikeda, Yujiro, and Uno, Yoshitomo. Radiography apparatus using gamma rays emitted by water activated by fusion neutrons. United States: N. p., 1995. Web.
Smith, D L, Ikeda, Yujiro, & Uno, Yoshitomo. Radiography apparatus using gamma rays emitted by water activated by fusion neutrons. United States.
Smith, D L, Ikeda, Yujiro, and Uno, Yoshitomo. Sun . "Radiography apparatus using gamma rays emitted by water activated by fusion neutrons". United States. https://www.osti.gov/servlets/purl/555598.
@article{osti_555598,
title = {Radiography apparatus using gamma rays emitted by water activated by fusion neutrons},
author = {Smith, D L and Ikeda, Yujiro and Uno, Yoshitomo},
abstractNote = {Radiography apparatus includes an arrangement for circulating pure water continuously between a location adjacent a source of energetic neutrons, such as a tritium target irradiated by a deuteron beam, and a remote location where radiographic analysis is conducted. Oxygen in the pure water is activated via the {sup 16}O(n,p) {sup 16}N reaction using 14-MeV neutrons produced at the neutron source via the {sup 3}H(d,n) {sup 4}He reaction. Essentially monoenergetic gamma rays at 6.129 (predominantly) and 7.115 MeV are produced by the 7.13-second {sup 16}N decay for use in radiographic analysis. The gamma rays have substantial penetrating power and are useful in determining the thickness of materials and elemental compositions, particularly for metals and high-atomic number materials. The characteristic decay half life of 7.13 seconds of the activated oxygen is sufficient to permit gamma ray generation at a remote location where the activated water is transported, while not presenting a chemical or radioactivity hazard because the radioactivity falls to negligible levels after 1--2 minutes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Patent Application:

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