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Title: Method for on-line evaluation of materials using prompt gamma ray analysis

Patent ·
OSTI ID:1013824
 [1]
  1. Idaho Falls, ID
+ Show Author Affiliations

A method for evaluating a material specimen comprises: Mounting a neutron source and a detector adjacent the material specimen; bombarding the material specimen with neutrons from the neutron source to create prompt gamma rays within the material specimen, some of the prompt gamma rays being emitted from the material specimen, some of the prompt gamma rays resulting in the formation of positrons within the material specimen by pair production; collecting positron annihilation data by detecting with the detector at least one emitted annihilation gamma ray resulting from the annihilation of a positron; storing the positron annihilation data on a data storage system for later retrieval and processing; and continuing to collect and store positron annihilation data, the continued collected and stored positron annihilation data being indicative of an accumulation of lattice damage over time.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-99ID13727
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID)
Patent Number(s):
7,630,469
Application Number:
US Patent Application 10/788,743
OSTI ID:
1013824
Country of Publication:
United States
Language:
English

References (4)

Study of the Van Cittert and Gold iterative methods of deconvolution and their application in the deconvolution of experimental spectra of positron annihilation
  • Bandžuch, P.; Morháč, M.; Krištiak, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 384, Issue 2-3 https://doi.org/10.1016/S0168-9002(96)00874-1
journal January 1997
Analysis of positron annihilation lifetime data presented as a sum of convoluted exponentials with the program “SPLMOD”
  • Zhu, Yongkang; Gregory, Roger B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 284, Issue 2-3 https://doi.org/10.1016/0168-9002(89)90316-1
journal December 1989
Analysis of positron annihilation lifetime data by numerical laplace inversion with the program CONTIN
  • Gregory, Roger B.; Zhu, Yongkang
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 290, Issue 1 https://doi.org/10.1016/0168-9002(90)90358-D
journal May 1990
A positron annihilation lifetime spectroscopy study of porous silicon using a continuous lifetime fitting algorithm journal January 1996

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36 MATERIALS SCIENCE