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A new method for internal calibration of nuclear track detectorsA new technique is proposed for an internal calibration of a two-layer detector assembly. Spatially coincident pairs of conical tracks on one surface and overetched tracks on the adjacent surface are selected for measurement. Both the etch rate ratio and the particle range can be obtained from the minor and major diameters of the elliptical track and the radii of the circular tracks for two etching steps. This technique was applied to CR-39 detectors exposed to fast neutrons and those flown on a high altitude balloon in order to evaluate the proton response. An improvement by using multi-step etching was also carried out. It was found that not only a single set of the etch rate ratio and the range but also the response curve could be estimated in an extended region by analyzing combined growth curves.
Document ID
20040090396
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Oda, K.
(University of San Francisco CA 94117)
Csige, I.
Henke, R. P.
Benton, E. V.
Date Acquired
August 21, 2013
Publication Date
July 1, 1992
Publication Information
Publication: International Journal Of Radiation Applications And Instrumentation. Part D, Nuclear Tracks And Radiation Measurements
Volume: 20
Issue: 3
ISSN: 0735-245X
Subject Category
Instrumentation And Photography
Funding Number(s)
CONTRACT_GRANT: NAG8-789
CONTRACT_GRANT: NAG8-168
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Radiation Health
Balloon Flight
Non-NASA Center
Flight Experiment
unmanned
NASA Program Radiation Health
NASA Discipline Number 04-10

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