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Effect of fast neutron, gamma-ray and combined radiations on the thermal decomposition of ammonium perchlorate single crystalsThe thermal decomposition kinetics have been determined for ammonium perchlorate crystals subjected to a fast neutron irradiation or to a fast neutron irradiation followed by a gamma-ray irradiation. Qualitatively, the radiation induced changes are similar to those obtained in this and in previous studies, with samples exposed only to gamma rays. The induction period is shortened and the rate constants, obtained from an Avrami-Erofeyev kinetic analysis, are modified. The acceleratory period constant increases and the decay period constant decreases. When compared on an equal deposited energy basis, the fast neutron induced changes are appreciably larger than the gamma-ray induced changes. Some, or all, of the fast neutron induced effects might be attributable to the introduction of localized regions of concentrated radiation damage ('spikes') by lattice atom recoils which become thermal decomposition sites when the crystals are heated.
Document ID
19740045243
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Herley, P. J.
Wang, C. S.
Varsi, G.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Levy, P. W.
(Brookhaven National Laboratory Upton, N.Y., United States)
Date Acquired
August 7, 2013
Publication Date
March 15, 1974
Publication Information
Publication: Journal of Chemical Physics
Volume: 60
Subject Category
Propellants
Accession Number
74A27993
Distribution Limits
Public
Copyright
Other

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