Published 1975 | Version v1
Journal article Metadata-only

Study of gamma radiolysis and annealing reactions of radiolytic products in sodium ethylenediaminetetraacetate Co(III) crystals

Creators

  • 1. National Tsing Hua Univ., Hsinchu (Taiwan). Inst. of Nuclear Science

Description

Radiolytic decomposition of crystalline sodium ethylenediaminetetraacetatocobaltate(III) was studied as a function of absorbed dose under various irradiation temperatures and ambient atmospheres. The isothermal annealing of the irradiated crystal was also investigated. Remarkable differences in the radiolytic behavior were observed for crystals irradiated under different ambient atmospheres. The yield curve of crystals irradiated in air was found to increase linearly with increasing absorbed dose up to a very high dose (> 108 rads); whereas a rather complicated nonlinear relationship was observed for crystals irradiated in vacuo. The interesting ambient gas effect was observed also in the isothermal annealing study, which is similar to that found in the nuclear recoil study. Temperature dependence of the radiolysis was examined from -780C to +800C. It was found that the radiolysis at -780C was substantially lower than other irradiation temperatures. The possible radiation decomposition processes in target crystals are discussed. (orig.)

Abstract (German)

An kristallinem Na-EDTA-Kobaltat(III) wurde die radiolytische Zerstoerung als Funktion der Dosis, der Temperatur und der umgebenden Atmosphaere studiert. Das radiolytische Verhalten haengt stark von der Atmosphaere ab; bis zu > 108 rad ergibt sich in Luft lineare Dosisabhaengigkeit, waehrend im Vakuum ein komplizierter Zusammenhang gefunden wird. Eine andere Abhaengigkeit zeigt sich bei Ausheilungsversuchen, die mit Ergebnissen von Rueckstossversuchen in Einklang steht. Die Pruefung der Temperaturabhaengigkeit (-780 bis + 800C) ergab geringste Radiolyse bei -780C. Moegliche Zersetzungsprozesse werden diskutiert. (orig.)

Additional details

Identifiers

DOI
10.1524/ract.1975.22.4.166;

Publishing Information

Journal Title
ract
Journal Volume
22
Journal Issue
4
Series
Radiochim. Acta.
Journal Page Range
166-172
ISSN
2193-3405

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
7272566
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Descriptors DEI
ANNEALING; CHEMICAL ANALYSIS; COBALT COMPLEXES; COBALT 60; COMPARATIVE EVALUATIONS; CRYSTALS; DOSE RATES; EDTA; ELECTROPHORESIS; GAMMA RADIATION; HOT ATOM CHEMISTRY; INFRARED SPECTRA; ION EXCHANGE; IRRADIATION; LABELLED COMPOUNDS; RADIATION DOSES; RADIOLYSIS; TEMPERATURE DEPENDENCE
Descriptors DEC
AMINO ACIDS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBOXYLIC ACIDS; CHELATING AGENTS; CHEMICAL RADIATION EFFECTS; CHEMICAL REACTIONS; CHEMISTRY; COBALT ISOTOPES; COMPLEXES; DECOMPOSITION; ELECTROMAGNETIC RADIATION; HEAT TREATMENTS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTO; IONIZING RADIATIONS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MINUTES LIVING RADIOISOTOPES; NUCLEI; ODD-ODD NUCLEI; ORGANIC ACIDS; ORGANIC COMPOUNDS; RADIATION EFFECTS; RADIATIONS; RADIOACTIVE MATERIALS; RADIOCHEMISTRY; RADIOISOTOPES; SPECTRA; TRANSITION ELEMENT COMPLEXES; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
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