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The Ethanol-Chlorobenzene Aerated System as a New High-Level Dosimeter for Routine Measurements; Le Systeme Ethanol-Chlorobenzene Aere Utilise Comme Dosimetre pour les Mesures Courantes de Fortes Doses; Aehrirovannaya sistema ehtanola-khlorobenzola v kachestve novogo dozimetra vysokogo urovnya dlya provedeniya obychnykh izmerenij; Dosimetro de Etanol-Clorobenceno Saturado de Aire para la Determinacion de Intensidades Elevadas

Conference:

Abstract

The radiolytic hydrogen chloride yield for {sup 60}Co gamma radiation measured as a function of dose (0.05 to 100 Mrad), dose-rate (0.5 to 2500 rad sec{sup -1}) and chlorobenzene (CB) concentration is found to be 5 {+-} 0.1 for CB concentrations between 20 and 40% in a broad range of experimental conditions. The yield is only slightly sensitive to normal impurities. Analytical and lower-grade components give yields reproducible within a few per cent of this value if 4% water and about 2X 10{sup -3} M benzene and acetaldehyde or acetone are initially present. Higher dosimetric accuracy is obtained if the exact G(Cl{sup -}) is determined for given materials by calibration with the Fricke dosimeter. With 4% CB and 4 Degree-Sign Inverted-Exclamation-Mark o water all grades of ethanol give G(Cl{sup -}) = 3.65 {+-} 0.05, irrespective of additives. The effect of variation of the water content within {+-} 1% is negligible. The hydrogen chloride concentration in the whole dose range is determined by mercurimetric or alkali- metric titration directly in the irradiated sample with an accuracy of one per cent or better. Incomplete experiments with fast electrons have proved that similar systems are of possible interest for calibration and control of  More>>
Authors:
Dvornik, I.; Zec, U.; Ranogajec, F. [1] 
  1. Institute ''Ruder Boskovic'', Zagreb, Yugoslavia (Croatia)
Publication Date:
Nov 15, 1966
Product Type:
Conference
Report Number:
IAEA-SM-73/15
Resource Relation:
Conference: International Symposium on Food Irradiation, Karlsruhe, Federal Republic of Germany (Germany), 6-10 Jun 1966; Other Information: 10 refs., 3 tabs., 1 fig.; Related Information: In: Food Irradiation. Proceedings of the International Symposium on Food Irradiation| 979 p.
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; 60 APPLIED LIFE SCIENCES; ACCURACY; CALIBRATION; CHLORINE IONS; COBALT 60; CONCENTRATION RATIO; CONTROL; DOSE RATES; DOSEMETERS; DOSES; ELECTRON BEAMS; ELECTRONS; ETHANOL; GAMMA RADIATION; HYDROGEN CHLORIDES; IMPURITIES; IRRADIATION; RADIOLYSIS; TITRATION
OSTI ID:
22118860
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); Food and Agricultural Organization of the United Nations, Rome (Italy)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2024075496
Submitting Site:
INIS
Size:
page(s) 81-90
Announcement Date:
Aug 08, 2013

Conference:

Citation Formats

Dvornik, I., Zec, U., and Ranogajec, F. The Ethanol-Chlorobenzene Aerated System as a New High-Level Dosimeter for Routine Measurements; Le Systeme Ethanol-Chlorobenzene Aere Utilise Comme Dosimetre pour les Mesures Courantes de Fortes Doses; Aehrirovannaya sistema ehtanola-khlorobenzola v kachestve novogo dozimetra vysokogo urovnya dlya provedeniya obychnykh izmerenij; Dosimetro de Etanol-Clorobenceno Saturado de Aire para la Determinacion de Intensidades Elevadas. IAEA: N. p., 1966. Web.
Dvornik, I., Zec, U., & Ranogajec, F. The Ethanol-Chlorobenzene Aerated System as a New High-Level Dosimeter for Routine Measurements; Le Systeme Ethanol-Chlorobenzene Aere Utilise Comme Dosimetre pour les Mesures Courantes de Fortes Doses; Aehrirovannaya sistema ehtanola-khlorobenzola v kachestve novogo dozimetra vysokogo urovnya dlya provedeniya obychnykh izmerenij; Dosimetro de Etanol-Clorobenceno Saturado de Aire para la Determinacion de Intensidades Elevadas. IAEA.
Dvornik, I., Zec, U., and Ranogajec, F. 1966. "The Ethanol-Chlorobenzene Aerated System as a New High-Level Dosimeter for Routine Measurements; Le Systeme Ethanol-Chlorobenzene Aere Utilise Comme Dosimetre pour les Mesures Courantes de Fortes Doses; Aehrirovannaya sistema ehtanola-khlorobenzola v kachestve novogo dozimetra vysokogo urovnya dlya provedeniya obychnykh izmerenij; Dosimetro de Etanol-Clorobenceno Saturado de Aire para la Determinacion de Intensidades Elevadas." IAEA.
@misc{etde_22118860,
title = {The Ethanol-Chlorobenzene Aerated System as a New High-Level Dosimeter for Routine Measurements; Le Systeme Ethanol-Chlorobenzene Aere Utilise Comme Dosimetre pour les Mesures Courantes de Fortes Doses; Aehrirovannaya sistema ehtanola-khlorobenzola v kachestve novogo dozimetra vysokogo urovnya dlya provedeniya obychnykh izmerenij; Dosimetro de Etanol-Clorobenceno Saturado de Aire para la Determinacion de Intensidades Elevadas}
author = {Dvornik, I., Zec, U., and Ranogajec, F.}
abstractNote = {The radiolytic hydrogen chloride yield for {sup 60}Co gamma radiation measured as a function of dose (0.05 to 100 Mrad), dose-rate (0.5 to 2500 rad sec{sup -1}) and chlorobenzene (CB) concentration is found to be 5 {+-} 0.1 for CB concentrations between 20 and 40% in a broad range of experimental conditions. The yield is only slightly sensitive to normal impurities. Analytical and lower-grade components give yields reproducible within a few per cent of this value if 4% water and about 2X 10{sup -3} M benzene and acetaldehyde or acetone are initially present. Higher dosimetric accuracy is obtained if the exact G(Cl{sup -}) is determined for given materials by calibration with the Fricke dosimeter. With 4% CB and 4 Degree-Sign Inverted-Exclamation-Mark o water all grades of ethanol give G(Cl{sup -}) = 3.65 {+-} 0.05, irrespective of additives. The effect of variation of the water content within {+-} 1% is negligible. The hydrogen chloride concentration in the whole dose range is determined by mercurimetric or alkali- metric titration directly in the irradiated sample with an accuracy of one per cent or better. Incomplete experiments with fast electrons have proved that similar systems are of possible interest for calibration and control of industrial irradiations with intense electron beams. The simplicity of preparation and analysis together with the broad range (covered by only one analytical method) and high overall accuracy give to the new dosimeter all the qualities of the almost unique tool for dosimetric calibration of sources and routine control of industrial radiation processing. (author) [French] On constate que la quantite d'acide chlorhydrique radiolytique produite par des rayons gamma emis par le {sup 60}Co, mesuree en fonction de la dose (0,05 a 100 Mrad), du debit de dose (0,5 a 2500 rad-s{sup -1}) et de la concentration du chlorobenzene (CB), est de 5 {+-} 0,1 pour des concentrations de CB comprises entre 20 et 40% dans un tres large eventail de conditions experimentales. Ce rendement n'est que legerement sensible aux impuretes normales. Avec des composants de purete analytique et moindre, on obtient des rendements reproductibles compris dans une gamme de quelques pour cent de cette valeur en presence de 4% d'eau et de benzene et d'acetaldehyde ou d'acetone 2 * 10{sup -3} M. On obtient une plus grande precision dosimetrique en determinant exactement G(C1{sup )} pour des matieres donnees par etalonnage au moyen du dosimetre de Fricke. Avec 4 Degree-Sign )o de CB et 4% d'eau, toutes les qualites d'ethanol donnent G(Cl{sup -}) = 3,65 {+-} 0,05 quels que soient les adjuvants utilises. L'effet des variations de la teneur en eaii comprises entre {+-} 1 % est negligeable. On determine directement la concentration de l'acide chlorhydrique dans toute la gamme correspondant a la dose par un titrage mercurimetrique ou alcalimetrique dans l'echantillon irradie, avec une precision egale ou superieure a 1%. Des experiences incompletes avec des electrons rapides ont prouve que des systemes semblables pourraient etre interessants pour etalonner et mesurer des irradiations industrielles utilisant des faisceaux d'electrons intenses. La simplicite de la. preparation et de l'analyse, ainsi que la tres grande precision en general, font de ce nouveau dosimetre aux multiples qualites un instrument presque unique en son genre pour le calibrage dosimetrique des sources et la mesure courante des irradiations intervenant dans les procedes industriels. (author) [Spanish] El rendimiento en HCl obtenido por radiolisis mediante los rayos gamma del {sup 60}Co, expresado en funcion de. la dosis (0,05 a 100 Mrad), de la intensidad de dosis (0,5a 2500 rad s{sup -1}) y de la concentracion del clorobenceno (CB), es 5 {+-} 0,1 para concentraciones de Cb comprendidas entre 20 y 40% en condiciones experimentales muy diversas. Este rendimiento solo se altera ligeramente con las impurezas corrientes. Los componentes de pureza analitica e inferior dan resultados reproducibles, con ligeros porcentajes de desviacion respecto de este valor, anadiendo al principio de la operacion 4% de agua y 2 * 10{sup -3} M, aproximadamente, de benceno y acetaldehfdo o acetona. La exactitud de las mediciones es mayor si se determina el valor exacto de G(Cl{sup -}) para cada material por calibracion con el dosimetro de Fricke, con 4% de CB y 4% de agua todas las variedades de etanol dan G(Cl{sup -}) = 3,65 {+-} 0,05, con independencia de los aditivos. El efecto de la variacion del contenido de agua en {+-} 1% es insignificante. La concentracion del HC1 en todo el intervalo de dosis se puede determinar por valoracion mercurometrica o alcalimetrica directa de la muestra irradiada con un error maximo del 1%. Experimentos con neutrones rapidos, todavia en curso, demuestran que podria emplearse mezclas similares para calibrar y controlar irradiaciones industriales con haces electronicos intensos. La sencillez de la preparacion y del analisis junto con el amplio intervalo que se cubre con este solo metodo y con su elevada precision, hacen que el nuevo dosimetro sea uno de los mas eficaces para calibrar fuentes radiactivas y controlar procesos industriales de irradiacion. (author) [Russian] Obnaruzheno, chto vyhod radioliticheskogo hloristogo vodoroda dlja gamma-izluchenija kobal'ta-60, izmerennogo v kachestve funkcii dozy (0,05 - 100 Mrad), moshhnosti dozy (0,5 - 2500 rad/sek{sup 1}) i koncentracii hlorobenzola (HB), sostavljaet 5 {+-}0,1 dlja koncentracii HB 20-40% v shirokom diapazone jeksperimental'nyh uslovij. Ukazannyj vyhod ochen' malo zavisit ot obychnyh zagrjaznenij. Komponenty analiticheskoj chistoty i nizhe dajut vyhody, kotorye mogut byt' vosproizvedeny v predelah neskol'kih procentov jetoj velichiny, esli pervonachal'no imeetsja 4% vody i okolo 2*10{sup -3} M benzola i acetal'degida ili acetona. Bolee vysokuju dozimetricheskuju tochnost' mozhno poluchit' v tom sluchae, esli opredelit' tochno G(C1' ) dlja dannyh materialov putem kalibrovki po dozimetru Frike. Pri 4% HB i 4% vody jetilovyj spirt vseh stepenej chistoty daet G(C1') =3,65{+-}0,05 nezavisimo ot prisadok. Jeffekt izmenenija soderzhanija vody v predelah {+-}1% javljaetsja ochen' neznachitel'nym. Koncentracija hloristogo vodoroda vo vsem intervale dozy opredeljaetsja rtutnometricheskim ili alkalimetricheskim titrovaniem neposredstvenno v obluchennom obrazce s tochnost'ju do 1% ili vyshe. Nezakonchennye jeksperimenty s bystrymi jelektronami pokazali, chto analogichnye sistemy mogut predstavljat' interes dlja kalibrovki i kontrolja promyshlennogo obluchenija intensivnymi jelektronnymi puchkami. Prostota podgotovki i analiza, a takzhe shirokij diapazon (ohvatyvaemyj tol'ko odnim analiticheskim metodom) i vysokaja obshhaja tochnost' pridajut novomu dozimetru vse kachestva pochti unikal'nogo instrumenta dlja dozimetricheskoj kalibrovki istochnikov i obychnogo kontrolja za promyshlennoj radiacionnoj obrabotkoj. (author)}
place = {IAEA}
year = {1966}
month = {Nov}
}