Published 1977 | Version v1
Miscellaneous Open

Contribution to clinical dosimetry of californium 252 sources used at Gustave Roussy institute

Creators

Description

The main characteristics of californium 252 sources are presented in the first part of the report. Dose measurements around Californium sources were performed with a pair of ionization multiplication chambers: the first one has an Aluminium wall and is filled with Argon, the second one a plastic tissue-equivalent gas. A set of experiments was performed in order to investigate the relative influence of beta rays on the response of both chambers. Besides the experimental work a computer program was written to calculate the dose distribution around the actual sources made of a series of small active sources placed in catheters. Theoretical data around small sources can be found in the litterature. The comparison between experimental results and theoretical ones has shown a good agreement. The computer program will be included as a sub-routine in the more general computer program used for patients treated with interstitial therapy

Availability note (English)

MF available from INIS under the Report Number.

Abstract (French)

Apres avoir rappele les caracteristiques essentielles du 252Cf, ce travail a consiste en deux parties distinctes: La dosimetrie pratique des sources de 252Cf a ete faite par la methode des deux chambres d'ionisation a multiplication: l'une avec des parois en aluminium et une circulation de gaz argon et l'autre avec des parois en plastique equivalent-tissu. Une serie d'experiences a d'autre part permis d'estimer la part relative des particules β dans les reponses des deux chambres d'ionisation; la dosimetrie theorique a consiste en l'elaboration d'un programme de calcul permettant de passer des valeurs de doses autour d'une source elementaire qui se trouvent dans la litterature, aux valeurs de doses autour d'un porte-source contenant plusieurs sources elementaires. Les resultats experimentaux sont en bon accord avec les resultats theoriques. Le programme d'ordinateur ecrit, constituera un sous-programme du programme general de calcul des doses en curie-therapie utilise pour les malades de l'Institut Gustave Roussy

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Additional details

Additional titles

Original title (French)
Contribution a la dosimetrie clinique des sources de californium 252 employees a l'institut Gustave Roussy

Publishing Information

Imprint Pagination
114 p.
Report number
FRNC-TH--746

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
11517802
Subject category
S07: ISOTOPES AND RADIATION SOURCES; S61: RADIATION PROTECTION AND DOSIMETRY;
Resource subtype / Literary indicator
Numerical Data, Thesis
Descriptors DEI
BETA DOSIMETRY; CALIFORNIUM 252; DEPTH DOSE DISTRIBUTIONS; EXPERIMENTAL DATA; GAMMA DOSIMETRY; GRAPHS; IONIZATION CHAMBERS; ISODOSE CURVES; NEUTRON DOSIMETRY; PHANTOMS; POLYSTYRENE; RADIATION SOURCES; RADIOTHERAPY; TABLES; TISSUE-EQUIVALENT MATERIALS
Descriptors DEC
ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; CALIFORNIUM ISOTOPES; DATA; DATA FORMS; DOSIMETRY; EVEN-EVEN NUCLEI; HEAVY NUCLEI; INFORMATION; ISOTOPES; MEASURING INSTRUMENTS; MEDICINE; MOCKUP; NUCLEI; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC POLYMERS; POLYMERS; POLYOLEFINS; POLYVINYLS; RADIATION DETECTORS; RADIATION DOSE DISTRIBUTIONS; RADIOISOTOPES; SPATIAL DOSE DISTRIBUTIONS; STRUCTURAL MODELS; THERAPY; YEARS LIVING RADIOISOTOPES