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Wieser, A. ; Regulla, D.F.

ESR dosimetry in the 'gigarad' range.

Appl. Radiat. Isot. 40, 911-913 (1989)
DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
ESR spectroscopy of radiation induced free radicals in organic and inorganic solids has recently been accepted for photon dosimetry in the high-level dose range. With alanine as the commonly used dosimetric material, the ESR spectroscopy has proven reliable applicability for doses up to 0.5 MGy irradiation and storage temperatures up to 50°C. The upper detection limit is given by effects of saturation, respectively thermal instability of the radiation induced paramagnetic centres. For most solid materials saturation of the paramagnetic centres is reached at dose levels below or equal to 1 MGy. It was the subject of the present study to develop a dosimetric procedure that (a) allows for dosimetry at dose levels between, at least, 0.01 MGy and 0.1 GGy, (b) operates at irradiation temperature levels up to 250°C, and (c) is able to integrate the radiation dose over periods of up to 5 y. Among the different crystalline and amorphous materials investigated, crystalline quartz was found to match best the requirements. It is the E1' centre in quartz that could be shown not to saturate up to absorbed doses of at least 50 MGy, and provide thermal stability up to at least 200°C for long periods of irradiation time. | ESR spectroscopy of radiation induced free radicals in organic and inorganic solids has recently been accepted for photon dosimetry in the high-level dose range. With alanine as the commonly used dosimetric material, the ESR spectroscopy has proven reliable applicability for doses up to 0.5 MGy irradiation and storage temperatures up to 50°C. The upper detection limit is given by effects of saturation, respectively thermal instability of the radiation induced paramagnetic centres. For most solid materials saturation of the paramagnetic centres is reached at dose levels below or equal to 1 MGy. It was the subject of the present study to develop a dosimetric procedure that (a) allows for dosimetry at dose levels between, at least, 0.01 MGy and 0.1 GGy, (b) operates at irradiation temperature levels up to 250°C, and (c) is able to integrate the radiation dose over periods of up to 5y.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
ISSN (print) / ISBN 0969-8043
e-ISSN 1872-9800
Zeitschrift Applied Radiation and Isotopes
Quellenangaben Band: 40, Heft: 10-12, Seiten: 911-913 Artikelnummer: , Supplement: ,
Verlag Elsevier
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Departments & Institutes