Comparison of extrapolation chamber measurements of the absorbed dose rate for beta radiation between VNIIM (Russia) and PTB (Germany)

Autor:	P Ambrosi, E Rumyantseva, S. Fedina, V Fominych, J Böhm, K. Helmstädter
Rok vydání:	2004
Předmět:	Physics medicine.medical_specialty business.industry Radiochemistry General Engineering Extrapolation Radiation Metrology Primary standard Absorbed dose Calibration medicine Dosimetry Medical physics Radiation protection business
Zdroj:	Metrologia. 41:06008-06008
ISSN:	1681-7575 0026-1394
Popis:	A comparison of absorbed dose rates, t(0.07), in tissue at radiation protection levels for beta dosimetry was performed between two national laboratories, the D I Mendeleyev Institute for Metrology (VNIIM) in St Petersburg (Russia) and the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig (Germany), in 1999 and 2001 using flat ionization chambers as transfer standards. The dose rates were determined at the calibration distances by measurements with the primary standard measuring devices of VNIIM and PTB with extrapolation chambers to realise the unit of absorbed dose rate to tissue for beta radiation. In the two steps reported on here, transfer chambers of VNIIM and PTB were calibrated in beta radiation reference fields at VNIIM and at PTB. The values of the calibration factors for the flat ionization chambers agreed within ±2% for 90Sr/90Y, 85Kr and 204Tl and ±4% for 147Pm beta radiation. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by EUROMET, according to the provisions of the Mutual Recognition Arrangement (MRA).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a995228c6d9dae113f88717f5d2a9431 https://doi.org/10.1088/0026-1394/41/1a/06008 Zobrazit plný text záznamu