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A study of build-up effects in high-energy radiation fields using a TEPC

Abstract

A dose of 2 mSv close to the body surface of a pregnant woman is considered by ICRP to assure a dose limit of 1 mSv to the foetus. Such an assumption depends on the energy spectrum and composition of the external radiation field and it was tested in radiation fields containing high-energy particles similar to those found around high-energy particle accelerators and in air-craft. Measurements of dose and dose equivalent were performed as a function of wall thickness using a tissue-equivalent proportional counter (TEPC) in radiation fields at the CERN-EU Reference Radiation Facility. Results are presented both with respect to integral quantities and event size spectra. The decrease in dose and dose equivalent at a depth equivalent to that of the foetus was typically 10% in a high-energy stray radiation field and in the case of PuBe source neutrons amounted to only 30%. It is concluded that it would be prudent under such exposure conditions to limit the dose of a pregnant woman to 1 mSv in order to assure that the dose to the foetus remains below the same limit. (author)
Authors:
Hoefert, M; Stevenson, G R; [1]  Aroua, A; [2]  Sannikov, A V [3] 
  1. CERN, European Laboratory for Particle Physics, Geneva (Switzerland)
  2. IAR, Institute for Applied Radiophysics, Lausanne (Switzerland)
  3. IHEP, Institute for High-Energy Physics, Protvino (Russian Federation)
Publication Date:
Sep 04, 1995
Product Type:
Technical Report
Report Number:
CERN/TIS-RP-95-14/CF
Reference Number:
EDB-00:109065
Resource Relation:
Conference: 10. international congress of radiation research, Wuerzburg (Germany), 27 Aug - 1 Sep 1995; Other Information: 6 refs, 4 figs; PBD: 4 Sep 1995
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; ACCELERATORS; DOSE LIMITS; FETUSES; ICRP; PREGNANCY; RADIATION DOSES; RADIATION PROTECTION; TISSUE-EQUIVALENT DETECTORS; TISSUE-EQUIVALENT MATERIALS
OSTI ID:
20058937
Research Organizations:
European Organization for Nuclear Research (CERN), European Laboratory for Particle Physics, Geneva (Switzerland)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: Contract FI3P-CT92-0026; TRN: XA00XC014020947
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
11 pages
Announcement Date:

Citation Formats

Hoefert, M, Stevenson, G R, Aroua, A, and Sannikov, A V. A study of build-up effects in high-energy radiation fields using a TEPC. IAEA: N. p., 1995. Web.
Hoefert, M, Stevenson, G R, Aroua, A, & Sannikov, A V. A study of build-up effects in high-energy radiation fields using a TEPC. IAEA.
Hoefert, M, Stevenson, G R, Aroua, A, and Sannikov, A V. 1995. "A study of build-up effects in high-energy radiation fields using a TEPC." IAEA.
@misc{etde_20058937,
title = {A study of build-up effects in high-energy radiation fields using a TEPC}
author = {Hoefert, M, Stevenson, G R, Aroua, A, and Sannikov, A V}
abstractNote = {A dose of 2 mSv close to the body surface of a pregnant woman is considered by ICRP to assure a dose limit of 1 mSv to the foetus. Such an assumption depends on the energy spectrum and composition of the external radiation field and it was tested in radiation fields containing high-energy particles similar to those found around high-energy particle accelerators and in air-craft. Measurements of dose and dose equivalent were performed as a function of wall thickness using a tissue-equivalent proportional counter (TEPC) in radiation fields at the CERN-EU Reference Radiation Facility. Results are presented both with respect to integral quantities and event size spectra. The decrease in dose and dose equivalent at a depth equivalent to that of the foetus was typically 10% in a high-energy stray radiation field and in the case of PuBe source neutrons amounted to only 30%. It is concluded that it would be prudent under such exposure conditions to limit the dose of a pregnant woman to 1 mSv in order to assure that the dose to the foetus remains below the same limit. (author)}
place = {IAEA}
year = {1995}
month = {Sep}
}