GB/T 12164-1999
Reference beta radiations for calibrating dosemeters and doseratemeters and for determining their response as a function of beta radiation energy (English Version)

Standard No.

GB/T 12164-1999

Language

Chinese, Available in English version

Release Date

1999

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2009-04

Replace By

GB/T 12164.1-2008

Latest

GB/T 12164.1-2008

Scope

This standard specifies requirements for beta reference radiation used to calibrate radiation protection level dose (rate) meters1) and determine their energy response. It gives some properties of the radionuclides used to produce beta reference radiation and the structure of the reference source and examples of suitable source structures, describes the remaining maximum beta particle energy and the dose equivalent rate at a depth of 7 mg/cm2 in the ICRU sphere measurement method. The energy involved in the reference radiation ranges from 66keV2) to 3.6MeV, and the dose equivalent rate ranges from about 10μSv/h to 10Sv/h. In addition, for some sources, the variation of the dose equivalent rate as a function of the angle of incidence is given. This standard recommends two series of β reference radiation, which are suitable for the calibration of radiation protection level dose (rate) meters and the determination of their energy responses. Series I is produced by three reference sources of 90Sr+90Y, 204Tl and 147Pm, respectively equipped with beam flattening filters, so that the dose rate has a certain range within a large area perpendicular to the central axis of the radiation beam at a certain distance from the source. Uniformity, the maximum dose equivalent rate generated is approximately 5mSv/h. Series IIβ reference radiation is produced by reference sources 14C, 147Pm, 204T1, 90Sr+90Y and 106Ru+106Rh without flattening filters. This series allows the use of large area planar sources and a range of distances from the source to the calibration location. When closer to the reference source, the dose rate is uniform only over a small area. The energy range and dose rate range of this series of reference sources exceed that of series I, and the maximum dose equivalent rate can reach 10Sv/h.

GB/T 12164-1999 history

• 2008 GB/T 12164.1-2008 Reference beta radiations.Part 1:Methods of production
• 1999 GB/T 12164-1999 Reference beta radiations for calibrating dosemeters and doseratemeters and for determining their response as a function of beta radiation energy