DEVELOPMENT OF A NEW SECONDARY STANDARD FOR H*(10).

Abstract:

:A secondary standard for ambient dose equivalent, H*(10), is necessary for the dissemination of the unit Sievert (Sv), but there is no such standard commercially available currently. Furthermore, the measurement of H*(10) instead of calculating H*(10) from air kerma and conversion coefficients is needed for unknown radiation fields. We developed a prototype of a new secondary standard for H*(10) based on a spherical 1 l ionization chamber for air kerma. This chamber was modified with copper wires at the inner surface to adjust the response of the chamber according to H*(10). Additionally, a Makrolon shell and an aluminium coating were added to optimize the response at energies below 50 keV. The prototype fulfils the requirements given in ISO 4037-2 in the energy range from 12 keV to 7 MeV. In combination with an electrometer, it can be used as area dosemeter, suitable for pulsed fields and for low energy radiation.

journal_name

Radiat Prot Dosimetry

authors

Bairlein K,Behnke B,Hupe O

doi

10.1093/rpd/ncz296

subject

Has Abstract

pub_date

2020-06-24 00:00:00

pages

378-382

issue

3

eissn

0144-8420

issn

1742-3406

pii

5748390

journal_volume

188

pub_type

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