Neutron dose distribution at the GSI fragment separator.

Abstract:

:GSI is operating a facility for the production of rare isotopes. Nuclei are produced by fragmentation or fission of the impinging heavy ions with energies of approximately 1 GeV per nucleon. The major part of the primary beam and the produced nuclei is deposited in the components of the Fragment Separator (FRS) and generates neutron radiation. Thermoluminescence dosemeters (TLDs) (6LiF/7LiF pairs in PE spheres) were exposed in neutron fields produced by uranium beams with energies between 100 and 1000 MeV per nucleon during an irradiation period in the year 2002. Two-dimensional dose distributions are obtained using these TL measurements in combination with model calculations. The applied model describes the dose distribution as a superposition of dose patterns of 20 single sources equally distributed along the FRS. The single source distribution is based on a measured double differential neutron distribution for a 1 GeV per nucleon uranium beam.

journal_name

Radiat Prot Dosimetry

authors

Fehrenbacher G,Festag JG

doi

10.1093/rpd/nch210

keywords:

subject

Has Abstract

pub_date

2004-01-01 00:00:00

pages

739-42

issue

1-4

eissn

0144-8420

issn

1742-3406

pii

110/1-4/739

journal_volume

110

pub_type

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