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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(11) [November 2012] >
| Title: | Neutron dosimetry around accelerators in Switzerland |
| Authors: | Wernli, C
Hoedlmoser, H
Boschung, M
Hohmann, E
Mayer, S |
| Keywords: | Accelerator
Radiation
Safety
Neutron dosimetry |
| Issue Date: | Nov-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The Radiation Safety
and Security Division of the Paul Scherrer Institute (PSI) operates an
accredited calibration lab for photon and neutron dosimeters and dose rate
monitors as well as an approved dosimetry service for photon and neutron
environmental and personal dosimeters. The reference neutron fields of the
calibration lab are traceable to PTB in Germany and the irradiation conditions
within the room have been studied by MCNPX simulation with and without the
influence of the ISO water slab phantom. Passive dosimetry systems based on
track etch methods are traditional at PSI. For highly sensitive area monitoring,
a fission track detector within a moderator is used and for individual
monitoring CR-39 detectors in various types of badges are in use. Readout of
these detectors is performed by the older Autoscan instruments or by new types
of TASL scanning systems. Optimization programs for etching conditions and
readout procedures are ongoing. Besides internal use at PSI, the dosimetry
group runs the individual neutron dosimetry service for CERN in Geneva and Desy
in Hamburg and further external clients. In addition to the standard
calibration based on reference radiation fields of a 241Am-Be
neutron source the active and passive neutron dosimetry systems are also
calibrated in realistic neutron radiation fields around accelerators. |
| Page(s): | 757-760 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(11) [November 2012]
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