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L Van-Ryckeghem

Publications and source records attributed to L Van-Ryckeghem.

2 recordsLinked to original sources
PubMed2005

French comparison exercise with the rotating neutron spectrometer, 'ROSPEC'.

The French laboratories in charge of 'neutron' dosimetry using the spectrometer 'ROSPEC', formed a working group in 2001. The participants began to study the behaviour of the instrument with a comparison exercise in broad energy neutron fields recommended by the International Organisation for Standardisation (ISO) and available at the LMDN in Cadarache. The complete version of the ROSPEC is made up of six spherical proportional counters fixed to a rotating platform. These counters cover different energy ranges which overlap each other to provide a link between the detectors, within the energy range from thermal neutrons to 4.5 MeV. The irradiation configurations chosen were ISO standard sources (252Cf, (252Cf+D2O)(/Cd), 241Am-Be) and the SIGMA facility. The results show that the 'thermal and epithermal' neutron fluence was widely overestimated by the spectrometer in all configurations.

Dose-Response Relationship, Radiation↗
PubMed2004

Inter-laboratory test program (PTI) in 'neutron dosimetry'.

The Laboratory of External Dosimetry Studies and Researches (LRDE), associated laboratory to the Bureau National de Métrologie, is strongly involved in the reference establishment and calibration of instruments in neutron radiation fields provided by 241Am-Be, 252Cf and (252Cf + D2O)/Cd sources. In 1997, on the request of COFRAC, the LRDE has managed an Inter-Laboratory Test Program in 'neutron dosimetry' to compare the different standard calibration methods. The transfer instrument used was a "Harwell Monitor N91". The results of the participant were in good agreement but the associated uncertainties need to be revised by some of laboratories. According to the Mutual Recognition Arrangement signed in 1999, laboratories for metrology will have to assure the traceability of their references. In 2003-2005, the LRDE organises, with National Physical Laboratory (UK) and Physikalisch-Techische Bundesanstalt (Germany), an international comparison in 'neutron dosimetry'. Two transfer instruments, a "2202D" rate metre and a "Harwell Monitor N91", will be sent in turn to the participant laboratories for measurements at their own neutron sources facilities.

Body Burden↗