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Lauzacco, Italy

Caresana M.,Polytechnic of Milan | Ferrarini M.,CNAO Fondazione | Parravicini A.,Mi.Am Srl | Sashala Naik A.,Polytechnic of Milan | Sashala Naik A.,Mi.Am Srl
Radiation Measurements | Year: 2014

A passive neutron dosimeter based on CR-39 track detectors has been successfully tested at the CERF facility at CERN. Former calibration campaigns in monoenergetic and quasi-monoenergetic neutron beams have shown an almost energy independent response function of the detector in the energy range 0.5 MeV-100 MeV. This feature allows to obtain a "rem counter like" personal neutron detector, where a single calibration coefficient is valid for a wide energy range. In order to confirm his feature the detector has been tested in the CERF facility at CERN that generates a workplace neutron field similar to the one encountered at commercial flight altitude. The results show a very good agreement with the reference value permitting to conclude that the detectors have a good reliability also for this kind of radiation field. © 2014 Elsevier Ltd. All rights reserved. Source


Caresana M.,Polytechnic of Milan | Ferrarini M.,CNAO Fondazione | Parravicini A.,Mi.Am Srl | Sashala Naik A.,Polytechnic of Milan | Sashala Naik A.,Mi.Am Srl
Radiation Measurements | Year: 2014

Rem-Counters are widely used in radiation protection practice for environmental neutron detection. They are usually based on both an active and a passive thermal neutron detector surrounded by a hydrogenate moderator designed to obtain a response function as close as possible to the H*(10) curve. Inclusion of high Z material is also used to extend the response function up to 1GeV of neutron energy. Recently a dual detector Rem-Counter, both active and passive, was proposed by Agosteo etal. (2010). The present paper focuses on the passive version that is based on a CR-39 track detector coupled to an enriched 10B converter. A technique was developed for the track analysis based on the measurement of the mean LET of the charged particles produced by the neutron reaction on 10B that has proven to be very effective in the background reduction. Moreover the simulated response function of the Rem-Counter was compared with the experimental results obtained with irradiations carried out with monoenergetic neutron beams, showing a quite good agreement. © 2014 Elsevier Ltd. Source

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