EFFICIENCIES OF AN SSNTD AND AN ELECTRONIC NEUTRON DOSIMETER WITH THESAME (N,ALPHA) (N,P) CONVERTER

Efficiencies of an SSNTD (solid state nuclear track detector) and an e lectronic neutron dosemeter were studied under the same field of neutr ons when an appropriate (n,alpha) (n,p) converter was used. Characteri stics of each system related to neutron dosimetry were studied. CR-39 was used as the SSNTD. The same characteristics were examined when PIP S (passivated implanted planar silicon) diodes were used as detectors. Both dosimetric systems work with a high and continuous response from thermal up to fast neutron energy range (14 MeV). The angular respons e approaches isodirectional standards. The two systems show good linea rity up to the 10 mSv doses which are used for calibration in the fram e of Eurados joint irradiations. The lowest detectable dose is discuss ed for both neutron dosemeters. This work presents results from on-pha ntom irradiations. Comparing characteristics of the two detection meth ods, the electronic system presents higher sensitivity and response fr om the SSNTD although the whole behaviour of the two systems is very s imilar.