Measures neutronics with detector CZT for acceptance of the access to the bunker of a Linac 15 MV Radiotherapy

After the construction of the bunker and any accelerator installation and prior to start up, be accept built shields from the treatment room to ensure adequate radiation protection during their operation. This acceptance includes the verification of the dose by voltammetry in operation of high energy (15MV) in the labyrinth of access to your computer. The acquisition by the hospital of a specific detector for neutrons represents a cost usually unacceptable, by what is often resort to external entities to obtain doses of the same. The solution in our case it has been using a spectrometer equipped with CZT detector acquired for measurement of Photonic fields, but that has been calibrated for measurement of thermal neutrons, which are those found in the access to the accelerator. In the work are presented the measures carried out and the results obtained. (Author)