Response characteristics of neutron survey instruments

摘要

Neutron Laboratory (LN) is an integrant of the National Laboratory of Ionising Radiation MetrologyLNMRI/IRD has as one of its attributions the calibration of neutron survey meters used in radioprotection. Theseinstruments are important tools for monitoring doses to individuals in the workplace. They are used routinely todetermine the dose rates in areas where persons may be occupationally exposed. Aiming the procedures of thelaboratory with the international practicals and contribute so that the country pass to adopt the ambient doseequivalent uniquely for most survey meters, the LN intends to initiate the calibration of all those meters in thisnew quantity. For this it becomes necessary a study of the response of the survey meters projected for MADEwhen calibrated in the new quantity, allowing, this way, to define which instrument models the calibration inambient dose equivalent will be possible. As part of this study were made experimental measurements withradionuclides sources (~(241)AmBe and ~(252)Cf) to test the response instruments characteristics. These neutron sourceswere used to produce standard fields as recommended by ISO. The most used neutron survey meter model inBrazil was tested and your response energy and angle dependence were analised .