Patent ID: 7964851

Claim:
A method of spectrometric photon dosimetry for integrally and nuclide-specifically determining a gamma dose rate for X-ray and/or gamma radiation, comprising: measuring a pulse height distribution with a first detector of a spectrometer and a pulse height analyzer, the spectrometer having a number of channels operable to map the pulse height distribution at a requisite resolution over an energy range, the spectrometer being set to a low-resolution mode of operation; converting the measured pulse height distribution into a photon spectrum using a deconvolution procedure including a matrix inversion, the deconvolution procedure using response functions having a same energy resolution as the pulse height distribution; calculating a dose spectrum using dose conversion factors, the dose conversion factors being energy-dependent and each related to a mean energy of a respective corresponding energy interval; determining at least one of an integral dose and a dose rate by summing the dose spectrum; operating the spectrometer in the high-resolution mode of operation with the first detector so as to measure a pulse height so as to analyze a radiation sources for which a nuclides that causes a high dose or dose rates is to be identified.