Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2011-06-21
2011-06-21
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
Reexamination Certificate
active
07964851
ABSTRACT:
A method of spectrometric photon dosimetry for integrally and nuclide-specifically determining a gamma dose rate for X-ray and gamma radiation. The method includes measuring a spectrum in at least one energy group or at least one interval group. The pulse height distribution is with a spectrometer and a pulse height analyzer. The number of channels of the spectrometer is such that a map of the pulse height distribution at a requisite resolution over an energy can be made. The measured pulse height distribution is converted into a photon spectrum using a deconvolution procedure that uses response functions having the same energy resolution as the pulse height distribution. The dose spectrum is calculated using dose conversion factors that are energy-dependent and related to the mean energy of a respective corresponding energy interval. The integral dose or dose rate is determined by summing the dose spectrum. The spectrometer is switched to a low-resolution mode of operation in order to ascertain an integral dose rate and switched to a high-resolution mode of operation in order to analyze radiation sources for which nuclides that cause higher dose rates are to be identified.
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GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
Leydig , Voit & Mayer, Ltd.
Malevic Djura
Porta David P
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