Pregled bibliografske jedinice broj: 1428
Raspodjela frekvencija ionskih parova u ozračenom tkivu
Raspodjela frekvencija ionskih parova u ozračenom tkivu // Zbornik radova Trećeg simpozija Hrvatskog društva za zaštitu od zračenja / Kubelka, Dragan ; Kovač, Jadranka (ur.).
Zagreb: Hrvatsko društvo za zaštitu od zračenja, 1996. str. 265-269 (poster, nije recenziran, cjeloviti rad (in extenso), znanstveni)
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Naslov
Raspodjela frekvencija ionskih parova u ozračenom tkivu
(The frequency distribution of ion pairs in irradiated tissue)
Autori
Obelić, Bogomil ; Srdoč, Dušan
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
Zbornik radova Trećeg simpozija Hrvatskog društva za zaštitu od zračenja
/ Kubelka, Dragan ; Kovač, Jadranka - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 1996, 265-269
Skup
3. Simpozij Hrvatskog društva za zaštitu od zračenja
Mjesto i datum
Zagreb, Hrvatska, 20.11.1996. - 22.11.1996
Vrsta sudjelovanja
Poster
Vrsta recenzije
Nije recenziran
Ključne riječi
mikrodozimetrija; broj ionskih parova; proporcionalni brojač; primarna raspodjela; dekonvolucija; tkivu-ekvivalentni brojač
(microdosimetry; number of ion pairs; proportional counter; primary distribution; deconvolution; tissue equivalent counter)
Sažetak
The statistical distribution of the number of ion pairs per ionizing event in a small volume simulating a tissue sphere was obtained by applying an iterative deconvolution method to experimental spectra measured by exposing a Rossi-type spherical proportional counter to gamma radiation.
The spectrum obtained by a proportional counter is determined by two independent ionization processes: (a) the ionization along the primary track in the counter gas and (b) the multiplication of these primary electrons by the counter. The resulting spectrum, R(E), representing the distribution of the total number of electrons per event, can be represented in a matrix form as R=Q ˇ P. It is a weighted sum of single, double, triple, etc. convolutions of the single electron spectrum [Q(n,E), n=1,2,3...], where the weighting factors P(n) are discrete functions of the primary distribution. The single-electron spectrum which represents the multiplication process follows the Gamma distribution. The primary distribution was obtained by an iterative deconvolution process which discriminates against negative weighting factors (which have no physical meaning). A number of distribution spectra showing the relative frequency of primary ion pairs per event is presented for simulated tissue spheres exposed to 60Co gamma radiation.
Izvorni jezik
Hrvatski
Znanstvena područja
Fizika
