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Monte Carlo simulation of Auger cascades

Journal Article · · Radiat. Res.; (United States)
DOI:https://doi.org/10.2307/3576938· OSTI ID:5624875
; ;
The energy imparted to biological tissue after the decay of incorporated Auger emitters stems from two sources: (a) energy deposition by the Auger and Coster-Kronig electrons and (b) the charge potential which remains on the multiple ionized atom after the end of the cascade. For the numerical assessment of both the kinetic energy of the released electrons and the charge potential, a new and--for purposes of microdosimetry--precise method is presented. Based on relativistic Dirac-Fock calculations and a rigorous bookkeeping, this method provides a perfect energy balance of the considered atomic system when applied to Monte Carlo simulations of Auger cascades. By comparing the results for charge distribution for krypton and iodine with experimental data and the electron spectrum of /sup 125/I with theoretical data, it can be shown that the approach followed in this work is reasonable and appropriate for the determination of the energy deposited by incorporated Auger emitters in small volumes of condensed matter. The total energy deposited by /sup 125/I in a volume of 20-nm diameter is 2.03 keV which is made up by multiple ionization (1.07 keV) and energy deposition by the emitted Auger electrons (0.96 keV).
Research Organization:
Nuclear Research Center Juelich, Germany, F.R.
OSTI ID:
5624875
Journal Information:
Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 111:3; ISSN RAREA
Country of Publication:
United States
Language:
English

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Related Subjects

560120* -- Radiation Effects on Biochemicals
Cells
& Tissue Culture
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BETA DECAY RADIOISOTOPES
BODY
CHARGED PARTICLES
CHROMATIN
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELECTRONS
ELEMENTARY PARTICLES
ENERGY CASCADE
ENERGY TRANSFER
FERMIONS
INTERMEDIATE MASS NUCLEI
IODINE 125
IODINE ISOTOPES
IONS
ISOTOPES
LEPTONS
MONTE CARLO METHOD
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
SIMULATION
TISSUES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION