Track theory rested on the foundation of the radial distribution of dose from δ rays as the central contribution of atomic physics to heavy ion radiobiology.Here,a new calculation of the radial distribution of dose i...Track theory rested on the foundation of the radial distribution of dose from δ rays as the central contribution of atomic physics to heavy ion radiobiology.Here,a new calculation of the radial distribution of dose is applied, in which the classical angular distribution of dose of delta rays and a logarithmic polynomial representation of the electron range-energy relation are used,to form the basis of the present thindown calculation.Calculations of inactivation cross sections for heavy ions in the track width regime displaying thindown for E.Colt B/r and Bs-1,and for Bacillus Subtilus are straightforward for these are 1-hit detectors,Calculations for V-79 hamster cells are more complex.They follow the original development of this model for eucaryotic cells,and make use of the cross sections calculated for hypothetical internal targets which are then asserted to be proportional to the measured cellular inactivation cross sections.The results are in reasonable agreement with experimental data.展开更多
The radial distribution of dose around the path of a hemp ion has been studied by a Monte Carlo transport analysis of the delta rays produced along the track of a heavy ion based on classical binary collision dynamics...The radial distribution of dose around the path of a hemp ion has been studied by a Monte Carlo transport analysis of the delta rays produced along the track of a heavy ion based on classical binary collision dynamics and a single scattering model for the electron transport process. Result comparisons among this work and semi-empirical expression based delta ray theory of track structure, as well as other Monte Carlo calculations are made for 1, 3 MeV protons and several heavy ions. The results of the Monte Carlo simulations for energetic heavy ions are in agreement with experimental data and with results of different methods. The characteristic of this Monte Carlo calculation is a simulation of the delta rays theory of track structure.展开更多
Considering the ionizing energy of bound electrons, the energy depositions around the path of an ion whose energy is below 1 MeV/u are calculated by using track structure model. The results are in good agreement with ...Considering the ionizing energy of bound electrons, the energy depositions around the path of an ion whose energy is below 1 MeV/u are calculated by using track structure model. The results are in good agreement with experiments.展开更多
Either sublinear or supralinear responses of dosimeters to y-ray can be described by a response function derived from statistical Poisson distribution.The characteristic parameters of the function determine linearity,...Either sublinear or supralinear responses of dosimeters to y-ray can be described by a response function derived from statistical Poisson distribution.The characteristic parameters of the function determine linearity, sublinearity and supralinearity in their responses. The experimental data of gamma dose-responses of alanine ESR dosimeters,film dosimeters, LiF(Mg, Cu, P) and LiF(Mg, Ti) thermoluminescence dosimeters are used to test the response function.展开更多
文摘Track theory rested on the foundation of the radial distribution of dose from δ rays as the central contribution of atomic physics to heavy ion radiobiology.Here,a new calculation of the radial distribution of dose is applied, in which the classical angular distribution of dose of delta rays and a logarithmic polynomial representation of the electron range-energy relation are used,to form the basis of the present thindown calculation.Calculations of inactivation cross sections for heavy ions in the track width regime displaying thindown for E.Colt B/r and Bs-1,and for Bacillus Subtilus are straightforward for these are 1-hit detectors,Calculations for V-79 hamster cells are more complex.They follow the original development of this model for eucaryotic cells,and make use of the cross sections calculated for hypothetical internal targets which are then asserted to be proportional to the measured cellular inactivation cross sections.The results are in reasonable agreement with experimental data.
文摘The radial distribution of dose around the path of a hemp ion has been studied by a Monte Carlo transport analysis of the delta rays produced along the track of a heavy ion based on classical binary collision dynamics and a single scattering model for the electron transport process. Result comparisons among this work and semi-empirical expression based delta ray theory of track structure, as well as other Monte Carlo calculations are made for 1, 3 MeV protons and several heavy ions. The results of the Monte Carlo simulations for energetic heavy ions are in agreement with experimental data and with results of different methods. The characteristic of this Monte Carlo calculation is a simulation of the delta rays theory of track structure.
基金The Project Supported by National Natural Science Foundation of China
文摘Considering the ionizing energy of bound electrons, the energy depositions around the path of an ion whose energy is below 1 MeV/u are calculated by using track structure model. The results are in good agreement with experiments.
文摘Either sublinear or supralinear responses of dosimeters to y-ray can be described by a response function derived from statistical Poisson distribution.The characteristic parameters of the function determine linearity, sublinearity and supralinearity in their responses. The experimental data of gamma dose-responses of alanine ESR dosimeters,film dosimeters, LiF(Mg, Cu, P) and LiF(Mg, Ti) thermoluminescence dosimeters are used to test the response function.
