Energy deposition spectra of simultaneous electron emissions from low energy protons /
15%. This is potentially significant for biology, but
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | 15%. This is potentially significant for biology, but 150, and 200 kev protons. The magnitude of the 50 nm. The frequency-mean lineal energy and the dose- allowed the program to be used to examine the effects atoms sometimes produce two or more electrons calculated in spherical volumes with diameters of 0.5- code was modified to extend its useful energy range complicated than the normal LET/RBE relationship. deposition by protons ranging in energy from 100-250 diameter regardless of the energy of the proton being difficult to measure, and the available data suggests distribution that are due to a single ionization down to 0.10 Mev/nucleon. Another modification to PITS effect at the end of a particle track is more emissions. The Positive Ion Track Structure (PITS) fraction of charge exchange events that lead to increase in these mean values is in the range of 5- increases, these peaks disappear because the indicate that the dose-distribution in lineal energy kev. The resulting spectra of energy imparted (s) were mean lineal energy increased with increasing detector of simultaneous electron emissions on the energy only that they are significant. In order to evaluate particles of similar stopping power that pass through probability of a single ionization occurring in the probably too small to observe with current detector Recent measurements of atomic cross-section indicate sections for the production of simultaneous electron shifted toward higher lineal energies. The smaller simulated. These mean values also increased as the simultaneous electron emissions was increased for 100, simultaneously. However, these cross-sections are site decreases rapidly. sites, 0.5 nm and 1 nm, display peaks in the dose stops within a cell nucleus cannot be predicted from technology. No increase in these mean values occurred that interactions of low energy protons with target The biological effect of a heavy charged particle that ics. the entire cell (Raju et al. 1991). The biological their potential biological consequences, a Monte Carlo track structure simulation was performed utilizing values that may be representative of the cross- with 250 kev protons. The changes in the mean values within the site. As the diameter of the site |
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| Item Description: | "Major subject: Health Physics". Vita. |
| Physical Description: | x, 72 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references (leaves ). |