AI Article Synopsis
- The study measured energy deposition patterns in tiny volumes using a special counter for various proton beam energies and spreads.
- Different sizes of simulated spherical volumes (0.6 to 2.00 micrometers) were analyzed to determine how energy deposition changes based on pathlength, beam energy, and energy spread.
- Findings indicated that for proton energies between 8-31 MeV, the energy distributions were skewed with a longer tail on the higher energy side, revealing distinct behaviors for degraded beams compared to monoenergetic beams.
Article Abstract
The frequency distributions of energy deposition in microscopic volumes for proton beams of various energies and energy spreads were determined by means of a "rossi type" proportional counter. Tissue equivalent spherical volumes of 0.6, 0.72, 0.80, 1.00, 1.25, 1.50, 1.75, 2.00 micrometer diameter were simulated. Frequency distributions of energy deposition per unit pathlength are reported and their behavior as a function of the simulated pathlength, beam energy and energy spread is discussed. The results indicate that energy deposition distributions in microscopic volumes for protons in the range 8-31 MeV are skewsymmetric distributions with a tail on the high energy side, and that degraded beams behave differently from monoenergetic ones. Dose mean lineal energy values have been quoted for beams used in radiobiological experiments.
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| http://dx.doi.org/10.1007/BF01324224 | DOI Listing |
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