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Spatial fragmentdistribution from atherapeuticpencil-like carbonbeam in water Naruhiro MatsufujiMasataka KomoriHitomi Sasaki2005 год

Spatial fragment distribution from a therapeutic pencil-like carbon beam in water
статья из журнала

Страница публикацииПубликация в OpenAlex
Аннотация: The latest heavy ion therapy tends to require information about the spatial distribution of the quality of radiation in a patient's body in order to make the best use of any potential advantage of swift heavy ions for the therapeutic treatment of a tumour. The deflection of incident particles is described well by Molière's multiple-scattering theory of primary particles; however, the deflection of projectile fragments is not yet thoroughly understood. This paper reports on our investigation of the spatial distribution of fragments produced from a therapeutic carbon beam through nuclear reactions in thick water. A DeltaE-E counter telescope system, composed of a plastic scintillator, a gas-flow proportional counter and a BGO scintillator, was rotated around a water target in order to measure the spatial distribution of the radiation quality. The results revealed that the observed deflection of fragment particles exceeded the multiple scattering effect estimated by Molière's theory. However, the difference can be sufficiently accounted for by considering one term involved in the multiple-scattering formula; this term corresponds to a lateral 'kick' at the point of production of the fragment. This kick is successfully explained as a transfer of the intra-nucleus Fermi momentum of a projectile to the fragment; the extent of the kick obeys the expectation derived from the Goldhaber model.
Год издания: 2005
Авторы: Naruhiro Matsufuji, Masataka Komori, Hitomi Sasaki, Kengo Akiu, Masako Ogawa, Akifumi Fukumura, E. Urakabe, Taku Inaniwa, Teiji Nishio, Toshiyuki Kohno, Tatsuaki Kanai
Издательство: IOP Publishing
Источник: Physics in Medicine and Biology
Ключевые слова: Radiation Therapy and Dosimetry, Nuclear Physics and Applications, Radiation Detection and Scintillator Technologies
Другие ссылки: Physics in Medicine and Biology (HTML)
PubMed (HTML)