title: Measurement of microdosimetric spectra produced from a 290 MeV/n Spread Out Bragg Peak carbon beam.
abstract: This study describes measurements on secondary particles produced by a 290 MeV/n Spread Out Bragg Peak (SOBP) carbon beam. Microdosimetric distributions of secondary fragments from the SOBP carbon beam have been measured by using a new tissue equivalent proportional counter (TEPC) system at the Heavy Ion Medical Accelerator in Chiba of the National Institute of Radiological Sciences. The new TEPC system consists of a TEPC, two solid-state detectors (SSD) and a scintillation counter (FSC: forward scintillation counter). The SSDs and FSC can separately identify charged fragments and secondary neutrons produced by the incident carbon ions. Microdosimetric distributions were measured for secondary particles including neutrons produced by a body-simulated phantom consisting of various PMMA plates (thickness: 0, 34.81, 55.2, 60.95, 64.83, 95.03, 114.79, 124.69, 135.2 and 144.98 mm, respectively) to cover the SOBP (at 60-125 mm depth). The new system can separately determine produced fragments from the incident SOBP carbon beam in a body-simulated phantom.
authors.affiliation: Quantum Energy Applications, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan. endos@hiroshima-u.ac.jp
authors.forename: Satoru
authors.initials: S
authors.lastname: Endo
authors.forename: Masashi
authors.initials: M
authors.lastname: Takada
authors.forename: Hiroki
authors.initials: H
authors.lastname: Tanaka
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Onizuka
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tanaka
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Miyahara
authors.forename: Hiromi
authors.initials: H
authors.lastname: Baba
authors.forename: Ayumu
authors.initials: A
authors.lastname: Oishi
authors.forename: Masayori
authors.initials: M
authors.lastname: Ishikawa
authors.forename: Masaharu
authors.initials: M
authors.lastname: Hoshi
authors.forename: Shinzo
authors.initials: S
authors.lastname: Kimura
authors.forename: Masakazu
authors.initials: M
authors.lastname: Minematsu
authors.forename: Yuki
authors.initials: Y
authors.lastname: Morimune
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Kojima
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Shizuma
mesh_terms: D002244:Carbon; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D013057:Spectrum Analysis
chemical_list: D002244:Carbon
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