@article{oai:repo.qst.go.jp:00046002, author = {Endo, Satoru and Takada, Masashi and Tanaka, Hiroki and Onizuka, Yoshihiko and Tanaka, Kenichi and Miyahara, Nobuyuki and Baba, Hiromi and Oishi, Ayumu and Ishikawa, Masayori and Hoshi, Masaharu and Kimura, Shinzo and Minematsu, Masakazu and Morimune, Yuki and Kojima, Yasuaki and Shizuma, Kiyoshi and 遠藤 暁 and 高田 真志 and 田中 浩基 and 鬼塚 昌彦 and 宮原 信幸 and 馬場 大海 and 大石 歩 and 星 正治 and 峯松 正和 and 森宗 佑樹 and 静間 清}, issue = {3}, journal = {Radiation and Environmental Biophysics}, month = {Apr}, note = {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 identfy 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 144.98mm, respectively)to cover the SOBP(at 60-125mm depth). The new system can separately determine produced fragments from the incident SOBP carbon beam in a body-simulated phantom.}, pages = {469--475}, title = {Measurement of microdosimetric spectra produced from a 290 MeV/n Spread Out Bragg Peak carbon beam}, volume = {49}, year = {2010} }