@article{oai:repo.qst.go.jp:00047012,
 author = {L., Collums Tyler and R., Islam Mohammad and R., Benton Eric and Zheng, Yuanshui and Uchihori, Yukio and Yasuda, Nakahiro and Kitamura, Hisashi and Kodaira, Satoshi and C.Lucus, Arthur and Ｃｏｌｌｕｍｓ Ｔｙｌｅｒ and Ｂｅｎｔｏｎ Ｅｒｉｃ and 内堀 幸夫 and 安田 仲宏 and 北村 尚 and 小平 聡},
 journal = {Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms},
 month = {Aug},
 note = {This study investigates alternative plastics for use in the construction of tissue equivalent gas-filled detectors. Four different alternative plastics (acrylic, nylon, polyethylene, and polystyrene) were tested in comparison with A-150 Five proportional counters were constructed possessing spherical ionization cavities each made of one of the five plastics with wall thickness of 3 mm and sensitive diameters of 4.48 cm. The detectors operated at 1400 V. They were exposed to three different energies of proton beams (87, 162, and 222 MeV) and five different heavy ion beams (143 MeV/amu He, 265 MeV/amu C, 440 MeV/amu Si, 430 MeV/amu Ar, and 421 MeV/amu Fe). The detectors were exposed to bare beams in air and no phantom was used. Lineal energy spectra derived from these measurements of energetic protons and heavy ion beams were used for comparison. Frequency averaged lineal energies and dose averaged lineal energies were calculated from each spectrum. Comparison of the experimental data indicates that the responses of the four alternative plastics tested are very similar to the response of A-150 tissue equivalent plastic.},
 pages = {69--72},
 title = {Comparison of plastics used in proportional counters for proton and heavy ion measurements},
 volume = {333},
 year = {2014}
}