@article{oai:repo.qst.go.jp:00046037,
 author = {Ota, Syuya and Yasuda, Nakahiro and Sihver, Lembit and Kodaira, Satoshi and Kurano, Mieko and Naka, Shuichiro and Ideguchi, Yusuke and Benton, Eric and Hasebe, Nobuyuki and 太田 周也 and 安田 仲宏 and 小平 聡 and 蔵野 美恵子 and 仲 秀一郎 and 井手口 悠介},
 issue = {12},
 journal = {Nuclear Instruments & Methods in Physics Research Section B},
 month = {May},
 note = {The charge resolution (dZ) for heavy ions (nuclear charge: Z < 40) of 0.1&#8211;1 GeV/n energy in CR-39 plastic nuclear track detector (PNTD) and its dependence on etching time, and on projectile Z and energy were investigated and optimized as part of an effort to make precise measurements of projectile charge-changing cross sections. Two types of CR-39 PNTD, HARZLAS TD-1 and BARYOTRAK, were exposed to heavy ion beams with seven values of Z behind thick targets to produce projectile fragments. Following chemical etching (7 N NaOH at 70 degreeC) for varying etch times, dZ of the projectiles was determined for each detector type. A strong dependence of dZ on the amount of bulk etch (B) was seen. It was also observed that dZ can be remarkably improved with longer etching time as a function of B^-{1/2}, in accordance with the trend seen in other types of track detector such as glass nuclear track detector. However, for B > 60 lm(30 h etching), saturation occurs and there is no further improvement in dZ. Analysis of the correlations between projectile Z, energy, detector response, and fluctuation of the response make it possible to develop a model to predict the dZ for projectiles of given Z and energy. The predicted and measured values of dZ show good agreement within 10%. We conclude that 4 < Z < 30 at intermediate energy can be identified with good dZ in these detectors. The predictive model will be used in designing future cross section measurement experiments.},
 pages = {1382--1388},
 title = {Charge resolution of CR-39 plastic nuclear track detectors for intermediate energy heavy ions},
 volume = {269},
 year = {2011}
}