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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research >Charge resolution of CR-39 plastic nuclear track detectors for intermediate energy heavy ions
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Charge resolution of CR-39 plastic nuclear track detectors for intermediate energy heavy ions

机译：CR-39塑料核径迹探测器对中能重离子的电荷分辨

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摘要

The charge resolution {SZ) for heavy ions (nuclear charge: Z< 40) of 0.1-1 GeV 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 ℃) for varying etch times, SZ of the projectiles was determined for each detector type. A strong dependence of SZ on the amount of bulk etch (B) was seen. It was also observed that SZ 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 μm (30 h etching), saturation occurs and there is no further improvement in SZ. 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 SZ for projectiles of given Z and energy. The predicted and measured values of SZ show good agreement within 10%. We conclude that 4 ≤ Z ≤ 30 at intermediate energy can be identified with good SZ in these detectors. The predictive model will be used in designing future cross section measurement experiments.
机译：CR-39塑料核径迹检测器（PNTD）中重离子（核电荷：Z <40）的能量分辨率为0.1-1 GeV / n，其电荷分辨率{SZ}与蚀刻时间，弹丸Z和能量的关系为为了精确测量弹丸电荷变化横截面而进行的调查和优化。两种CR-39 PNTD，HARZLAS TD-1和BARYOTRAK，暴露于重离子束中，在厚靶后面具有七个Z值，以产生弹丸碎片。在化学蚀刻（70℃的7 N NaOH）中改变蚀刻时间后，针对每种探测器类型确定了弹丸的SZ。可以看出，SZ对整体蚀刻量（B）的依赖性强。还观察到，根据在诸如玻璃核径迹检测器的其他类型的径迹检测器中看到的趋势，随着B _（-1/2）的函数，更长的刻蚀时间可以显着改善SZ。但是，对于B≥60μm（蚀刻30 h），会发生饱和，并且SZ不会进一步改善。对弹丸Z，能量，探测器响应和响应波动之间的相关性进行分析，可以为给定Z和能量的弹丸开发模型以预测SZ。 SZ的预测值和测量值在10％内显示出良好的一致性。我们得出的结论是，在这些探测器中，具有良好的SZ可以识别出中等能量下4≤Z≤30。该预测模型将用于设计未来的横截面测量实验。

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  • 来源
    《Nuclear Instruments & Methods in Physics Research》 |2011年第12期|p.1382-1388|共7页
  • 作者

    S. Ota; N. Yasuda; L Sihver; S. Kodaira; M. Kurano; S. Naka; Y. Ideguchi; E.R. Benton; N. Hasebe;

  • 作者单位

    Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan,National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage, Chiba 263-8555, Japan;

    National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage, Chiba 263-8555, Japan;

    Chalmers University of Technology, SE 412-96 Coteborg, Sweden,Roanoke College, Salem, VA 24153, USA,Texas A&M University, TX 77843-3133, USA;

    National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage, Chiba 263-8555, Japan;

    National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage, Chiba 263-8555, Japan;

    Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;

    Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;

    Radiation Physics Laboratory, Oklahoma State University, Stillwater, OK 74074, USA;

    Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;

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  • 正文语种 eng
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  • 关键词

    charge resolution; cr-39 nuclear track detector; heavy ion; galactic cosmic ray; nuclear fragmentation; charge-changing cross section;

    机译：收费决议;cr-39核径迹探测器;重离子银河宇宙射线核碎裂电荷变化截面;

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