Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2016, Vol. 52 ›› Issue (5): 767-775.DOI: 10.13209/j.0479-8023.2015.129

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Development of Multi-energies NRA Methods for Depth Profiling of Deuterium Based on 4.5 MV Electrostatic Accelerator in Peking University

XIAO Xuan, YAN Sha, ZHU Jipeng, GAO Yuan, XUE Jianming, WANG Yugang   

  1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Bejing 100871
  • Received:2015-04-09 Revised:2015-05-06 Online:2016-09-20 Published:2016-09-20
  • Contact: YAN Sha, E-mail: syan(at)

基于北京大学4.5 MV静电加速器的氘分布多能点NRA方法

肖璇, 颜莎, 朱吉鹏, 高原, 薛建明, 王宇钢   

  1. 北京大学物理学院, 核物理与核技术国家重点实验室, 北京 100871
  • 通讯作者: 颜莎, E-mail: syan(at)
  • 基金资助:


To fulfill the need of studying the deuterium retention in nuclear materials, the authors set up an NRA to analyze device with three channel detecting system based on 4.5 MV electrostatic accelerator in Peking University, and developed a multi-energies NRA method for quantitative depth profiling deuterium. With the simultaneous energy spectra of p and 4He created by the D (3He, p) 4He nuclear reaction, by adopting several different incident 3He+ energies (0.8?3.6 MeV), a reasonable better depth resolution and higher sensitivity in a larger analyzing depth could be obtained. The authors also measured differential cross-section of the 3He-D reaction at 135°. The relative accuracy of these data was better than ±3.9%. The initial measurement of concentration and depth profiles of D was carried out, using targets of implanted PC-W samples, as well as CMSIIW samples from a W-coated outer divertor tile of TOKAMAK AUG near the strike points. A ~6 μm analyzed depth could be obtained with a depth resolution less than 1.5 μm throughout the whole detecting range and a ~20 nm minimal resolution at the sample surfaces. The detection limit was around 5×1019 D/m2. Apart from the statistical and fitting error of NRA spectra, the NRA system had an experimental error of ±7.5% from the parameter measurement.

Key words: deuterium concentration and distribution, nuclear reaction analysis, differential cross-section, plasma facing materials


为了满足核材料研究中对氘(D)滞留研究的需要, 基于北京大学4.5 MV 静电加速器, 搭建三路探测系统的NRA 分析装置, 并建立氘含量及深度分布的多能点NRA 方法。该方法利用D (3He, p) 4He 反应, 采用多个能量(0.8~3.6 MeV) 3He+入射, 同时探测出射的p 和4He, 在较大的深度范围内有较好的深度分辨和较高的灵敏度。还在该系统上完成3He-D 反应135° 微分截面的测量, 微分截面误差好于±3.9%。采用该方法进行初次样品氘含量的深度分布分析, 靶为氘注入的PC-W 样品以及TOKAMAK AUG 偏滤器外打击点附近的CMSII-W 样品。在钨样中获得的探测深度约6 μm, 在钨整个探测深度内的深度分辨小于1.5 μm, 表面可达约20 nm, 其探测灵敏度约5×1019 D/m2。该方法的分析误差除统计及拟合误差外, 还包含±7.5%的实验参数测量误差。

关键词: 氘含量与分布测量, 核反应分析, 微分反应截面, 面向等离子体材料

CLC Number: