THEORY AND EXPERIMENT IN RAPID, SENSITIVE HELIUM-3 ACTIVATION ANALYSIS. HELIUM-3 REACTIONS AS NEUTRON SOURCES
THEORY AND EXPERIMENT IN RAPID, SENSITIVE HELIUM-3 ACTIVATION ANALYSIS. HELIUM-3 REACTIONS AS NEUTRON SOURCES
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快速、灵敏的 HeLIUM-3 活化分析的理论和实验。
DOI：
10.1021/ac60225a029
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发表时间：
1965
影响因子：
7.4
通讯作者：
R. Hahn
中科院分区：
文献类型：
--
作者：
E. Ricci;R. Hahn
一个通用的数学处理，减少带电粒子活化分析厚样品几乎简单的中子活化。为了确定铍，碳，氮，氧和氟的检测限，厚和薄的目标进行了照射与5-和10-兆电子伏的3 He离子。结果表明，这些元素可以很容易地检测到的十亿分之几的浓度范围内。特别地，通过测定2分钟sO，可以以高灵敏度快速测定氧。给出了几种反应氧的检出限与射程和原子序数的关系曲线。测量了10 MeV ~ 3 He粒子与锂、铍和硼反应的中子输出，并与常规中子发生器中（d+ f）反应的中子输出进行了比较。此外，从3 He辐照的中子产额不减少与目标的使用。高能射线（~ 20 mev）的产量也很重要。这些结果表明，一个小型回旋加速器，建立再活化分析，可以有效地用于快中子和光活化分析。
A general mathematical treatment is developed that reduces chargedparticle activation analysis of thick samples to almost the simplicity of neutron activation. To determine the detection limits for beryllium, carbon, nitrogen, oxygen, and fluorine, thick and thin targets were irradiated with 5-and 10-mev 3He ions. The results show that these elements can be easily detected in the concentration range of parts per billion. In particular, oxygen can be rapidly determined with high sensitivity by assaying 2-minute, sO. Curves of detection limits for oxygen vs. range and atomic number are given for several reac-tions. The neutron outputs from reac-tions of 10-mev 3He particles with lithium, beryllium, and boron were measured and compare favorably with those from (d+ f) reactions in conventional neutron generators. Furthermore, the neutron yields from 3He irradiations do not decrease with target usage. The yield of high-energy-rays (~ 20 mev) is also significant. These resultssuggest that a small cyclotron, built for Re-activation analysis, could be effectively used for fast-neutron and photoactivation analysis.