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Study of deposition behavior of deuterium in palladium using D-D nuclear reaction
- NUCLEAR TECHNIQUES Vol. 40, Issue 2, Article number: 020201(2017)
- 作者机构：
兰州大学 核科学与技术学院 兰州 730000
- 作者简介：
- 基金信息：National Natural Science Foundation of China;National Natural Science Foundation of China;National Natural Science Foundation of China;Fundamental Research Funds for the Central Universities;JSPS KAKENHI
DOI：10.11889/j.0253-3219.2017.hjs.40.020201
CLC： TL99Received：11 October 2016，
Revised：23 December 2016，
Published：10 February 2017
- 稿件说明：
移动端阅览
Houjun HE, Xiaohui XU, Yongkai LU, et al. Study of deposition behavior of deuterium in palladium using D-D nuclear reaction[J]. Nuclear techniques, 2017, 40(2): 020201
Houjun HE, Xiaohui XU, Yongkai LU, et al. Study of deposition behavior of deuterium in palladium using D-D nuclear reaction[J]. Nuclear techniques, 2017, 40(2): 020201 DOI： 10.11889/j.0253-3219.2017.hjs.40.020201.
摘要
氢同位素在钯中的沉积行为与它在钯靶中的溶解度、扩散速率以及缺陷的束缚有关。为研究氘离子在钯中的沉积行为，利用氘离子诱发D-D核反应的方法研究了氘在钯中的动态和静态浓度，并建立扩散模型对实验结果进行了分析。研究发现，除稳定束缚在缺陷中的氘之外，束流注入时动态氘浓度还包含自由扩散的氘以及非稳定束缚态氘；自由扩散的氘以及非稳定束缚态氘随着氘离子的注入而增加，当注入达到饱和后，这两部分氘浓度处于动态平衡状态，停束后将迅速减少直至消失；由于辐照损伤所造成的缺陷存在饱和值，稳定束缚在缺陷中的静态氘浓度为
x
=（0.42±0.03）%；结合模拟计算，发现钯的缺陷对氢同位素的吸附系数、解吸附系数及其比值
k
A
/
k
D
与材料损伤特性及氢同位素的注入方式有关。
Abstract
Background:
2
Palladium is a very important hydrogen storage material with high hydrogen absorption capacity. It also plays an important role in the separation process of hydrogen isotopes.
Purpose:
2
The aim is to study the deposition behavior of deuterium ions in palladium.
Methods:
2
The dynamic and static concentration of deuterium in palladium was studied by means of D-D nuclear reaction induced by deuterium ion. These data were analyzed with a diffusion model.
Results:
2
The dynamic deuterium consists of free diffusing deuterium
unsteadily trapped deuterium and steadily trapped deuterium. The concentration of free diffusing deuterium and unsteadily trapped deuterium were increased with deuterium ion implantation
and then reached dynamic balance state when the deuterium was saturated
and would disappear quickly when the beam stopped. While the static deuterium concentration steadily trapped in defects were
x
=(0.42±0.03)%
due to defects caused by radiation damage reached saturation.
Conclusion:
2
The deposition behavior of hydrogen isotopes and its adsorption/desorption coefficient in Pd were closely related to the damage characteristics of materials and hydrogen isotope injection method.
关键词
Keywords
references
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