Low‐Temperature Thermal Conductivity in Neutron Irradiated Vitreous Silica
Low‐Temperature Thermal Conductivity in Neutron Irradiated Vitreous Silica
复制标题
中子辐照石英玻璃的低温导热系数
DOI：
10.1063/1.1723229
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发表时间：
1958
影响因子：
3.2
通讯作者：
A. Cohen
中科院分区：
文献类型：
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作者：
A. Cohen
在快中子轰击前后的低温下测量了石英玻璃的热导率K。所观察到的轰击后K的增加与Klemens的预测一致。在所用的曝光范围内，K随剂量近似线性增加至所用水平（6×1019 n/cm 2），而密度似乎接近饱和，表明这两种性质不直接相关。一个可能的解释K增加轰击是中子轰击减轻宏观应变。或者，轰击可能导致玻璃质材料中局部有序性的增加。
Measurements of the thermal conductivity, K, of vitreous silica have been made at low temperatures before and after fast neutron bombardment. The observed increase of K upon bombardment is in agreement with the prediction of Klemens. Over the exposure range used, K increases approximately linearly with dose to the level used (6×1019 n/cm2) whereas the density appears to have nearly saturated, suggesting that the two properties are not directly related. A possible explanation for the K increase upon bombardment is that the neutron bombardment relieves macroscopic strains. Alternatively, it is possible that bombardment causes an increase in local order in the vitreous material.