The absorption spectrum and positron annihilation radiation doppler broadening study of color centers in LiF crystal

Yuqing Peng; Wanhui Zheng; Yiping Zhang; Shenghua Li

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The absorption spectrum and positron annihilation radiation doppler broadening study of color centers in LiF crystal

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- The absorption spectrum and positron annihilation radiation doppler broadening study of color centers in LiF crystal
- Nuclear Techniques Vol. 08, Issue 1, (1985)
- 作者机构：
  
  1.中国科学院上海原子核研究所
  2.上海交通大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：23 November 1983，
  
  Published：1985
- 稿件说明：
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Yuqing Peng, Wanhui Zheng, Yiping Zhang, et al. The absorption spectrum and positron annihilation radiation doppler broadening study of color centers in LiF crystal[J]. Nuclear techniques, 1985, 08(1): 12-13,10,72.
DOI：

Yuqing Peng, Wanhui Zheng, Yiping Zhang, et al. The absorption spectrum and positron annihilation radiation doppler broadening study of color centers in LiF crystal[J]. Nuclear techniques, 1985, 08(1): 12-13,10,72. DOI：

摘要

我们用吸收光谱与正电子湮没方法研究了辐照LiF中的色心。样品是纯的LiF单晶。用

Co的

射线在室温下照射样品。当剂量的变化范围为1×10

rad—1.3×10

rad时，LiF晶体中出现了

、

和R'等色心，由于受光谱仪波长范围的限制，

未观察到。当照射剂量小于1×10

rad时，我们得出

－心浓度、

－参数的相对变化是剂量平方根的线性函数。然而，当剂量大于1×10

rad，由于

-聚集心的出现，

-参数正比于照射剂量的对数。

Abstract

The color centers in irradiated LiF are investigated by absorption spectrum and positron annihilation. The samples are pure LiF single crystal

which are irradiated with

-ray of

Co at room temperature. When the dose varies in the range 1×10

rad—1.3×10

rad

the F

and R' color centers appear in the LiF crystal. The F

is not observed because it is limited by wavelenth range of used spectrometer. At irradiation dose lesser then 1 × 10

rad

we obtained that the concentration of F-center and the relative change in S-parameter are a linear function of the spuare root of the irradiation dose. However

at the dose larger then 1×10

rad

the change of the S-parameter is proportional to the logarithm of irradiation dose due to the appearance of F aggregate centers.

关键词

Keywords

references

E. Sonder and L. C. Templeton , Radiation Effects , 16 , 1-2 , 115 （ 1972 ）.

L. L. Regel et al ., Phys. Stat. Sol. （a） , 73 , 1 , 255 （ 1982 ）.

忻自豪等，钴源辐照LiF晶体色心形成的机制和衰变研究。

Jr J. H. Crawford . ed ., Point defects in solids , Plenum Press , New York, London , Vol.1 , chap. 4 , 1972 . p. 269 .

James H. Schulman and W. Dale Compton , Color centers in solid , Pergamon Press , 1962 , p. 86 .

R. T. Bate and C. V. Heer , J. Phys. Chem. Solids , 7 , 14 , 21 （ 1958 ）.

同文献[4] , 249 页。

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