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1.中国科学院上海原子核研究所
2.上海交通大学
收稿日期:1983-11-23,
纸质出版日期:1985
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彭郁卿, 郑万辉, 张怡萍, 等. LiF晶体中色心的吸收光谱与正电子湮没辐射多普勒展宽研究[J]. 核技术, 1985,08(1):12-13,10,72.
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.
彭郁卿, 郑万辉, 张怡萍, 等. LiF晶体中色心的吸收光谱与正电子湮没辐射多普勒展宽研究[J]. 核技术, 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:
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
60
Co的
γ
射线在室温下照射样品。当剂量的变化范围为1×10
5
rad—1.3×10
8
rad时,LiF晶体中出现了
F
、
F
2
、
F
2
+
、
F
3
、
F
4
、
R
1
和R'等色心,由于受光谱仪波长范围的限制,
F
2
-
未观察到。当照射剂量小于1×10
6
rad时,我们得出
F
-心浓度、
S
-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
6
rad,由于
F
-聚集心的出现,
S
-参数正比于照射剂量的对数。
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
γ
-ray of
60
Co at room temperature. When the dose varies in the range 1×10
5
rad—1.3×10
8
rad
the F
F
2
F
2
+
F
3
F
4
R
and R' color centers appear in the LiF crystal. The F
2
-
is not observed because it is limited by wavelenth range of used spectrometer. At irradiation dose lesser then 1 × 10
6
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
6
rad
the change of the S-parameter is proportional to the logarithm of irradiation dose due to the appearance of F aggregate centers.
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 ).
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