测量了Al,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,Ga等金属的正电子湮没辐射Doppler展宽谱.采用双探头符合技术,可大幅度地降低谱线的本底,并获得正电子与原子内层电子湮没对谱线的贡献.实验结果表明:谱线的本底随样品与高纯Ge探头之间距离的增加而减小;Ni的商谱(以单晶Al为参考)的谱峰随谱线本底的降低而升高;元素周期表中第四周期的Ti,V,Cr,Mn,Fe,Co,Ni,Cu金属的商谱的谱峰随原子的3d电子数目的增多而升高.
参考文献
[1] | West R N. Adv Phys, 1973, 22:263 |
[2] | Deng W, Xiong L Y, Wang S H, Guo J T, Long Q W.Acta Metall Sin, 2002; 38:453(邓文,熊良钺,王淑荷,郭建亭,龙期威.金属学报,2002;38: 453) |
[3] | ynn K G, MacDonald J R, Boie R A, Feldman L C,Gabbe J D, Robbins M F, Bonderup E, Golovchenko J.Phys Rev Lett, 1977, 38:241 |
[4] | Deng W, Brusa R S, Karwarsz G P, Zecca A. Mater Sci Forum, 2001, 363:195 |
[5] | Deng W, Brusa R S, Karwarsz G P, Zecca A. Mater Sci Forum, 2001, 363:198 |
[6] | Saarinen K, Nissila J, Kauppinen H, Hakala M, Puska M J, Hautojavi P, Corbel C. Phys Rev Lett, 1999, 82:1883 |
[7] | Petkov M P, Weber M H, Lynn K G, Crandall R S, Ghosh V J. Phys Rev Lett, 1999, 82:3819 |
[8] | Ghosh V J, Alatalo M, Asoka-Kumar P, Nielsen B, Lynn K G. Phys Rev, 2000, 61B: 10092 |
[9] | Mylar U, Simpson P J. Phys Rev B, 1997, 56:14303 |
[10] | Asoka-Kumar P, Alatalo M, Ghosh V J, Kruseman A C,Noelsen B, Lynn K G. Phys Rev Lett, 1996, 82:2097 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%