Photoelectric Effect in Uranium

被引:2
|
作者
Opeil, C. P. [1 ]
Albers, R. C. [1 ]
Blagoev, K. B. [1 ]
Gulacsi, M. [2 ]
Lashley, J. C. [1 ]
Littlewood, P. B. [3 ]
Manley, M. E. [1 ]
Mihaila, B. [1 ]
Riseborough, P. S. [4 ]
Schulze, R. K. [1 ]
Thoma, D. J. [1 ]
Volz, H. M. [1 ]
Smith, J. L. [1 ]
机构
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[2] Australian Natl Univ, Inst Adv Studies, Dept Theoret Phys, Canberra, ACT 0200, Australia
[3] Cavendish Lab, Cambridge CB3 0HE, England
[4] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA
关键词
alpha-U; Photoemission;
D O I
10.1143/JPSJS.75S.56
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report the work function phi for single and polycrytalline alpha-uranium over the temperature range 173 <= T <= 873K. Photoemission spectroscopy (PES) measurements were made at energies 21 eV and 40 eV. Surfaces were prepared in situ by sputter/ annealing cycles under UHV conditions. Like most metals the polycrystalline specimens showed little temperature dependence, the change in the work function Delta phi = 1 %. Conversely the single crystal changed by 5 % over the same temperature range. A sudden temperature arrest in Delta phi centered at 500 K was detected in the single crystal. This arrest coincides with the ductile-to-brittle (dilation change) transformation temperature.
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页码:56 / +
页数:2
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