scholarly journals Calculation of positron wave function in the single crystal solid

2010 ◽  
Vol 59 (10) ◽  
pp. 7374
Author(s):  
Xiong Tao ◽  
Zhang Jie ◽  
Chen Xiang-Lei ◽  
Ye Bang-Jiao ◽  
Du Huai-Jiang ◽  
...  
Keyword(s):  
Wave Function ◽  
Single Crystal ◽  
Positron Wave Function

Study of Single Crystals of Magnesium and Zinc by Positron Annihilation

1972 ◽  
Vol 50 (20) ◽  
pp. 2520-2522 ◽  
Author(s):  
E. H. Becker ◽  
E. M. D. Senicki ◽  
A. G. Gould ◽  
B. G. Hogg
Keyword(s):  
Wave Function ◽  
Single Crystals ◽  
Positron Annihilation ◽  
Enhancement Factor ◽  
Wave Functions ◽  
Theoretical Predictions ◽  
Positron Wave Function ◽  
Electronic Wave Functions ◽  
Simple Picture ◽  
Theory And Experiment

A point geometry positron annihilation angular correlation apparatus has been used to study oriented single crystals of magnesium and zinc. The results are compared with the theoretical predictions obtained from a simple picture of the electronic wave functions combined with two models for the positron wave function. The agreement between theory and experiment is considerably improved in the case of magnesium by the use of an enhancement factor.

Influence of the Positron Wave Function on the Electron-Positron Momentum Density

1994 ◽  
Vol 175-178 ◽  
pp. 909-912
Author(s):  
G. Kontrym-Sznajd ◽  
H. Sormann
Keyword(s):  
Wave Function ◽  
Momentum Density ◽  
Electron Positron ◽  
Positron Wave Function

scholarly journals Umklapp Components of the Positron Momentum Density Depending on Different Models for the Positron Wave Function

1995 ◽  
Vol 88 (1) ◽  
pp. 185-192 ◽  
Author(s):  
G. Kontrym-Sznajd ◽  
H. Sormann
Keyword(s):  
Wave Function ◽  
Momentum Density ◽  
Positron Wave Function

Positron Wave-Function Effects (?) and the Fermi Surface of Paramagnetic Cr and Mo

1997 ◽  
Vol 255-257 ◽  
pp. 417-419 ◽  
Author(s):  
H.M. Fretwell ◽  
Stephen B. Dugdale ◽  
A. Rodríguez-González ◽  
M.Ashraf Alam ◽  
N. Shiotani ◽  
...  
Keyword(s):  
Wave Function ◽  
Fermi Surface ◽  
Positron Wave Function

Anisotropy of positron wave function in 4d transition metals

1982 ◽  
Vol 41 (9) ◽  
pp. 683-685 ◽  
Author(s):  
H.P. Bonde ◽  
S.B. Shrivastava ◽  
K.P. Joshi
Keyword(s):  
Wave Function ◽  
Transition Metals ◽  
Positron Wave Function

Effect of Positron Wave Function on Positron Annihilation Rates and Electron-Positron Momentum Densities in Solids

2001 ◽  
Vol 363-365 ◽  
pp. 603-605
Author(s):  
Anna Rubaszek ◽  
Z. Szotek ◽  
W.M. Temmerman
Keyword(s):  
Wave Function ◽  
Positron Annihilation ◽  
Electron Positron ◽  
Positron Wave Function

Positron Annihilation and the Band Structure in Molybdenum

1972 ◽  
Vol 50 (15) ◽  
pp. 1777-1781 ◽  
Author(s):  
S. M. Kim ◽  
W. J. L. Buyers
Keyword(s):  
Wave Function ◽  
Band Structure ◽  
Angular Correlation ◽  
Room Temperature ◽  
Theoretical Calculations ◽  
Plane Waves ◽  
Interpolation Scheme ◽  
Accurate Representation ◽  
Two Photon ◽  
Positron Wave Function

Measurements have been made of the two-photon angular correlation from positrons annihilating in single-crystal molybdenum at room temperature. By means of a combination of conventional slits and Soller slits the number of annihilations for which the momentum lies along a line in the momentum distribution is obtained, and results are presented for the [ζ,ζ,0], [0,0,ζ, and [ζ,ζ,0.71] directions. Theoretical calculations of the angular correlation have been made based on the interpolation or pseudopotential scheme with s–d interaction included. The parameters of the interpolation scheme have been chosen so that an accurate representation is obtained of the APW band structure of Mattheiss. The positron wave function has been obtained in terms of 141 plane waves. The width of the calculated two-photon angular correlation is found to be much broader than the experimental width unless the relative s and d enhancement is considered.

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