The momentum distribution of annihilating positron-electron pairs in aluminum

被引：11

作者：

Ghosh, VJ ^{[1
]}

Alatalo, M ^{[1
]}

AsokaKumar, P ^{[1
]}

Lynn, KG ^{[1
]}

Kruseman, AC ^{[1
]}

机构：

[1] DELFT UNIV TECHNOL,INTERFAC REACTOR INST,NL-2629 JB DELFT,NETHERLANDS

来源：

APPLIED SURFACE SCIENCE | 1997年 / 116卷

关键词：

momentum distribution; positron states; positron annihilation; lifetime; vacancy;

D O I：

10.1016/S0169-4332(96)01069-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Experimental and theoretical results for the momentum distribution of the positron-electron pairs in defect-free bull; Al and Al containing vacancies are presented. The experimental data was obtained using a two-Ge-detector coincidence measurement of the Doppler broadening of the annihilation radiation. This setup enables an accurate measurement of the high-momentum part of the spectrum, thereby making it possible to compare experimental and theoretical results over a wider momentum range. Various approximations of the localized positron wave function (in the presence of an ideal monovacancy) an discussed.

引用

页码：278 / 282

页数：5

共 15 条

[1] IDENTIFICATION OF VACANCY DEFECTS IN COMPOUND SEMICONDUCTORS BY CORE-ELECTRON ANNIHILATION - APPLICATION TO INP [J].

ALATALO, M ;

KAUPPINEN, H ;

SAARINEN, K ;

PUSKA, MJ ;

MAKINEN, J ;

HAUTOJARVI, P ;

NIEMINEN, RM .

PHYSICAL REVIEW B, 1995, 51 (07) :4176-4185

[2] Theoretical and experimental study of positron annihilation with core electrons in solids [J].

Alatalo, M ;

Barbiellini, B ;

Hakala, M ;

Kauppinen, H ;

Korhonen, T ;

Puska, MJ ;

Saarinen, K ;

Hautojarvi, P ;

Nieminen, RM .

PHYSICAL REVIEW B, 1996, 54 (04) :2397-2409

[3]

[Anonymous], P INT SCH PHYS ENR F

[4] Increased elemental specificity of positron annihilation spectra [J].

AsokaKumar, P ;

Alatalo, M ;

Ghosh, VJ ;

Kruseman, AC ;

Nielsen, B ;

Lynn, KG .

PHYSICAL REVIEW LETTERS, 1996, 77 (10) :2097-2100

[5] GRADIENT CORRECTION FOR POSITRON STATES IN SOLIDS [J].

BARBIELLINI, B ;

PUSKA, MJ ;

TORSTI, T ;

NIEMINEN, RM .

PHYSICAL REVIEW B, 1995, 51 (11) :7341-7344

[6] The numerical solution of Schrodinger's equation [J].

Kimball, GE ;

Shortley, GH .

PHYSICAL REVIEW, 1934, 45 (11) :0815-0820

[7] VACANCIES STUDIED BY POSITRON-ANNIHILATION WITH HIGH-MOMENTUM CORE ELECTRONS [J].

LYNN, KG ;

DICKMAN, JE ;

BROWN, WL ;

ROBBINS, MF ;

BONDERUP, E .

PHYSICAL REVIEW B, 1979, 20 (09) :3566-3572

[8]

LYNN KG, 1977, PHYS REV LETT, V38, P211

[9] 2-DIMENSIONAL DOPPLER BROADENED TECHNIQUE IN POSITRON-ANNIHILATION [J].

MACDONALD, JR ;

LYNN, KG ;

BOIE, RA ;

ROBBINS, MF .

NUCLEAR INSTRUMENTS & METHODS, 1978, 153 (01) :189-194

[10] DEFECT SPECTROSCOPY WITH POSITRONS - A GENERAL CALCULATIONAL METHOD [J].

PUSKA, MJ ;

NIEMINEN, RM .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1983, 13 (02) :333-346

← 1 2 →