POSITRON-ELECTRON ANNIHILATION IN THE PROXIMITY OF A 2ND ELECTRON IN A DENSE MEDIUM

被引：9

作者：

BRUSA, RS ^{[1
]}

DUPASQUIER, A ^{[1
]}

LONGANO, S ^{[1
]}

OSS, S ^{[1
]}

机构：

[1] UNIV CAGLIARI,DIPARTIMENTO SCI FIS,I-09100 CAGLIARI,ITALY

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.43.12715

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Annihilation rates for a positron interacting with two unpaired-spin electrons in a dense environment have been calculated in terms of parameters having the physical meaning of electron-positron contact densities. The influence on annihilation rates of an external magnetic field has been explicitly taken into account. The results of the theory have been fitted to recent experimental data showing the formation in some polymers of a positron bound state with "anomalous" spin characteristics.

引用

页码：12715 / 12722

页数：8

共 21 条

[1] POSITRONIUM [J].

BERKO, S ;

PENDLETON, HN .

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, 1980, 30 :543-581

[2] NEW CALCULATION OF THE PROPERTIES OF THE POSITRONIUM ION [J].

BHATIA, AK ;

DRACHMAN, RJ .

PHYSICAL REVIEW A, 1983, 28 (04) :2523-2525

[3]

BILLARD I, 1988, POSITRON ANNIHILATIO, P177

[4] CONTACT DENSITY AND HYPERFINE SPLITTING OF POSITRONIUM IN NAPHTHALENE [J].

BISI, A ;

CONSOLATI, G ;

ZAPPA, L .

HYPERFINE INTERACTIONS, 1987, 36 (01) :29-37

[5]

BISI A, 1985, NUOVO CIMENTO D, V6, P183, DOI 10.1007/BF02450555

[6] AN UNEXPECTED MAGNETIC-FIELD EFFECT ON POSITRONIUM [J].

BISI, A ;

CONSOLATI, G ;

GAMBARINI, G ;

ZAPPA, L .

LETTERE AL NUOVO CIMENTO, 1984, 40 (06) :176-178

[7] MAGNETIC QUENCHING OF LONG-LIVING STATE OF POSITRON IN KCL CONTAINING F-CENTRES [J].

BISI, A ;

DUPASQUI.A ;

ZAPPA, L .

JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1971, 4 (02) :L33-&

[8]

BISI A, 1983, J PHYS C SOLID STATE, V6, P125

[9] EFFECT OF MOTIONAL MAGNETIC-FIELDS ON POSITRONIUM-LIKE SYSTEMS IN POLAR MEDIA [J].

BRUSA, RS ;

OSS, S ;

DUPASQUIER, A .

LETTERE AL NUOVO CIMENTO, 1985, 42 (01) :45-48

[10]

DIEHL DA, 1989, POSITRON ANNIHILATIO, P537

← 1 2 3 →