POSITRONIUM FORMATION IN (BI/BI-PB)-2212 AND (BI/BI-PB)-2223 SUPERCONDUCTORS

被引：16

作者：

SANYAL, D

DE, UY

MANDAL, K

BANERJEE, D

BHATTACHARYA, R

机构：

[1] CTR VARIABLE ENERGY CYCLOTRON,DEPT ATOM ENERGY,CALCUTTA 700064,W BENGAL,INDIA

[2] UNIV CALCUTTA,DEPT PHYS,CALCUTTA 700009,W BENGAL,INDIA

[3] SN BOSE NATL CTR BASIC SCI,CALCUTTA 700064,W BENGAL,INDIA

来源：

PHYSICS LETTERS A | 1995年 / 204卷 / 3-4期

关键词：

D O I：

10.1016/0375-9601(95)00442-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Positron annihilation lifetime (PAL) measurements on well-characterized pellets of Bi-2212, (Bi,Pb)-2212 and (Bi,Pb)-2223 superconductors indicate the presence of a very long (around 1500 ps) third lifetime. This tau(3) is attributed to positronium formation in voids even in these conducting oxides and subsequent o-Ps to p-Ps conversion. Ignoring tau(3) in the fit leads to altered values of tau(1) and tau(2).

引用

页码：305 / 309

页数：5

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