Positronium in small and large voids in Vycor glass

被引：5

作者：

Ciesielski, K

Dawidowicz, AL

Goworek, T

机构：

[1] Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland

[2] Marie Curie Sklodowska Univ, Fac Chem, Dept Chem Phys, PL-20031 Lublin, Poland

来源：

ACTA PHYSICA POLONICA A | 1999年 / 95卷 / 04期

关键词：

D O I：

10.12693/APhysPolA.95.483

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The intensities of ortho-positronium components related to the pores and to small voids in the bulk were determined for a series of Vycor glasses. The ratio of "pore fraction" to the total o-Ps yield depends on the specific surface area of the porous medium. The diffusion coefficient for o-Ps was found equal to 3.7 x 10(-5) cm(2)/s.

引用

收藏

页码：483 / 486

页数：4

相关论文

共 7 条

[1] POSITRONIUM DIFFUSION IN SOLIDS [J].

BRANDT, W ;

PAULIN, R .

PHYSICAL REVIEW LETTERS, 1968, 21 (04) :193-&

[2] Positronium lifetimes is porous Vycor glass [J].

Ciesielski, K ;

Dawidowicz, AL ;

Goworek, T ;

Jasinska, B ;

Wawryszczuk, J .

CHEMICAL PHYSICS LETTERS, 1998, 289 (1-2) :41-45

[3] The analysis of non-exponential decay in relation to positronium thermalization [J].

Dauwe, C ;

Consolati, G ;

VanHoecke, T ;

Segers, D .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 371 (03) :497-503

[4] THE TEMPERATURE-DEPENDENCE OF POSITRON LIFETIMES IN SOLID PIVALIC ACID [J].

ELDRUP, M ;

LIGHTBODY, D ;

SHERWOOD, JN .

CHEMICAL PHYSICS, 1981, 63 (1-2) :51-58

[5] Microcomputer program for analysis of positron annihilation lifetime spectra [J].

Kansy, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 374 (02) :235-244

[6]

MOGENSEN OE, 1995, POSITRON ANNIHILATIO

[7] APPLICATION OF POSITRON-ANNIHILATION TO STUDY THE SURFACE-PROPERTIES OF POROUS RESINS [J].

VENKATESWARAN, K ;

CHENG, KL ;

JEAN, YC .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (12) :2465-2469