Positron lifetimes at the initial stage of pore formation in Vycor glass

被引：5

作者：

Jasinska, B

Dawidowicz, AL

Goworek, T

机构：

[1] Marie Curie Sklodowska Univ, Inst Phys, PL-02031 Lublin, Poland

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

来源：

RADIATION PHYSICS AND CHEMISTRY | 2000年 / 58卷 / 5-6期

关键词：

D O I：

10.1016/S0969-806X(00)00247-4

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：

The formation of narrow pores during leaching of Vycor glass by sulphuric acid was investigated using the positron lifetime technique. During the leaching process the pore diameter remained roughly constant (except for the case of cold leaching). The time of processing changed the total length of capillaries, but not their number; at the temperature 50 degrees C during 20 min of leaching the average leaching depth was 24 mu m. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

收藏

页码：723 / 726

页数：4

相关论文

共 8 条

[1] POSITRONIUM DIFFUSION IN SOLIDS [J].

BRANDT, W ;

PAULIN, R .

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

[2] Positronium in small and large voids in Vycor glass [J].

Ciesielski, K ;

Dawidowicz, AL ;

Goworek, T .

ACTA PHYSICA POLONICA A, 1999, 95 (04) :483-486

[3] Annihilation of positronium in alpha-SiO2 investigated by combined angular correlation and lifetime measurements [J].

Dannefaer, S ;

Friessnegg, T ;

Kerr, D ;

Uedono, A ;

Li, XH ;

Tanigawa, S .

PHYSICAL REVIEW B, 1996, 54 (21) :15051-15055

[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] STRUCTURE OF POROUS VYCOR GLASS AND ITS ADSORPTION CHARACTERISTICS OF WATER - APPLICATION OF POSITRON-ANNIHILATION METHOD [J].

ITO, Y ;

YAMASHINA, T ;

NAGASAKA, M .

APPLIED PHYSICS, 1975, 6 (03) :323-326

[6] 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

[7] POSITRONIUM ANNIHILATION IN MOLECULAR SUBSTANCES [J].

TAO, SJ .

JOURNAL OF CHEMICAL PHYSICS, 1972, 56 (11) :5499-&

[8] 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