Near-surface investigation of positron diffusion length in helium-implanted Fe9Cr and its ODS variant

被引：7

作者：

Degmova, Jarmila ^{[1
]}

Krsjak, Vladimir ^{[1
]}

Shen, Tielong ^{[2
]}

Veternikova, Jana Simeg ^{[1
]}

Gatciova, Andrea ^{[1
]}

Sojak, Stanislav ^{[1
]}

Hruska, Petr ^{[3
]}

机构：

[1] Slovak Univ Technol Bratislava, Fac Elect Engn & Informat Technol, Inst Nucl & Phys Engn, Ilkovicova 3, Bratislava 81219, Slovakia

[2] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China

[3] Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221, Czech Republic

来源：

APPLIED SURFACE SCIENCE | 2021年 / 538卷

关键词：

F/m steels; He+ implantation; Slow positron Doppler broadening technique; Positron diffusion length; FE-CR ALLOYS; DEFECTS; IRRADIATION; EVOLUTION; STEELS; BEAM;

D O I：

10.1016/j.apsusc.2020.148004

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：

In the present paper, we employ the depth sensitive slow positron Doppler broadening technique to characterise the positron diffusion in various near-surface layers of He+ implanted f/m steels. One of the frequently used positron annihilation parameters, with a high sensitivity to radiation-induced defects in a wide range of displacement damage, is the positron diffusion length. This parameter expresses the probability of the back diffusion of positrons to the surface and reflects the microstructural damage. Via the application of VEPFIT program on Doppler broadening spectroscopy data obtained on helium-implanted Fe9Cr and ODS Fe9Cr steels, we determined the changes in diffusion length and thickness of corresponding layers due to implantation.

引用

页数：5

共 28 条

[21] Positron lifetime studies of defects in α-Fe containing helium [J].