Hydrogen-damaged defects near the surface in heavily deformed iron and steels investigated by slow positron annihilation spectroscopy

2007 ◽  
Vol 4 (10) ◽  
pp. 3506-3509 ◽  
Author(s):  
Y. C. Wu ◽  
Y. C. Jean
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Slow Positron

Study of the photodegradation of epoxy polymers with slow positron annihilation spectroscopy

2004 ◽  
Vol 42 (13) ◽  
pp. 2441-2459 ◽  
Author(s):  
R. Zhang ◽  
X. Gu ◽  
H. Chen ◽  
J. Zhang ◽  
Y. Li ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Slow Positron ◽  
Epoxy Polymers

A comparative study of defects in LiF implanted with 100 KeV Al+, Mg+and Ar+by slow Positron Annihilation Spectroscopy

2001 ◽  
Vol 155 (1-4) ◽  
pp. 139-144 ◽  
Author(s):  
E. J. Sendezera ◽  
A. T. Davidson ◽  
A. G. Kozakiewicz ◽  
W. Anwand ◽  
G. Brauer ◽  
...  
Keyword(s):  
Comparative Study ◽  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Slow Positron

Vacancy-type defects near Al surface studied by slow positron annihilation spectroscopy before and after He+ implantation

2010 ◽  
Vol 85 (5) ◽  
pp. 734-738 ◽  
Author(s):  
C.A. Chen ◽  
X. Xiang ◽  
Y. Sun ◽  
C.L. Zhou ◽  
C.X. Ma ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Slow Positron ◽  
Before And After

He-implantation induced defects in Si studied by slow positron annihilation spectroscopy

1999 ◽  
Vol 85 (4) ◽  
pp. 2390-2397 ◽  
Author(s):  
R. S. Brusa ◽  
G. P. Karwasz ◽  
N. Tiengo ◽  
A. Zecca ◽  
F. Corni ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Slow Positron ◽  
Induced Defects

scholarly journals Development of Positron Microbeam in AIST

2008 ◽  
Vol 607 ◽  
pp. 238-242 ◽  
Author(s):  
Nagayasu Oshima ◽  
Ryoichi Suzuki ◽  
Toshiyuki Ohdaira ◽  
Atsushi Kinomura ◽  
T. Narumi ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Spatial Resolution ◽  
Transport System ◽  
Linear Accelerator ◽  
Positron Beam ◽  
Positron Annihilation Spectroscopy ◽  
Beam Size ◽  
Electron Linear Accelerator ◽  
Slow Positron ◽  
Magnetic Transport

To improve the spatial resolution of positron annihilation spectroscopy (PAS), a system to produce an intense positron microbeam was developed in AIST. A slow positron beam, which was produced by an electron linear accelerator, was focused by a lens onto a remoderator to enhance its brightness. The brightness-enhanced beam with an intensity of ≈1 × 106 e+/s was extracted from the remoderator and focused onto the sample by a lens. The beam size at the sample was 25 μm, which is more than two and half orders of magnitude smaller than that in the magnetic transport system (≈10 mm). Hence, the spatial resolution of PAS with an AIST positron microbeam can be drastically improved relative to PAS using conventional methods.

scholarly journals Characterizing free volumes and layer structures in polymeric membranes using slow positron annihilation spectroscopy

2011 ◽  
Vol 262 ◽  
pp. 012027 ◽  
Author(s):  
Y C Jean ◽  
Hongmin Chen ◽  
Sui Zhang ◽  
Hangzheng Chen ◽  
L James Lee ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Polymeric Membranes ◽  
Slow Positron ◽  
Layer Structures

Surface Properties of Polymers Studied by Slow Positron Annihilation Spectroscopy

1997 ◽  
Vol 255-257 ◽  
pp. 704-707 ◽  
Author(s):  
R. Zhang ◽  
H. Cao ◽  
J.P. Yuan ◽  
C.M. Huang ◽  
Qi Yi Zhang ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Surface Properties ◽  
Positron Annihilation Spectroscopy ◽  
Slow Positron
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