Spontaneous Emission of Positronium Negative Ions from Tungsten (100) Surface

Yasuyuki Nagashima; Toshihide Hakodate; Ayaka Miyamoto; Koji Michishio

doi:10.4028/www.scientific.net/MSF.607.161

Paper Titles

The Calculation of Positron Lifetime in Ni₃Al Alloy
p.146

Defects in Carbon Allotropes Studied by Positron Annihilation
p.149

Positron Annihilation on the Surfaces of Single Crystals of Si, SiO₂, Graphite and Cu
p.152

Some Problems of the Free Volume Studies in Porous Polymers Using Positron Annihilation and Auxiliary Techniques
p.155

Spontaneous Emission of Positronium Negative Ions from Tungsten (100) Surface
p.161

Temperature and Pressure Measurements of PALS Spectra in Photonic Glasses
p.166

Positron Lifetime Spectroscopy on Controlled Pore Glass Porosimetry and Pore Size Distribution
p.169

Monitoring the Crystallization Stages of Silicalite by Positron Lifetime Spectroscopy
p.173

Free Volumes in Polymer Nanocomposites
p.177

HomeMaterials Science ForumMaterials Science Forum Vol. 607Spontaneous Emission of Positronium Negative Ions...

Spontaneous Emission of Positronium Negative Ions from Tungsten (100) Surface

Abstract:

Recently, we have observed spontaneous emission of positronium negative ions from polycrystalline tungsten surface. In the present work, we have extended the study to the emission from tungsten single crystal. The emission from tungsten (100) surface plane has been confirmed. The fraction of positrons yielding the ions at the target surface was ()4102.02.1−×±.