SOURCES FOR POSITRON LIFETIME SPECTROSCOPY PRODUCED BY ION-IMPLANTATION OF NA-22

Authors
POULSEN JR ELDRUP M LETTRY J
Citation
Jr. Poulsen et al., SOURCES FOR POSITRON LIFETIME SPECTROSCOPY PRODUCED BY ION-IMPLANTATION OF NA-22, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 95(2), 1995, pp. 260-264
Citations number
13
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
95
Issue
2
Year of publication
1995
Pages
260 - 264
Database
ISI
SICI code
0168-583X(1995)95:2<260:SFPLSP>2.0.ZU;2-4
Abstract
Positron sources have been produced by ion implantation of Na-22 into foils of Al, Ni and Pt. The ion implantation was carried out at ISOLDE with a Ta-oven and W-surface ionizer unit. Commercial carrier free 22 NaCl was ionized with an efficiency of 31%. An implanted Pt foil was a nnealed at a temperature of 1000-degrees-C in order to produce positro n sources suitable for in situ positron lifetime spectroscopy in tempe rature and oxygen partial pressure regions that remain unattainable fo r conventional positron sources. The lifetimes and relative intensitie s of positrons annihilating in the implanted sources have been measure d and compared with those of a conventional 22NaCl positron source.