Positron lifetime spectrometer using a DC positron beam
Abstract
An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1174542
- Patent Number(s):
- 6635871
- Application Number:
- 09/894,776
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Citation Formats
Xu, Jun, and Moxom, Jeremy. Positron lifetime spectrometer using a DC positron beam. United States: N. p., 2003.
Web.
Xu, Jun, & Moxom, Jeremy. Positron lifetime spectrometer using a DC positron beam. United States.
Xu, Jun, and Moxom, Jeremy. Tue .
"Positron lifetime spectrometer using a DC positron beam". United States. https://www.osti.gov/servlets/purl/1174542.
@article{osti_1174542,
title = {Positron lifetime spectrometer using a DC positron beam},
author = {Xu, Jun and Moxom, Jeremy},
abstractNote = {An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {10}
}
Works referenced in this record:
An intense pulsed positron beam
journal, December 1994
- Suzuki, Ryoichi; Kobayashi, Yoshinori; Mikado, Tomohisa
- Hyperfine Interactions, Vol. 84, Issue 1
Measurement of the Positron Surface-State Lifetime for Al
journal, March 1984
- Lynn, K. G.; Frieze, W. E.; Schultz, Peter J.
- Physical Review Letters, Vol. 52, Issue 13