SPOT IL - Slow positron facility in Israel

P. Or*, D. Dribin, D. Cohen, G. Erlichman, E. Cohen, O. Hen, E. Piasetzky, I. Sabo-Napadensky, H. Steinberg, S. May Tal Beck, G. Ron

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


A slow positron facility is being built in Israel, at the Hebrew University, for basic and applied research. It consists of a slow positron beam and a compact Positrons Annihilation Lifetime (PAL) spectrometer. The slow positron beam follows a traditional design, using a 22Na source, of about 40mCi, a Tungsten moderator and a unique grounded target cell, with positrons energy that can vary between 0.03 keV and 30 keV. The detection system will be comprised of High Purity Germanium and BaF2 detectors, facing each other, for low background Doppler Broadening (DB) measurements. The target cell is designed to allow a combined measurement of sample conductivity and DB, with the flexibility to add more detection options in the future. The compact PAL spectrometer includes two fast scintillation detectors read by a fast digitizer (DRS4), with a sampling rate of 5.12 GS/s. A dedicated software package was developed to emulate analogue data acquisition. Lifetime measurements were performed using a ∼25 μCi 22Na source. The time resolution was defined using a 60Co source, to be 180-200ps. First positron lifetime validation measurements of Ti resulted in positrons lifetime of 157 ± 4 ps, consistent with previously published values.

Original languageAmerican English
Title of host publication18th International Conference on Positron Annihilation, ICPA 2018
Subtitle of host publicationPositron Annihilation Spectroscopy-Fundamentals, Techniques ad Applications
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735419292
StatePublished - 27 Dec 2019
Event18th International Conference on Positron Annihilation: Positron Annihilation Spectroscopy-Fundamentals, Techniques ad Applications, ICPA 2018 - Orlando, United States
Duration: 19 Aug 201824 Aug 2018

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference18th International Conference on Positron Annihilation: Positron Annihilation Spectroscopy-Fundamentals, Techniques ad Applications, ICPA 2018
Country/TerritoryUnited States

Bibliographical note

Funding Information:
This project is supported by the Ministry of Economy under the KAMIN program and by the Pazy grant of the IAEC. We wish to thank the SPONSOR group at HZDR, Germany, for sharing their knowledge and for guiding and supporting us in all aspects of the source and beam design. Special thanks to Wolfgang Anwand from HZDR, who was always available and willingly devoted his time to teach and help us.

Publisher Copyright:
© 2019 Author(s).


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