TY - GEN
T1 - SPOT IL - Slow positron facility in Israel
AU - Or, P.
AU - Dribin, D.
AU - Cohen, D.
AU - Erlichman, G.
AU - Cohen, E.
AU - Hen, O.
AU - Piasetzky, E.
AU - Sabo-Napadensky, I.
AU - Steinberg, H.
AU - Beck, S. May Tal
AU - Ron, G.
N1 - Publisher Copyright: © 2019 Author(s).
PY - 2019/12/27
Y1 - 2019/12/27
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85077911712&partnerID=8YFLogxK
U2 - https://doi.org/10.1063/1.5135841
DO - https://doi.org/10.1063/1.5135841
M3 - منشور من مؤتمر
T3 - AIP Conference Proceedings
BT - 18th International Conference on Positron Annihilation, ICPA 2018
T2 - 18th International Conference on Positron Annihilation: Positron Annihilation Spectroscopy-Fundamentals, Techniques ad Applications, ICPA 2018
Y2 - 19 August 2018 through 24 August 2018
ER -