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The response of lead-tungstate scintillators (PWO) to photons with energies in the range 13 MeV-64 MeV

von Wurtemberg, K. Marcks; Geren, L.; Lundberg, O.; Tegner, P-E.; Fransson, K.; Grape, S.; Johansson, T.; Thome, E.; Wolke, M. and Brudvik, Jason LU , et al. (2012) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment 679. p.36-43
Abstract
The response of a matrix of 25 lead tungstate (PWO) scintillator detectors, operated at -25 degrees C, to photons in the range 13 MeV-64 MeV has been measured at the tagged-photon facility at MAX-lab, Lund. The tapered PWO crystals, each with a length of 200 mm and a cross-section of 24.4 x 24.4 mm(2) in the front end, read out by 19 mm photomultiplier tubes, were arranged in a 5 x 5 matrix. The response was measured for photons directed towards the centre of the central crystal as well as for photons directed towards the corner of the central crystal, where four crystals meet. The obtained energy resolution surpasses what has been published so far and is close to the limit given by Poisson statistics and escaped energy. For photons... (More)
The response of a matrix of 25 lead tungstate (PWO) scintillator detectors, operated at -25 degrees C, to photons in the range 13 MeV-64 MeV has been measured at the tagged-photon facility at MAX-lab, Lund. The tapered PWO crystals, each with a length of 200 mm and a cross-section of 24.4 x 24.4 mm(2) in the front end, read out by 19 mm photomultiplier tubes, were arranged in a 5 x 5 matrix. The response was measured for photons directed towards the centre of the central crystal as well as for photons directed towards the corner of the central crystal, where four crystals meet. The obtained energy resolution surpasses what has been published so far and is close to the limit given by Poisson statistics and escaped energy. For photons directed towards the centre(corner) of the central crystal the relative energy resolution, defined as (FWHM/2.35)/E-gamma, decreases from 7.3%(11.0%) at E-gamma = 13 MeV to 3.3%(3.6%) at E-gamma = 64 MeV. The reconstructed point of impact of a photon in this energy range is determined with an uncertainty (one standard deviation) of 7.3 +/- 0.1 mm. (C) 2012 Elsevier B.V. All rights reserved. (Less)
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keywords
Lead tungstate, PWO scintillators, Electromagnetic calorimeter, PANDA, Tagged photons
in
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
679
pages
36 - 43
publisher
Elsevier
external identifiers
  • wos:000304503400007
  • scopus:84859627126
ISSN
0167-5087
DOI
10.1016/j.nima.2012.03.030
language
English
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yes
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9d37e1d7-21d4-46fd-a576-07c3b9460c93 (old id 2906440)
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2012-07-23 16:17:00
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@article{9d37e1d7-21d4-46fd-a576-07c3b9460c93,
  abstract     = {The response of a matrix of 25 lead tungstate (PWO) scintillator detectors, operated at -25 degrees C, to photons in the range 13 MeV-64 MeV has been measured at the tagged-photon facility at MAX-lab, Lund. The tapered PWO crystals, each with a length of 200 mm and a cross-section of 24.4 x 24.4 mm(2) in the front end, read out by 19 mm photomultiplier tubes, were arranged in a 5 x 5 matrix. The response was measured for photons directed towards the centre of the central crystal as well as for photons directed towards the corner of the central crystal, where four crystals meet. The obtained energy resolution surpasses what has been published so far and is close to the limit given by Poisson statistics and escaped energy. For photons directed towards the centre(corner) of the central crystal the relative energy resolution, defined as (FWHM/2.35)/E-gamma, decreases from 7.3%(11.0%) at E-gamma = 13 MeV to 3.3%(3.6%) at E-gamma = 64 MeV. The reconstructed point of impact of a photon in this energy range is determined with an uncertainty (one standard deviation) of 7.3 +/- 0.1 mm. (C) 2012 Elsevier B.V. All rights reserved.},
  author       = {von Wurtemberg, K. Marcks and Geren, L. and Lundberg, O. and Tegner, P-E. and Fransson, K. and Grape, S. and Johansson, T. and Thome, E. and Wolke, M. and Brudvik, Jason and Fissum, Kevin and Hansen, Kurt and Isaksson, Lennart and Lundin, Magnus and Schröder, Bent},
  issn         = {0167-5087},
  keyword      = {Lead tungstate,PWO scintillators,Electromagnetic calorimeter,PANDA,Tagged photons},
  language     = {eng},
  pages        = {36--43},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {The response of lead-tungstate scintillators (PWO) to photons with energies in the range 13 MeV-64 MeV},
  url          = {http://dx.doi.org/10.1016/j.nima.2012.03.030},
  volume       = {679},
  year         = {2012},
}