Properties of the CsI(Tl) detector elements of the CALIFA detector

Research output: Contribution to journalArticle


In the RB experiment at FAIR, charged particles with energies up to 600 MeV and forward boosted -rays with energies up to 20 MeV need to be detected in scattering experiments. Calorimeters for nuclear physics experiments of this kind, using relativistic radioactive ion beams, require high energy resolution and high efficiency for simultaneous detection of strongly Doppler shifted -rays and high-energy charged particles. A calorimeter design that can meet these requirements, using CsI(Tl) scintillators, results in detector elements that may exhibit light output variations with crystal depth, which can limit the attainable resolution. In this paper we present results from a systematic study of 478 detector modules of CALIFA, the RB calorimeter, in order to determine and minimize such variations. To facilitate further systematic studies we also present results for the total absorption length of the scintillation light, using spectrophotometry, light crosstalk between adjacent detector modules, and surface topography of the CsI(Tl) crystals from atomic force microscopy.


  • H Alvarez-Pol
  • P. Cabanelas
  • Enrique Casarejos
  • L. Causeret
  • D Cortina-Gil
  • P. Diaz Fernandez
  • M. Feijoo
  • D. Galaviz
  • E. Galiana
  • R. Gernhäuser
  • A. Hartig
  • A Heinz
  • B. Heiss
  • A. Ignatov
  • H. T. Johansson
  • P. Klenze
  • T. Kröll
  • T Nilsson
  • A. Perea
  • H. B. Rhee
  • O Tengblad
  • P. Teubig
External organisations
  • University of Vigo
  • University of Lisbon
  • Technical University of Darmstadt
  • Chalmers University of Technology
  • Technical University of Munich
  • CSIC Instituto de Estructura de la Materia (IEM)
  • Laboratory of Instrumentation and Experimental Particles Physics
  • University of Santiago de Compostela
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Pages (from-to) 393-404
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Publication statusPublished - 2019
Publication categoryResearch