A helium gas scintillator active target for photoreaction measurements

Research output: Contribution to journalArticle


A multi-cell He gas scintillator active target, designed for the measurement of photoreaction cross sections, is described. The target has four main chambers, giving an overall thickness of 0.103 g/cm(3) at an operating pressure of 2MPa. Scintillations are read out by photomultiplier tubes and the addition of small amounts of N-2 to the He, to shift the scintillation emission from UV to visible, is discussed. First results of measurements at the MAX IV Laboratory tagged-photon facility show that the target has a timing resolution of around 1 ns and can cope well with a high-flux photon beam. The determination of reaction cross sections from target yields relies on a Monte Carlo simulation, which considers scintillation light transport, photodisintegration processes in He-4, background photon interactions in target windows and interactions of the reaction-product particles in the gas and target container. The predictions of this simulation are compared to the measured target response.


  • Ramsey Al Jebali
  • John R. M. Annand
  • Iskender Akkurt
  • Emma Buchanan
  • Jason Brudvik
  • Simon Gardner
  • David J. Hamilton
  • Kurt Hansen
  • Kenneth Livingston
  • Magnus Lundin
  • John C. McGeorge
  • Ian J. D. MacGregor
  • Roderick MacRae
  • Duncan G. Middleton
  • Andreas J. H. Reiter
  • Guenther Rosner
  • Bent Schroder
  • Johan Sjögren
  • Daria Sokhan
  • Bruno Strandberg
External organisations
  • University of Glasgow
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Article number123
JournalEuropean Physical Journal A. Hadrons and Nuclei
Issue number10
Publication statusPublished - 2015
Publication categoryResearch

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Kevin Fissum, Hanno Perrey, Julius Scherzinger, Francesco Messi & Nicholai Mauritzson

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Project: Research

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