NeuLAND: The high-resolution neutron time-of-flight spectrometer for R3B at FAIR

Research output: Contribution to journalResearch articleContributedpeer-review


  • GSI Helmholtz Centre for Heavy Ion Research
  • Ruder Boskovic Institute
  • Technische Universität Darmstadt
  • University of Cologne
  • Chalmers University of Technology
  • RAS - Saint Petersburg Nuclear Physics Institute
  • Helmholtz Research Academy Hesse for FAIR (HFHF)
  • Goethe University Frankfurt a.M.
  • Saha Institute of Nuclear Physics
  • Institute for Space Sciences
  • Russian Research Centre Kurchatov Institute
  • National Institute for Nuclear Physics
  • University of Groningen
  • Hungarian Academy of Sciences
  • Laboratory for Instrumentation and Experimental Particle Physics
  • University of Lisbon
  • University of Catania
  • Instituto Galego de Física de Altas Enerxías (IGFAE)
  • Eotvos Lorand University


NeuLAND (New Large-Area Neutron Detector) is the next-generation neutron detector for the R3B (Reactions with Relativistic Radioactive Beams) experiment at FAIR (Facility for Antiproton and Ion Research). NeuLAND detects neutrons with energies from 100 to 1000 MeV, featuring a high detection efficiency, a high spatial and time resolution, and a large multi-neutron reconstruction efficiency. This is achieved by a highly granular design of organic scintillators: 3000 individual submodules with a size of 5 × 5 × 250 cm3 are arranged in 30 double planes with 100 submodules each, providing an active area of 250 × 250 cm2 and a total depth of 3 m. The spatial resolution due to the granularity together with a time resolution of σt≤ 150 ps ensures high-resolution capabilities. In conjunction with calorimetric properties, a multi-neutron reconstruction efficiency of 50% to 70% for four-neutron events will be achieved, depending on both the emission scenario and the boundary conditions allowed for the reconstruction method. We present in this paper the final design of the detector as well as results from test measurements and simulations on which this design is based.


Original languageEnglish
Article number165701
Pages (from-to)1-19
Number of pages19
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 21 Oct 2021



  • High-energy neutron detection, Multi-neutron detection, Plastic scintillator array, Reactions with relativistic radioactive beams

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