IN4C - High-flux time-of-flight spectrometer

IN4C is a high-flux time-of-flight spectrometer used for the study of excitations in condensed matter. It works in the thermal neutron energy range (10-100 meV).


  • characterisation of interaction energies associated with bonding of atoms in solids and liquids;
  • measurement of the energy level spacing in magnetic ions and of interaction between them;
  • observation of the interaction of magnetic moments with their surrounding ions (crystal fields) or with conduction electrons (fluctuating valence, heavy fermions);
  • determination of vibrational states in amorphous solids and polycrystals;
  • examination of molecular excitations in various materials, also of technological interest (zeolites) and especially in diluted systems (matrix isolation).

Some parts of the instrument

When the shielding is open for maintenance, one can see the choppers, the inside of the detector tank and even the focusing monochromator.