Pulsed neutron scattering

absorber absorption accelerator atoms background beam tube beryllium Bragg reflection calculated cell collimation count-rate counter bank cross-section crystal analyser crystal monochromator curve defined density depends detector diffraction diffractometer direct geometry distance distribution dose effect efficiency elastic energy loss energy transfer epithermal equation fast neutrons figure of merit fission function give given Harwell hydrogen incident beam incident energy incident flight path incident neutron incoherent incoherent scattering intensity linac magnetic Maxwellian measured neutron beam neutron scattering neutron source nuclear nuclei phonon polarization proton pulse width pulsed neutron pulsed reactor pulsed source Q values radiation range ratio reciprocal lattice reciprocal space reflector resolution element resonance rotor sample scattered flight path scattering angle scattering length scattering vector Section shielding shown in figure shows single crystal slab moderator slit solid angle spectrometer spectrum spin spread target temperature thermal thickness time-of-flight transmission typical unit vanadium velocity vibrational wave-vector wavelength y-rays