Pulsed Neutron Scattering |
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Page 210
... give a good neutron efficiency cannot be reduced below a centimetre or so . The scintillator method uses a much denser neutron absorber to give comparable efficiencies within a few millimetres thickness . A typical absorber is " Li ...
... give a good neutron efficiency cannot be reduced below a centimetre or so . The scintillator method uses a much denser neutron absorber to give comparable efficiencies within a few millimetres thickness . A typical absorber is " Li ...
Page 307
... give a pulse width of 6.8 μs over a 400 cm2 area . The moderator was only 76 mm wide , to reduce the sweep - time of the rotor . The rotor could be phased to give incident energies between 200 and 600 meV with 2 to 3 % incident energy ...
... give a pulse width of 6.8 μs over a 400 cm2 area . The moderator was only 76 mm wide , to reduce the sweep - time of the rotor . The rotor could be phased to give incident energies between 200 and 600 meV with 2 to 3 % incident energy ...
Page 376
... give the time spread At , over which neutrons are being scat- tered by the sample . ( i ) the spread is very small for direct geometry inelastic spectrometers . ( ii ) Inverted geometry inelastic spectrometers have a wider window ...
... give the time spread At , over which neutrons are being scat- tered by the sample . ( i ) the spread is very small for direct geometry inelastic spectrometers . ( ii ) Inverted geometry inelastic spectrometers have a wider window ...
Common terms and phrases
absorption accelerator atoms background beam tube beryllium Bragg reflection calculated cell collimation count-rate counter bank cross-section crystal monochromator curve defined density depends detector diffraction diffractometer direct geometry distribution dose E₁ effective efficiency elastic electron linac energy transfer epithermal equation fast neutrons figure of merit fission function given gives Harwell hydrogen incident beam incident energy incident flight path incident neutron intensity k₁ L₁ 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 Qmax 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 slit solid angle spallation spectrometer spectrum spin target thermal thickness time-of-flight transmission typical vanadium velocity vibrational wave-vector wavelength y-rays Δι ΦΩ
References to this book
Polymers and Neutron Scattering Julia S. Higgins,Henri C. Benoît,Henri Benoît No preview available - 1996 |