Pulsed Neutron Scattering |
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Page 298
... rotor for epithermal neutron energies . We have to consider the ' lighthouse effect ' . The triangular transmission function of the rotor sweeps across the square source of the moderator . The important parameters are the angular width ...
... rotor for epithermal neutron energies . We have to consider the ' lighthouse effect ' . The triangular transmission function of the rotor sweeps across the square source of the moderator . The important parameters are the angular width ...
Page 299
... rotor must be taken into account by a factor Weff / W . We multiply by an ' energy window ' equal to the energy ... rotor depends on that from a single slit ( w / 2v , ) augmented by the function p ( u ) depending on u = WW m Lo D ' the ...
... rotor must be taken into account by a factor Weff / W . We multiply by an ' energy window ' equal to the energy ... rotor depends on that from a single slit ( w / 2v , ) augmented by the function p ( u ) depending on u = WW m Lo D ' the ...
Page 302
... rotor with moderator focused for 250 meV incident energy transfer . At this energy the epithermal moderation time Atm = 4 μs , and the sweep time 4.66 μs . 8.2 . Inelastic rotor spectrometers These have proved themselves from the ...
... rotor with moderator focused for 250 meV incident energy transfer . At this energy the epithermal moderation time Atm = 4 μs , and the sweep time 4.66 μs . 8.2 . Inelastic rotor spectrometers These have proved themselves from the ...
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 |