Pulsed Neutron Scattering |
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Page 55
... vibrational states Z ( ∞ ) weighted by these factors . b2 Ρ 2W Z ( w ) ho S ( Q , 0 ) = ΣM Q2 < u , > 2e - 2w w ) ( 1.47 ) Several very simple vibrations forbidden by optical techniques are allowed in neutron vibrational spectroscopy ...
... vibrational states Z ( ∞ ) weighted by these factors . b2 Ρ 2W Z ( w ) ho S ( Q , 0 ) = ΣM Q2 < u , > 2e - 2w w ) ( 1.47 ) Several very simple vibrations forbidden by optical techniques are allowed in neutron vibrational spectroscopy ...
Page 118
... Vibrational states . The lower the neutron energy , the less it will ' see ' the moderator as a billiard ball gas . The balls become firmly bound by the springs of interatomic forces . They will be vibrating in the crystals ' normal ...
... Vibrational states . The lower the neutron energy , the less it will ' see ' the moderator as a billiard ball gas . The balls become firmly bound by the springs of interatomic forces . They will be vibrating in the crystals ' normal ...
Page 338
... vibrational studies188 A crystal set to reflect neutrons of relatively high energy forms the basis of a very simple spectrometer for measuring the vibrational density of states at low scattering vectors Q. For this application , the ...
... vibrational studies188 A crystal set to reflect neutrons of relatively high energy forms the basis of a very simple spectrometer for measuring the vibrational density of states at low scattering vectors Q. For this application , 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 |