Pulsed Neutron Scattering |
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Page 53
... phonon intensities Phonon frequencies give us information on force constants . Phonon intensities give us information on the eigenvectors of the mode — the way the atoms are vibrating . This can be extremely useful in ensuring that we ...
... phonon intensities Phonon frequencies give us information on force constants . Phonon intensities give us information on the eigenvectors of the mode — the way the atoms are vibrating . This can be extremely useful in ensuring that we ...
Page 54
... Phonon peaks in an aluminium single crystal measured on the IBR - 30 pulsed reactor at Dubna . The counts are per 20 hours . The lower scale is a wavelength scale in Angstrom units ( 1Å = 0 · 1 nm ) . ( From Maliszowski et al.53 ...
... Phonon peaks in an aluminium single crystal measured on the IBR - 30 pulsed reactor at Dubna . The counts are per 20 hours . The lower scale is a wavelength scale in Angstrom units ( 1Å = 0 · 1 nm ) . ( From Maliszowski et al.53 ...
Page 295
... phonon creation ( energy loss ) , or 1 for phonon destruction ( energy gain ) . If ko is given , the energy conservation condition determines the crystallite angle a at which scattering can occur . Thus , k , is determined and the phonon ...
... phonon creation ( energy loss ) , or 1 for phonon destruction ( energy gain ) . If ko is given , the energy conservation condition determines the crystallite angle a at which scattering can occur . Thus , k , is determined and the phonon ...
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 |