Pulsed Neutron Scattering |
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Page 33
... atoms across have complete order . structureless . There is , on the contrary , as figure 1.27 shows , a continuous range of structures from a random network of atoms ( i ) , to a network of structural units ( ii ) , to a structure ...
... atoms across have complete order . structureless . There is , on the contrary , as figure 1.27 shows , a continuous range of structures from a random network of atoms ( i ) , to a network of structural units ( ii ) , to a structure ...
Page 52
... atoms in their equilibrium positions . ( i ) Consider a linear chain with forces only between nearest neighbours . If the force constant is a , and the atoms have small displacements u , the equation of motion of the nth atom is mü ...
... atoms in their equilibrium positions . ( i ) Consider a linear chain with forces only between nearest neighbours . If the force constant is a , and the atoms have small displacements u , the equation of motion of the nth atom is mü ...
Page 55
... atoms within a molecule . Polycrystalline or liquid samples may be used . Incoherent cross - sections suffice . Before the molecular frequencies can be used to deduce the molecular force field , the modes must be assigned . We must know ...
... atoms within a molecule . Polycrystalline or liquid samples may be used . Incoherent cross - sections suffice . Before the molecular frequencies can be used to deduce the molecular force field , the modes must be assigned . We must know ...
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 |