Pulsed Neutron Scattering |
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Page 124
... thickness , but is very broad . The pulse widths increase only rather slowly with thickness at these epithermal energies , and the figure of merit analysis therefore gives only a slightly lower optimum thickness . Data from several ...
... thickness , but is very broad . The pulse widths increase only rather slowly with thickness at these epithermal energies , and the figure of merit analysis therefore gives only a slightly lower optimum thickness . Data from several ...
Page 182
... thickness z is critical in giving a reasonable transmission at the shorter pulse times . The optimum neutron chopper performance Suppose we have a Fermi chopper of a given diameter D and peripheral speed Up with N absorbers of a given ...
... thickness z is critical in giving a reasonable transmission at the shorter pulse times . The optimum neutron chopper performance Suppose we have a Fermi chopper of a given diameter D and peripheral speed Up with N absorbers of a given ...
Page 217
... thickness d as shown inset in figure 5.23 ( i ) . We then look at a thin slice of the volume distance x from the surface and of thickness dx . The neutron flux n ( x ) across the slice will be reduced by бп = - Sn Non ( x ) dx ( 5.6 ) ...
... thickness d as shown inset in figure 5.23 ( i ) . We then look at a thin slice of the volume distance x from the surface and of thickness dx . The neutron flux n ( x ) across the slice will be reduced by бп = - Sn Non ( x ) dx ( 5.6 ) ...
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 |