Pulsed Neutron Scattering |
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Page 39
... lose energy by an amount ho = E , - E ,. The scattering law can be written as a series of d functions at energy transfers ho E , E , weighted by the Boltzmann factors of the initial states -- = P1 = exp ( − E1 / kT ) [ exp ( − E ...
... lose energy by an amount ho = E , - E ,. The scattering law can be written as a series of d functions at energy transfers ho E , E , weighted by the Boltzmann factors of the initial states -- = P1 = exp ( − E1 / kT ) [ exp ( − E ...
Page 43
... energy loss should be of order 0.5E 。. Low Q values are achieved by forward scattering at low values of p . It is equally important to understand the scattering triangles obtained when we fix the scattered neutron energy E1 h2 Q2 = 2m ...
... energy loss should be of order 0.5E 。. Low Q values are achieved by forward scattering at low values of p . It is equally important to understand the scattering triangles obtained when we fix the scattered neutron energy E1 h2 Q2 = 2m ...
Page 371
... energy is accurately known , and vanadium calibration is unnecessary . The scattered flight path L , must be precisely known . If the vanadium ... Energy Loss Elastic Energy Gain 020 ਰਨਰਵ , Inverted geometry inelastic spectrometers 371.
... energy is accurately known , and vanadium calibration is unnecessary . The scattered flight path L , must be precisely known . If the vanadium ... Energy Loss Elastic Energy Gain 020 ਰਨਰਵ , Inverted geometry inelastic spectrometers 371.
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 |