Pulsed Neutron Scattering |
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Page 55
... Hydrogen atoms show up preferentially . The large incoherent cross- section of hydrogen ( 80 × 10-28 m2 ) and its low mass ensure that its vibrations dominate the scattering law of organic compounds . We observe a hydrogen- amplitude ...
... Hydrogen atoms show up preferentially . The large incoherent cross- section of hydrogen ( 80 × 10-28 m2 ) and its low mass ensure that its vibrations dominate the scattering law of organic compounds . We observe a hydrogen- amplitude ...
Page 116
... Hydrogen's large scattering cross - section gives hydrogenous materials a big advantage over all other materials . Hydrogen atom density is often used to classify possible materials . Most solid hydrocarbons have a comparable hydrogen ...
... Hydrogen's large scattering cross - section gives hydrogenous materials a big advantage over all other materials . Hydrogen atom density is often used to classify possible materials . Most solid hydrocarbons have a comparable hydrogen ...
Page 129
Colin G. Windsor. Table 3.3 . Cold moderators . Hydrogen density nm -3 Lowest energy levels meV TM Тв 2.5 195 240 Ammonia Polyethylene 79 888888 Methane Hydrogen 78 17 90 112 42 ~ 0 20.4 value above a certain wavelength . This occurs ...
Colin G. Windsor. Table 3.3 . Cold moderators . Hydrogen density nm -3 Lowest energy levels meV TM Тв 2.5 195 240 Ammonia Polyethylene 79 888888 Methane Hydrogen 78 17 90 112 42 ~ 0 20.4 value above a certain wavelength . This occurs ...
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 |