Pulsed Neutron Scattering |
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Page 210
... efficiency cannot be reduced below a centimetre or so . The scintillator method uses a much denser neutron absorber to give comparable efficiencies within a few millimetres thickness . A typical absorber is " Li . The reaction products ...
... efficiency cannot be reduced below a centimetre or so . The scintillator method uses a much denser neutron absorber to give comparable efficiencies within a few millimetres thickness . A typical absorber is " Li . The reaction products ...
Page 217
... efficiencies , positions and widths Suppose we have a gas counter or scintillator with a known neutron cross- section per unit volume . What is its efficiency ? What is the mean position at which neutrons are detected ? What is the ...
... efficiencies , positions and widths Suppose we have a gas counter or scintillator with a known neutron cross- section per unit volume . What is its efficiency ? What is the mean position at which neutrons are detected ? What is the ...
Page 219
... efficiency should be close to 100 % only for high signal to background ratio experiments . For low signal to background experiments , efficiencies in the range 50 to 90 % are most appropriate 140 . ( ii ) Consider a gas counter with a ...
... efficiency should be close to 100 % only for high signal to background ratio experiments . For low signal to background experiments , efficiencies in the range 50 to 90 % are most appropriate 140 . ( ii ) Consider a gas counter with a ...
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 |