Phonon densities of states of gamma-cerium and delta-cerium measured by time-of-flight inelastic neutron scattering

2000 ◽  
Vol 80 (8) ◽  
pp. 591-596 ◽  
Author(s):  
M.E. Manley ◽  
R.J. McQueeney ◽  
J.L. Robertson ◽  
B. Fultz ◽  
D.A. Neumann
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Time Of Flight ◽  
Inelastic Neutron ◽  
Densities Of States

Inelastic Neutron Scattering by Pristine And Doped Phases of Polyacetylene

1994 ◽  
Vol 376 ◽  
Author(s):  
P. Papanek ◽  
J. E. Fischer ◽  
J. L. Sauvajou ◽  
A. J. Dianoux ◽  
P. M. Mcneillis ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Time Of Flight ◽  
Inelastic Neutron ◽  
Vibrational Modes ◽  
Incoherent Neutron Scattering ◽  
Oriented Samples ◽  
Scattering Spectra ◽  
Incoherent Neutron

ABSTRACTInelastic incoherent neutron-scattering spectra of cis-, trans- and Na-doped polyacety-lene are presented. The experiments were performed with time-of-flight and filter-analyzer spectrometers on stretch-oriented samples such that the polarization of vibrational modes could also be determined.

UB matrix implementation for inelastic neutron scattering experiments

2005 ◽  
Vol 38 (3) ◽  
pp. 405-411 ◽  
Author(s):  
M. D. Lumsden ◽  
J. L. Robertson ◽  
M. Yethiraj
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Time Of Flight ◽  
Inelastic Neutron ◽  
Energy Space ◽  
Matrix Approach ◽  
Energy Position

The UB matrix approach has been extended to handle inelastic neutron scattering experiments with differing k_{\rm i} and k_{\rm f}. We have considered the typical goniometer employed on triple-axis and time-of-flight spectrometers. Expressions are derived to allow for calculation of the UB matrix and for converting from observables to Q-energy space. In addition, we have developed appropriate modes for calculation of angles for a specified Q-energy position.

scholarly journals Design and operating characteristic of a vacuum furnace for time-of-flight inelastic neutron scattering measurements

2017 ◽  
Vol 88 (10) ◽  
pp. 105116 ◽  
Author(s):  
J. L. Niedziela ◽  
R. Mills ◽  
M. J. Loguillo ◽  
H. D. Skorpenske ◽  
D. Armitage ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Operating Characteristic ◽  
Inelastic Neutron Scattering ◽  
Time Of Flight ◽  
Inelastic Neutron ◽  
Vacuum Furnace ◽  
Scattering Measurements

Spurious peaks arising from multiple scattering events involving the sample environment in inelastic neutron scattering

2014 ◽  
Vol 47 (4) ◽  
pp. 1472-1476 ◽  
Author(s):  
Lothar Pintschovius ◽  
Dmitry Reznik ◽  
Frank Weber ◽  
Philippe Bourges ◽  
D. Parshall ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Single Crystals ◽  
Multiple Scattering ◽  
High Intensity ◽  
Inelastic Neutron Scattering ◽  
Time Of Flight ◽  
Inelastic Neutron ◽  
Small Samples ◽  
Sample Environment ◽  
Scattering Events

Well defined peaks with energies of about 18 meV have been observed in a variety of inelastic neutron scattering experiments on both single crystals and powders, using either the triple-axis or the time-of-flight technique. They can easily be mistaken for signatures of real excitations. It has been found that they are due to multiple scattering events involving primarily the walls of the sample environment. Hence, they are particularly troublesome in experiments using very small samples, as have been used with recently developed high-intensity neutron spectrometers. Measures required to reduce the unwanted scattering to a minimum are also discussed.

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