Inelastic nuclear resonant scattering with sub-meV energy resolution

1997 ◽  
Vol 71 (15) ◽  
pp. 2112-2114 ◽  
Author(s):  
T. S. Toellner ◽  
M. Y. Hu ◽  
W. Sturhahn ◽  
K. Quast ◽  
E. E. Alp
Keyword(s):  
Energy Resolution ◽  
Resonant Scattering ◽  
Nuclear Resonant Scattering ◽  
Inelastic Nuclear Resonant Scattering

MAGNETISM AND LATTICE DYNAMICS OF NANOSCALE STRUCTURES STUDIED BY NUCLEAR RESONANT SCATTERING OF SYNCHROTRON RADIATION

2005 ◽  
Vol 04 (05n06) ◽  
pp. 975-986
Author(s):  
RALF RÖHLSBERGER
Keyword(s):  
Synchrotron Radiation ◽  
Lattice Dynamics ◽  
Spin Structure ◽  
Resonant Scattering ◽  
Nuclear Resonant Scattering ◽  
Nanoscale Systems ◽  
Nanoscale Structures ◽  
Radiation Sources ◽  
Magnetic Spin ◽  
Inelastic Nuclear Resonant Scattering

Nuclear resonant scattering of synchrotron radiation is applied to investigate the magnetic structure and the lattice dynamics of nanoscale systems. The outstanding brilliance of modern synchrotron radiation sources allows for sensitivities to smallest amounts of material. Due to the isotopic sensitivity of the scattering process, ultrathin probe layers of Mössbauer isotopes can be used to map out the magnetic and vibrational structure of thin films with sub-nm spatial resolution. Elastic nuclear resonant scattering is applied to determine the magnetic spin structure of an exchange-coupled bilayer system. Inelastic nuclear resonant scattering was used to determine the vibrational density of states in Fe islands on the W(110) surface.

Phonon Density of States Measured by Inelastic Nuclear Resonant Scattering

1995 ◽  
Vol 74 (19) ◽  
pp. 3832-3835 ◽  
Author(s):  
W. Sturhahn ◽  
T. S. Toellner ◽  
E. E. Alp ◽  
X. Zhang ◽  
M. Ando ◽  
...  
Keyword(s):  
Density Of States ◽  
Resonant Scattering ◽  
Nuclear Resonant Scattering ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Inelastic Nuclear Resonant Scattering

An Inelastic Nuclear Resonant Scattering Study of Partial Entropies of Ordered and Disordered Fe3Al

1999 ◽  
Vol 590 ◽  
Author(s):  
B. Fultz ◽  
W. Sturhahn ◽  
T. S. Toellner ◽  
E. E. Alp
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Resonant Scattering ◽  
Nuclear Resonant Scattering ◽  
Range Order ◽  
Vibrational Entropy ◽  
Model Calculations ◽  
Optical Modes ◽  
Scattering Spectra ◽  
Inelastic Nuclear Resonant Scattering

ABSTRACTInelastic nuclear resonant scattering spectra were measured on alloys of Fe3Al that were chemically disordered, partially-ordered, and DO3-ordered. The phonon partial DOS for 57Fe atoms were extracted from these data, and the change upon disordering in the partial vibrational entropy of Fe atoms was obtained. By comparison to previous calorimetry measurements, it is shown that the contribution of the Fe atoms to the vibrational entropy is a factor of 10 smaller than that of the Al atoms. With the assistance of Born – von Kárán model calculations on the ordered alloy, it is shown that differences in the vibrational entropy originate primarily with changes in the optical modes upon disordering. The phonon DOS of 57Fe was found to change systematically with chemical short range order in the alloy. It is argued that changes in the vibrational entropy originate primarily with changes in the chemical short-range order in the alloy, as opposed to long-range order.

High-energy-resolution monochromator for 83Kr nuclear resonant scattering

2002 ◽  
Vol 73 (3) ◽  
pp. 1608-1610 ◽  
Author(s):  
J. Y. Zhao ◽  
T. S. Toellner ◽  
M. Y. Hu ◽  
W. Sturhahn ◽  
E. E. Alp ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Resonant Scattering ◽  
High Energy ◽  
Nuclear Resonant Scattering ◽  
High Energy Resolution

Inelastic nuclear resonant scattering at the Advanced Photon Source (invited)

1996 ◽  
Vol 67 (9) ◽  
pp. 3362-3362
Author(s):  
W. Sturhahn ◽  
T. S. Toellner ◽  
K. W. Quast ◽  
R. Röhlsberger ◽  
E. E. Alp
Keyword(s):  
Resonant Scattering ◽  
Nuclear Resonant Scattering ◽  
Inelastic Nuclear Resonant Scattering ◽  
Photon Source
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