STUDY OF THE QUADRUPOLE INTERACTION OF 125Te AND 129I IN Te SINGLE CRYSTALS BY MÖSSBAUER SPECTROSCOPY

1974 ◽  
Vol 35 (C1) ◽  
pp. C1-55-C1-55
Author(s):  
G. LANGOUCHE ◽  
R. COUSSEMENT ◽  
M. VAN ROSSUM ◽  
K. P. SCHMIDT
Keyword(s):  
Mössbauer Spectroscopy ◽  
Single Crystals ◽  
Quadrupole Interaction ◽  
Mossbauer Spectroscopy ◽  
Mößbauer Spectroscopy

scholarly journals The Problem of Texture in Mössbauer Spectroscopy

Texture ◽  
1974 ◽  
Vol 1 (4) ◽  
pp. 259-263 ◽  
Author(s):  
E. Kreber ◽  
U. Gonser
Keyword(s):  
Mössbauer Spectroscopy ◽  
Single Crystals ◽  
Barium Ferrite ◽  
Mossbauer Spectroscopy ◽  
Polycrystalline Material ◽  
Random Orientation ◽  
Line Intensities ◽  
Mößbauer Spectroscopy ◽  
Texture Information ◽  
Relative Line

In Mössbauer spectroscopy it is desirable to work with single crystals or with polycrystalline material of random orientation. The actual, most occuring, case of preferred orientation (texture) and its influence on the relative line intensities of hyperfine split Mössbauer spectra is analysed. Texture information which can be obtained from such an analysis is demonstrated with variously prepared barium ferrite (Ba Fe12 O19) samples.

scholarly journals Quadrupole Interaction at Surfaces -Nuclear Methods

1994 ◽  
Vol 49 (1-2) ◽  
pp. 407-417 ◽  
Author(s):  
H. Haas
Keyword(s):  
Mössbauer Spectroscopy ◽  
Quadrupole Interaction ◽  
Mossbauer Spectroscopy ◽  
Electric Quadrupole ◽  
Electric Quadrupole Interaction ◽  
Metallic Surfaces ◽  
Stepped Surfaces ◽  
Mößbauer Spectroscopy ◽  
Field Gradients ◽  
Nuclear Techniques

Abstract The measurement of the electric quadrupole interaction with nuclear techniques allows the study of monolayer coverages or even isolated atoms at surfaces and interfaces due to the inherent sensitivity of these methods. Recently electric field gradients at surface atoms have been investigated with Mößbauer Spectroscopy, Polarized Beam NMR , and Perturbed Angular Correlation (PAC). The highly sensitive PAC technique with 111In and 111mCd sources, in particular, has been applied to several metal and semiconductor surfaces. The use of flat as well as stepped surfaces has allowed the assignment of the measured quadrupole interaction frequencies to specific surface sites. For the Pd(111) surface a particularly complete description is possible, since for five different sites (terrace adatoms, ledge adatoms, kink adatoms, ledge and terrace atoms) the field gradients and their orientation could be determined. They represent a challenging problem for understanding the electronic structure of metallic surfaces. Through the study of the temperature dependence of the different components the diffusion of the radioactive probe atoms can be followed. The data from 57Fe Mößbauer spectroscopy on iron surfaces with monolayer coverage and NMR surface studies of 7Li and 23Na at high temperatures are reviewed. An outlook for further developments of the nuclear techniques is presented, particularly in view of the variety of radioactive isotope beams available from on-line isotope separators like the ISOLDE facility at CERN.

Effect of oxygen annealing on single crystals of YBa 2 (Cu 1−x Fe x ) 3 O 7−y : Mossbauer spectroscopy

1989 ◽  
Vol 162-164 ◽  
pp. 37-38
Author(s):  
I.V. Zubov ◽  
A.S. Ilyushin ◽  
R.N. Kuz'min ◽  
V.S. Moisa ◽  
A.A. Novakova ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Single Crystals ◽  
Mossbauer Spectroscopy ◽  
Oxygen Annealing ◽  
Mößbauer Spectroscopy ◽  
Effect Of Oxygen
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