0000000001033122

AUTHOR

S. De Panfilis

showing 2 related works from this author

Femtometer accuracy EXAFS measurements: Isotopic effect in the first, second and third coordination shells of germanium

2009

The analysis of the EXAFS signals from 70Ge and 76Ge has evidenced the low-temperature effect of isotopic mass difference on the amplitude of relative atomic vibrations. This effect is reflected in the difference of the Debye-Waller factors of the first three coordination shells, and on the difference of nearest-neighbour average interatomic distances, evaluated with femtometer accuracy. The experimental results are in agreement with theoretical expectations.

VibrationHistoryFemtometerAmplitudeExtended X-ray absorption fine structureChemistryPhysics::Atomic and Molecular ClustersAnalytical chemistrychemistry.chemical_elementGermaniumAtomic physicsComputer Science ApplicationsEducationJournal of Physics: Conference Series
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Isotopic Effect In Extended X-Ray-Absorption Fine Structure of Germanium

2008

Extended x-ray absorption fine structure has been measured on two powdered samples of 70Ge and 76Ge as a function of temperature from 20 to 300 K. The effect of isotopic mass difference on the amplitude of relative atomic vibrations is neatly evidenced by the temperature dependence of the difference of Debye-Waller factors. The isotopic effect is also detected on the difference of nearest-neighbor average ineratomic distances, thanks to a resolution better than 10 fm. (DOI: 10.1103/PhysRevLett.100.055901)

Materials scienceExtended X-ray absorption fine structureLATTICE-PARAMETERResolution (electron density)Analytical chemistryGeneral Physics and Astronomychemistry.chemical_elementGermaniumPHONONSAmplitudechemistryCONSTANTDEPENDENCESPECTRAAbsorption (logic)Atomic physics
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