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.
Isotopic effect in extended x-ray-absorption fine structure of germanium / Purans, Juris; Afify, Nasser; Dalba, Giuseppe; Grisenti, Rolly; S., De Panfilis; A., Kuzmin; V., Ozhogin; F., Rocca; Sanson, Andrea; S., Tiutiunnikov; Fornasini, Paolo. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 100:5(2008), pp. 055901-1-055901-4. [10.1103/physRevLett 100.055901]
Isotopic effect in extended x-ray-absorption fine structure of germanium
Purans, Juris;Afify, Nasser;Dalba, Giuseppe;Grisenti, Rolly;Sanson, Andrea;Fornasini, Paolo
2008-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
