The wavelength of the 14.4 keV Mössbauer radiation in _1hn5_1hn7Fe [Elektronische Ressource] : a novel length standard for atomic scales ; new measurements and first applications / vorgelegt von Martin Lucht

Martin Lucht57The Wavelength of the 14.4 keV Mossbauer¤ Radiation in Fe:A Novel Length Standard For Atomic ScalesiiiThe Wavelength of the14.4 keV Mossbauer¤ Radiation57in Fe:A Novel Length StandardFor Atomic ScalesNew Measurements and First ApplicationsDissertationzur Erlangung des Doktorgradesdes Fachbereichs Physikder Universitat¤ Hamburgvorgelegt vonMartin Luchtaus Lubeck¤Hamburg2005iGutachter der Dissertation: Dr. habil. Yuri V. Shvyd’koProf. Dr. Erich GerdauGutachter der Disputation: Dr. habil. Yuri V. Shvyd’koProf. Dr. Wilfried WurthDatum der Disputation: 11. 3. 2005Vorsitzender des Prufungsausschusses:¤ Prof. Dr. Gotz¤ HeinzelmannVorsitzender des Promotionsausschussesund Dekan des Fachbereichs Physik: Prof. Dr. Gunter¤ HuberivAbstract57The wavelength of the Mossbauer¤ radiation of Fe, , has been mea-Msured in an experiment using Bragg backscattering from a Si reference crys-tal with precisely known lattice spacing. The latest measured value, ob-tained at the 1 km beamline at SPring-8 (Hyogo, Japan) in the year 2002, is57 = 86.025 587 (26) pm. The wavelength of the Mossbauer¤ radiation of FeMis ideal as a new length standard for atomic scales due to its unique sharp-ness, stability and ease of reproduction. In other experiments the new lengthstandard has been successfully applied in the measurement of the lattice pa-rameters of Al O in the temperature range from 4.