Harald Herborg Nielsen

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Harald Herborg Nielsen (born January 25, 1903 in Menominee , Michigan , † January 8, 1973 ) was an American physicist .

Nielsen was the son of Danish immigrants and, after completing his doctorate in physics at the University of Michigan in 1929 (dissertation title: Infrared absorption bands in hydrogen sulphide ), went to Niels Bohr in Copenhagen as an American-Scandinavian Fellow for a year . From 1930 he was at Ohio State University , where he became a professor in 1943. From 1946 to 1967 he headed the physics faculty there.

In 1949/50 he was a Guggenheim Fellow in Cambridge and in 1952/53 he was a science attaché at the US Embassy in Stockholm . In 1958/59 he was a Fulbright Lecturer at the Sorbonne .

Nielsen dealt with infrared molecular spectra and developed high resolution spectrographs. He was editor of the Journal of Molecular Spectroscopy . He was also a Fellow of the American Physical Society , Knight of the Belgian Leopold Order and the Danish Dannebrog Order.

His brother Alvin H. Nielsen (1910-1984) was also a well-known physicist who dealt with molecular spectroscopy and taught at the University of Tennessee. He was an honorary doctorate from the University of Dijon.

The moon crater Nielsen has been named after him and the Danish astronomer Axel Vilfrid Nielsen since 1973 .

Fonts

  • The vibration-rotation energies of molecules and their spectra in the infrared, Handbuch der Physik , Volume 37-1, 1959
  • with G. Amat, G. Tarrago: Rotation-vibration of polyatomic molecules; higher order energies and frequencies of spectral transitions, New York: Marcel Dekker 1971

literature

  • Dudley Williams, Obituary in Journal of the Optical Society of America, Vol. 63, 1973, p. 638

Individual evidence

  1. ↑ Partially published in Nielsen, Ernest F. Barker Infrared absorption bands in hydrogen sulphide , Phys. Rev. Volume 37, 1931, p. 727, abstract
personal data
SURNAME Nielsen, Harald Herborg
BRIEF DESCRIPTION American physicist
DATE OF BIRTH January 25, 1903
PLACE OF BIRTH Menominee , Michigan
DATE OF DEATH January 8, 1973