Career Achievements of Professor Lothar Frommholdstaff.maggus/ICSLS20frommhold.pdf · Career...
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Career Achievements of Professor Lothar Frommhold
Magnus Gustafsson
20th International Conference on Spectral Line ShapesMemorial University of Newfoundland
June 8, 2010
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The years at the University of Hamburg
I Undergraduate studies in Physics and Applied Mathematics
I 1956: Master’s degree in Physics
I 1959: PhD in Physics
I 1959–1964: Research Associate
I 1964: Dr. habil. degree
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The years in the USA
University of Pittsburgh
I 1964–1966: Research Associate
I 1966: Research Professor
University of Texas at Austin
I 1966–1970: Associate Professor
I 1970–present: Full Professor
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Main research areas
(the years are approximate)
I 1956–1974: gas discharges, negative ions, afterglows and dissociativerecombination
I 1972(after some coercion by R.B. Bernstein)–present:collision-induced light scattering
I 1981–present: collision-induced absorption
I 1994–2002: light emitting processes in sonoluminescence
More than 150 refereed publications
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The career also includes:
I A book on collision-induced absorption,on request by A. Dalgarno
(Cambridge University Press, 1993/2006)
I Lothar and Roger Herman brought collision-induced spectroscopy intothe ICSLS in 1988
I Organizer of the 1990 ICSLS in Austin, TexasI Visiting professor at:
I National Bureau of Standards (Washington DC, 1982)I Universidad Nazional (Bogota, Colombia, 1971)I University of Kaiserslautern and Bielefeld (Germany)
I Elected APS fellow since 1971
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Collision-induced absorption in hydrogen
W. Meyer, L. Frommhold, and G. Birnbaum, Phys. Rev. A 1989
I Dots: measurement
I Curves: calculation
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Dimer features in the hydrogen spectrum
I H2 S(0) transition (j : 0→ 2) at354.4 cm−1
I Left of S(0): H2+H2+~ω → (H2)2
I Right of S(0): (H2)2+~ω → H2+H2
I Thick solid curve: Convolution withslit function to simulate the resolutionof the Voyager spectrometer that hasrecorded the Jupiter spectrum
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Emission from Jupiter - recorded by Voyager
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Depolarized Rayleigh scattering in hydrogen
M. Moraldi, A. Borysow, and L. Frommhold, Phys. Rev. A 1989
Experiment (Le Duff and Ouillon):
I Circles: para-H2
I Dots: normal-H2
Calculations:
I Lower curves: para- andnormal-H2 collision-inducedlight scattering
I Upper curve: Rayleigh pluscollision-induced for normal-H2
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Sonoluminescence
D. Hammer and L. Frommhold, Phys. Rev. Lett. 2000
Spectra of rare-gas bubbles at 20◦C:
I solid: experimental for 3He, He, Ne, Ar, Kr, and Xe (Barber et al.)
I dashed: calculated
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Intracollisional interference of HD in a He bath
M. Gustafsson and L. Frommhold, Phys. Rev. A 2001
Experiment (McKellar andRich):
I solid: 1 amagat
I short dashed: 29.4amagats
I long dashed: 205amagats
Calculation representing thelow-pressure limit:
I dots
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Happy Birthday Lothar!
We are looking forward to following yourresearch activities in the years to come.
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