Parents

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James Stark Koehler grad student 1957 UIUC
 (X-ray study of deuteron irradiated copper near 10°K)

Children

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Steven M Heald grad student 1976 UIUC
Benedick A. Fraass grad student 1980 UIUC
Paul E. Sokol post-doc 1982-1984 UIUC
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Publications

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Schell N, Simmons RO, Kaprolat A, et al. (2019) Electronic excitations in hcp 4He at 61.5 MPa and 4.3 K studied by inelastic x-ray scattering spectroscopy. Physical Review Letters. 74: 2535-2538
Fraass BA, Granfors PR, Simmons RO. (2019) X-ray measurements of thermal vacancies in hcp 4He. Physical Review. B, Condensed Matter. 39: 124-131
Fraass BA, Simmons RO. (2019) X-ray studies of high-temperature defects in concentrated isotopic helium solid solutions. Physical Review. B, Condensed Matter. 37: 5058-5069
Arms DA, Simmons RO, Schwoerer-Böhning M, et al. (2001) Exciton dispersion and electronic excitations in hcp 4He. Physical Review Letters. 87: 156402
Simmons RO. (1997) Defects in noble gas crystals Materials Chemistry and Physics. 50: 124-132
Schell N, Simmons RO, Burkel E. (1996) First observation of inelastic X-ray scattering from condensed (4)He using high energy resolution. Journal of Synchrotron Radiation. 3: 316-7
Ceperley DM, Simmons RO, Blasdell RC. (1996) Kinetic Energy of Liquid and Solid 4He. Physical Review Letters. 77: 115-118
Fradkin MA, Zeng S, Simmons RO. (1994) Temperature dependence of the kinetic energy in condensed argon. Physical Review. B, Condensed Matter. 49: 3197-3206
Fradkin MA, Zeng S, Simmons RO. (1994) Final-state effects in neutron scattering from liquid neon. Physical Review. B, Condensed Matter. 49: 15563-15572
Peek DA, Fujita I, Schmidt MC, et al. (1992) Single-particle kinetic energies in solid neon. Physical Review. B, Condensed Matter. 45: 9680-9687
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