RESEARCH ACCOMPLISHMENTS

Conceived and demonstrated a new method to perform Moessbauer spectroscopy using high-speed shutters with synchtrotron radiation.

Current world-record holder in energy resolution (1.7x10⁸ ) achieved with crystal optics.

Developed the most efficient in-line 1-meV monochromator for synchrotron
radiation in the world.

Developed first cryogenically-stabilized meV monochromator for X rays.

Developed many milli-electron-Volt monochromators in use at various beamlines at the Advanced Photon Source.

Developed first X-ray monochromator to exceed energy resolution of 10⁷.

"Ultra-stable sub-meV monochromator for hard X-rays", T.S. Toellner et al., J. Synchrotron Rad. (2015), 22, 1155-1162.

"Six-reflection meV-monochromator for synchrotron radiation", T.S. Toellner et al., J. Synchrotron Rad. (2011), 18, 605-611.

"Synchrotron Moessbauer spectroscopy using high-speed shutters", T.S. Toellner et al., J. Synchrotron Rad. (2011) 18, 183-188.

"A cryogenically stabilized meV-monochromator for hard X-rays", T.S. Toellner et al., J. Synchrotron Rad. (2006) 13, 211.

"Crystal monochromator with a resolution beyond 10⁸", T.S. Toellner et al., J. Synchrotron Rad. (2001)  8, 1082.

"Monochromatization of synchrotron radiation for nuclear resonant scattering experiments", T.S. Toellner, Hyp. Interact. (2000) 125, 3.

"Inelastic nuclear resonant scattering with sub-meV energy resolution", T.S. Toellner et al., Appl. Phys. Lett. (1997)  71, 2112.

Developing Moessbauer and related spectroscopies using synchrotron radiation sources. This involves developing new measurement methodologies and state-of-the-art instrumentation to extract useful information and allow nuclear spectroscopic methods to be applied over a wide range of scientific disciplines such as materials research, geophysics, and life sciences.  State-of-the-art instrumentation development includes milli-electron-Volt and sub-milli-electron-Volt energy-bandwidth X-ray monochromators and other crystal optics to manipulate synchrotron radiation for the purpose of carrying out nuclear spectroscopies.

Ph.D. Physics, Northwestern University - Evanston, IL 1996, thesis title:  High-Resolution X-ray Probes Using Nuclear Resonant Scattering

B.S. Mathematics, University of Wisconsin - Madison, WI 1988

B.S. Physics, University of Wisconsin - Madison, WI 1988