National Superconducting
Cyclotron Laboratory

Ulrike Hager
Ulrike Hager
Assistant Professor
Experimental Nuclear Astrophysics
PhD, Physics, University of Jyväskylä, 2007
Joined NSCL in July 2014
Phone 517-908-7173
Office 2067
hager at

Ulrike Hager

My research focuses on measuring reaction rates important for nuclear astrophysics. These rates determine how quickly isotopes are created or destroyed at various astrophysical sites such as novae.

Most of my experiments are performed at the DRAGON facility at TRIUMF, Vancouver. DRAGON (Detector of Recoils And Gammas Of Nuclear reactions) was designed to provide a recoil separator to study radiative capture reactions, both on protons and alpha particles, using post-accelerated radioactive ion beams. The windowless target can contain either hydrogen or helium gas; since these are the most abundant elements in the universe, they are involved in many important reactions taking place in various stellar events.

There is currently an effort underway to build a similar separator at the NSCL to take advantage of the rare isotope beams far from stability that FRIB will provide. This will open up unique possibilities for determining rates of previously unmeasured reaction rates that are not accessible elsewhere.

Hager figure

Schematic view of the DRAGON recoil separator showing the locations of the gas target, the magnetic and electric dipoles, and the focal plane detectors.

Selected Publications

Direct measurement of the 16O(a,γ) 20Ne reaction at Ec.m. = 2.26 MeV and 1.69 MeV, U. Hager, L. Buchmann, B. Davids, J. Fallis, U. Greife, D. A. Hutcheon, D. Irvine, D. Ottewell, A. Rojas, S. Reeve, and C. Ruiz. Phys. Rev. C 86, 055802 (2012)

Measurement of the 17O(p,γ) 18F reaction rate at astrophysically relevant energies. U. Hager, L. Buchmann, B. Davids, J. Fallis, B. R. Fulton, N. Galinski, U. Greife, D. A. Hutcheon, D. Ottewell, A. Rojas, C. Ruiz, and K. Setoodehnia. Phys. Rev. C 85, 035803 (2012)

Direct total cross section measurement of the 16O(a,γ)20Ne reaction at Ec.m. = 2.26 MeV, U. Hager, J. R. Brown, L. Buchmann, M. Carmona-Gallardo, L. Erikson, J. Fallis, U. Greife, D. Hutcheon, D. Ottewell, C. Ruiz, S. Sjue, C. Vockenhuber Phys. Rev. C 84, 022801(R) (2011)