30 citations · 42 across the 3 of their papers we have counts for
Showing physics.atom-phShow all
3 papers · 1 filter
physics.atom-ph2015★ 30 cited
Observation of positronium annihilation in the 2S state: towards a new measurement of the 1S-2S transition frequency
D. A. Cooke, P. Crivelli, J. Alnis +8
We report the first observation of the annihilation of positronium from the 2S state. Positronium (Ps) is excited with a two-photon transition from the 1S to the 2S state where its…
physics.atom-ph2011★ 12 cited
First observation of two hyperfine transitions in antiprotonic He-3
S. Friedreich, D. Barna, F. Caspers +11
We report on the first experimental results for microwave spectroscopy of the hyperfine structure of antiprotonic He-3. Due to the helium nuclear spin, antiprotonic He-3 has a more…
physics.atom-ph2009
Collision Induced Relaxations within the Antiprotonic Helium Hyperfine Structure
T. Pask, D. Barna, A. Dax +10
We report the first measurements of the inelastic spin exchange collision rate between the Hyperfine (HF) levels of antiprotonic helium. We measure the time dependent evolution of…