8 papers
Pressure dependence of the Mg transition in superfluid He
I. Baumann, A. Breidenassel, C. Zühlke +4
The pressure shifts of the transition of magnesium atoms immersed in superfluid helium have been measured at K between saturated vapou…
A superfluid hydrodynamic model for the enhanced moments of inertia of molecules in liquid 4He
C. Callegari, A. Conjusteau, I. Reinhard +3
We present a superfluid hydrodynamic model for the increase in moment of inertia, , of molecules rotating in liquid He. The static inhomogeneous He density around each mole…
Measurement of the 1s-2s energy interval in muonium
V. Meyer, S. N. Bagayev, P. E. G. Baird +26
The 1s-2s interval has been measured in the muonium ({}) atom by Doppler-free two-photon laser spectroscopy. The frequency separation of the states was determined to be 2 4…
Single and Double Resonance Microwave Spectroscopy in Superfluid He Clusters
I. Reinhard, C. Callegari, A. Conjusteau +2
Purely rotational transitions of a molecule, such as HCCCN, embedded in large He clusters have been detected for the first time. The saturation behavior shows that, in contrast…
New Bounds from Searching for Muonium to Antimuonium Conversion
L. Willmann, P. V. Schmidt, H. P. Wirtz +26
A new upper limit for the probability of spontaneous muonium to antimuonium conversion was established at (90%C.L.) in 0.1~T magnetic f…
Improved upper limit on Muonium to Antimuonium Conversion
R. Abela, J. Bagaturia, W. Bertl +29
A new experiment has been set up at the Paul Scherrer Institut to search for muonium to antimuonium conversion. No event was found to fulfil the requested signature which consists…