21 citations · 53 across the 6 of their papers we have counts for
6 papers
Dynamic nuclear polarization and ESR hole burning in As doped silicon
J. Jarvinen, D. Zvezdov, J. Ahokas +6
We present an experimental study of the Dynamic Nuclear Polarization (DNP) of \si{} nuclei in silicon crystals of natural abundance doped with As in the temperature range 0.1-1 K a…
Searching for Magnetostatic Modes in Spin-Polarized Atomic Hydrogen
Lauri Lehtonen, Otto Vainio, Janne Ahokas +4
We consider a possibility of the magnetostatic type spin waves driven by a long-range magnetic dipole interactions, to account for the peaks in the ESR spectra observed in our prev…
Spin Waves in Quantum Gases --- The Quality Factor of the Identical Spin Rotation Effect
L. Lehtonen, O. Vainio, J. Ahokas +6
Our recent experimental work on electron spin waves in atomic hydrogen gas has prompted a revisit of the theory of the Identical Spin Rotation Effect (ISRE). A key characteristic d…
Bose-Einstein condensation of magnons in atomic hydrogen gas
O. Vainio, J. Ahokas, J. Järvinen +8
We report on experimental observation of BEC-like behaviour of quantized electron spin waves (magnons) in a dense gas of spin polarized atomic hydrogen. The magnons are trapped and…
Thermal compression of atomic hydrogen on helium surface
J. Järvinen, J. Ahokas, S. Vasiliev
We describe experiments with spin-polarized atomic hydrogen gas adsorbed on liquid He surface. The surface gas density is increased locally by thermal compression up to $5.5\…
Cold Collision Frequency Shift in Two-Dimensional Atomic Hydrogen
J. Ahokas, J. Jarvinen, S. Vasiliev
We report a measurement of the cold collision frequency shift in atomic hydrogen gas adsorbed on the surface of superfluid 4He at T<=90 mK. Using two-photon electron and nuclear ma…