Studies of resonant laser ionization of yttrium atoms in helium
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Minimum detection limits and applications of proton and helium induced X-ray emission using transition-edge sensor array
Käyhkö, Marko; Palosaari, M. R. J.; Laitinen, Mikko; Arstila, Kai; Maasilta, Ilari; Fowler, J. W.; Doriese, W. B.; Ullom, J. N.; Sajavaara, Timo (Elsevier B.V., 2017)We have determined minimum detection limits, MDLs, for elements 14 ≤ Z ≤ 86 using a transition-edge sensor array, TES array, and as a comparison using an Amptek X-123SDD silicon drift detector, SDD. This was done using ... -
Imaging Bacterial Colonies and Phage-Bacterium Interaction at Sub-Nanometer Resolution Using Helium-Ion Microscopy
Leppänen, Miika; Sundberg, Lotta-Riina; Laanto, Elina; De Freitas Almeida, Gabriel; Papponen, Petri; Maasilta, Ilari (Wiley, 2017)Imaging of microbial interactions has so far been based on well‐established electron microscopy methods. This study presents a new way to study bacterial colonies and interactions between bacteria and their viruses, ... -
Observation of a superfluid component within solid helium
Lauter, Hans; Apaja, Vesa; Kalinin, I.; Kats, E.; Koza, M.; Krotscheck, E.; Lauter, V.V.; Puchkov, A.V. (American Physical Society, 2011)We demonstrate by neutron scattering that a localized superfluid component exists at high pressures within solid helium in aerogel. Its existence is deduced from the observation of two sharp phonon-roton spectra which ... -
A study of the helium-jet recoil-transport method and its application to on-line isotope separation
Äystö, Juha (1977)The helium-jet recoil-transport method and its coupling to the isotope separator on-line have been investigated. The dependence of the transport efficiency on several equipment parameters was studied both experimentally ...