Development of a beam of very slow polarized muons |
| |
Authors: | Morenzoni E Birke M Hofer A Kottmann F Litterst J Matthias B Meyberg M Niedermayer Ch Prokscha Th Schatz G Wutzke Th |
| |
Institution: | (1) Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;(2) Physik Institut, Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany;(3) Fakultät für Physik, Universität Konstanz, D-78434 Konstanz, Germany;(4) Institut für Metallphysik und Nukleare Festkörperphysik, Technische Universität Braunschweig, D-38106 Braunschweig, Germany;(5) Institut für Teilchenphysik, ETH Zürich, CH-5232 Villigen PSI, Switzerland |
| |
Abstract: | During the last few decades, a variety of methods has been developed which makes use of polarized positive muons as a microscopic probe of the magnetic properties of condensed matter (muon spin rotation, relaxation, resonance,SR). Until now, available beams for SR studies have delivered 100% polarized muons with energies in the MeV range, resulting in a deep penetration of the muons into the sample material under investigation. This presently limits the applications of theSR technique to the study of the bulk characteristics of matter. To be able to control the implantation depth, a very low energy beam of polarized muons is being developed at the Paul Scherrer Institute. Very slow polarized muons (kinetic energy 10 eV, polarization 90%) are obtained from the moderation of a high energy muon beam in a thin film of an appropriate condensed gas. These muons can be used as a source for a beam of tunable energy between a few tens of eV and some tens of keV. Implantation depths in the range of few to a few hundreds of nanometers can thus be achieved by varying the energy. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|