Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 7: Superconductivity: Cryodetectors
TT 7.5: Vortrag
Montag, 31. März 2014, 10:30–10:45, HSZ 03
Application of Calorimetric Low Temperature Detectors (CLTD’s) for Precise Stopping Power Measurements of Heavy Ions in Matter — •Artur Echler1,2,3, Peter Egelhof2,3, Patrick Grabitz2,3, Heikki Kettunen4, Saskia Kraft-Bermuth1, Mikko Laitinen4, Katrin Müller1, Mikko Rossi4, Wladyslaw Trzaska4, and Ari Virtanen4 — 1Justus-Liebig-Universität, Gießen — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt — 3Johannes Gutenberg Universität, Mainz — 4University of Jyväskylä
Precise data on stopping powers (i.e. specific energy loss dE/dx) of heavy ions in matter are needed in many fields of basic and applied science, and for our understanding of the interaction of energetic ions with matter. As the available datasets are still scarce, in particular for heavy projectiles at energies below the Bragg-peak, and discrepancies between measured and theoretical values are often significant, CLTD’s have been recently applied in combination with a time-of-flight detector to perform transition-type energy loss measurements at the accelerator facility of the University of Jyväskylä. As compared to conventional ionization detectors, CLTD’s provide substantially better energy resolution and linearity (with the absence of any pulse height defect) for heavy ion detection, which leads to a higher sensitivity and accuracy for dE/dx measurements using the E-TOF method, and allows to extend the accessible energy range towards lower energies. The new experimental technique was used to determine precise stopping power data for 0.05 - 1 MeV/u 131Xe ions in Carbon, Nickel and Gold.