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Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 6: Superconductivity: Cryodetectors

TT 6.4: Vortrag

Montag, 16. März 2015, 10:15–10:30, H 2053

Feasibility Study for the Determination of Z-distributions of fission fragments with Calorimetric Low Temperature Detectors — •Patrick Grabitz1,2, Peter Egelhof1,2, Saskia Kraft-Bermuth3, Pascal Scholz3, Artur Echler3, Shawn Bishop4, Jose Gomez4, Manfred Mutterer1, and Victor Andrianov1,31GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 2Universät Mainz, Germany — 3Universität Gießen, Germany — 4Technische Universität München

Compared to conventional ionization detectors calorimetric low temperature detectors (CLTD’s) provide, due to their detection principle, substantial advantages in detector performance, such as energy resolution, linearity and the absence of any pulse height defect. One potential application of such detectors is the determination of nuclear charge distributions of fission fragments from thermal neutron induced fission at the LOHENGRIN mass separator (ILL, Grenoble) by using the absorber method. After passing the mass separator, fission fragments have the same mass and the same kinetic energy, but different nuclear charges. For the separation of the nuclear charges one can exploit their nuclear charge dependent energy loss after passing through an absorber foil. This separation requires a high energy resolution detector system as well as degrader foils, optimized with respect to thickness, homogeneity, etc. A test experiment performed at the tandem accelerator at Munich (MLL, LMU) with stable 109Ag and 127I beams with different kinetic energies has demonstrated a good Z-selectivity, and thus the feasibility of the experimental method.

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