Christian Schwarz

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The spallation of 56Fe in collisions with hydrogen at 1A GeV has been studied in inverse kinematics with the large-aperture setup SPALADIN at GSI. Coincidences of residues with low-center-of-mass kinetic energy light particles and fragments have been measured allowing the decomposition of the total reaction cross section into the different possible(More)
Multifragment decays of central collisions in "4Kr + '97Au at E/A = 35, 55, and 70 MeV are studied. The dependence of the extracted emission time on the velocity of the fragment pair is investigated. More energetic pairs manifest a stronger Coulomb interaction, indicating emission from a source of smaller spatial-temporal extent than less energetic pairs.(More)
Thermal noise arising from mechanical dissipation in oxide coatings is a major limitation to many precision measurement systems, including optical frequency standards, high-resolution optical spectroscopy and interferometric gravity wave detectors. Presented here are measurements of dissipation as a function of temperature between 7 K and 290 K in(More)
Active, widely tunable optical materials have enabled rapid advances in photonics and optoelectronics, especially in the emerging field of meta-devices. Here, we demonstrate that spatially selective defect engineering on the nanometer scale can transform phase-transition materials into optical metasurfaces. Using ion irradiation through nanometer-scale(More)
1 We report on temperature measurements of nuclear systems formed in the Au+Au collisions at incident energies of 50, 100, 150, 200 and 1000 A MeV.The target spectator matter was studied at the highest energy and the interacting zone (participants) at the lower ones.The temperature deduced from the isotope ratios was compared with the one deduced via the(More)
Current interferometric gravitational wave detectors (IGWDs) are operated at room temperature with test masses made from fused silica. Fused silica shows very low absorption at the laser wavelength of 1064nm. It is also well suited to realize low thermal noise floors in the detector signal band since it offers low mechanical loss, i. e. high quality factors(More)
W. F. J. Müller1 for the ALADIN collaboration: R. Bassini,2 M. Begemann-Blaich,1 Th. Blaich,3 H. Emling,1 A. Ferrero,2 S. Fritz,1 C. Groß,1 G. Immé,4 I. Iori,2 U. Kleinevoß,1 G. J. Kunde,1† W. D. Kunze,5 V. Lindenstruth,1‡ U. Lynen,1 M. Mahi,1 A. Moroni,2 T. Möhlenkamp,6 B. Ocker,1 T. Odeh,1 J. Pochodzalla,1§ G. Raciti,4 Th. Rubehn,1‡ H. Sann,1 M.(More)
We report on new measurements of breakup temperatures for target spectators from Au + Au reactions at 1000 MeV per nucleon. The temperatures rise with decreasing impact parameter from 4 MeV for peripheral to about 10 MeV for the most central collisions, in good agreement with previous results for projectile spectators at 600 MeV per nucleon. The measured(More)
Baryon-to-meson Transition Distribution Amplitudes (TDAs) encoding valuable new information on hadron structure appear as building blocks in the collinear factorized description for several types of hard exclusive reactions. In this paper, we address the possibility of accessing nucleon-to-pion (πN) TDAs from p̄p → eeπ reaction with the future P̄ANDA(More)