Auflistung nach Schlagwort "Resonance"

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  • 40K-87Rb Feshbach resonances: Modeling the interatomic potential 
    Klempt, Carsten; Henninger, T.; Topic, O.; Will, J.; Ertmer, Wolfgang; Tiemann, E.; Arlt, Jan J. (College Park : American Physical Society, 2007)
    We have observed 28 heteronuclear Feshbach resonances in ten spin combinations of the hyperfine ground states of a 40K−87Rb mixture. The measurements were performed by observing the loss rates from an atomic mixture at ...
  • Absorption and resonance Raman characteristics of β-carotene in water-ethanol mixtures, emulsion and hydrogel 
    Meinhardt-Wollweber, Merve; Suhr, Christian; Kniggendorf, Ann-Kathrin; Roth, Bernhard (College Park, MD : American Institute of Physics, 2018)
    Absorption or resonance Raman scattering are often used to identify and even quantify carotenoids in situ. We studied the absorption spectra, the Raman spectra and their resonance behavior of β-carotene in different molecular ...
  • Access to metastable complex ion conductors via mechanosynthesis: Preparation, microstructure and conductivity of (Ba,Sr)LiF3 with inverse perovskite structure 
    Düvel, A.; Wegner, S.; Efimov, K.; Feldhoff, A.; Heitjans, Paul; Wilkening, Martin (Cambridge : Royal Society of Chemistry, 2011)
    Highly metastable Ba1−xSrxLiF3 (0 < x ≤ xmax ≈ 0.4) with an inverse perovskite structure analogous to that of BaLiF3 was synthesized by soft mechanical treatment of BaF2 and LiF together with SrF2 at ambient temperature. ...
  • Efficient procedure for the measurement of preresonant excitation profiles in UV Raman spectroscopy 
    Höhl, Martin; Roth, Bernhard; Morgner, Uwe; Meinhardt-Wollweber, Merve (College Park, ML : American Physical Society, 2017)
    Resonance Raman spectroscopy (RRS) is a promising technique for investigating samples with low concentrations of single constituents or many different constituents. The wavelength dependent resonance enhancement (resonance ...
  • Ermüdungsversuche an großformatigen vorgespannten Betonbalken 
    Birkner, Dennis; Marx, Steffen (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)
    Zur besseren Einschätzung des Ermüdungsverhaltens realer Bauteile sind großformatige Ermüdungsversuche gegenüber Zylinderdruckversuchen geeigneter, da in ihnen Prozesse wie lokale Steifigkeitsänderungen und Spannungsumlagerungen ...
  • Evaluation of micro-damage by acoustic methods 
    Gerstein, Gregory; Briukhanov, Arkadii; Gutknecht, Florian; Volchok, Natalia; Clausmeyer, Till; Nürnberger, Florian; Tekkaya, A. Erman; Maier, Hans Jürgen (Amsterdam : Elsevier B.V., 2018)
    Several methods for the determination of integral damage in sheet metal are reviewed and investigated at the example of the ferritic steel DC04. A novel method to determine damage in cylindrical rings is proposed. Such a ...
  • Giant anisotropy of zeeman splitting of quantum confined acceptors in Si/Ge 
    Haendel, K.-M.; Winkler, R.; Denker, U.; Schmidt, O.G.; Haug, Rolf J. (College Park, MD : American Physical Society, 2006)
    Shallow acceptor levels in Si/Ge/Si quantum well heterostructures are characterized by resonant-tunneling spectroscopy in the presence of high magnetic fields. In a perpendicular magnetic field we observe a linear Zeeman ...
  • High-order harmonic generation in the presence of a resonance 
    Tudorovskaya, Maria; Lein, Manfred (College Park, MD : American Physical Society, 2011)
    We investigate high-order harmonic generation from laser-irradiated systems that support a shape resonance. From the numerical solution of the time-dependent Schrödinger equation, we calculate the harmonic spectra and the ...
  • Improved Electrochemical Performance of Modified Mesocarbon Microbeads for Lithium-Ion Batteries Studied using Solid-State Nuclear Magnetic Resonance Spectroscopy 
    Bösebeck, Katharina; Chandran, C. Vinod; Licht, Björn K.; Binnewies, Michael; Heitjans, Paul (Weinheim : Wiley-VCH Verlag, 2016)
    Lithium-intercalating materials such as graphite are of great interest, especially for application in lithium-ion batteries. In this work we present an investigation of the electrochemical performance of mesocarbon microbeads ...
  • Mode-cleaning and injection optics of the gravitational-wave detector GEO600 
    Goßler, S.; Casey, M.M.; Freise, A.; Grant, A.; Grote, H.; Heinzel, G.; Heurs, Michèle; Husman, M.E.; Kötter, K.; Leonhardt, V.; Lück, Harald; Malec, M.; Mossavi, K.; Nagano, S.; McNamara, P.W.; Plissi, M.V.; Quetschke, V.; Robertson, D.I.; Robertson, N.A.; Rüdiger, A.; Schilling, R.; Skeldon, K.D.; Strain, K.A.; Torrie, C.I.; Ward, H.; Weiland, U.; Willke, B.; Winkler, W.; Hough, J.; Danzmann, K. (College Park, MD : American Institute of Physics (AIP), 2003)
    A study to investigate the mode-cleaning and injection optics of the gravitational-wave detector GEO600 was presented. The instrument uses two high-finesse triangular ring cavities of 8 m optical wavelength each, as an ...
  • Model-based feedback control of an ultrasonic transducer for ultrasonic assisted turning using a novel digital controller 
    Ille, I.; Twiefel, J. (Amsterdam : Elsevier, 2015)
    Ultrasonic turning has time variant parameters due to temperature effects and changing load conditions during the process. This results in a change of the resonance frequency and vibration amplitude. To realize constant ...
  • Rapid generation of all-optical K 39 Bose-Einstein condensates using a low-field Feshbach resonance 
    Herbst, A.; Albers, H.; Stolzenberg, K.; Bode, S.; Schlippert, D. (Woodbury, NY : Inst., 2022)
    Ultracold potassium is an interesting candidate for quantum technology applications and fundamental research as it allows controlling intra-atomic interactions via low-field magnetic Feshbach resonances. However, the ...
  • Resonant optical excitation of longitudinal-optical phonons and intermixing in InAsAlAs single quantum dots 
    Sarkar, D.; Van Der Meulen, H.P.; Calleja, J.M.; Meyer, J.M.; Haug, Rolf J.; Pierz, Klaus (College Park, MD : American Institute of Physics, 2008)
    Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is ...
  • Time-domain high-finesse atom interferometry 
    Hinderthür, H.; Ruschewitz, F.; Lohe, H.-J.; Lechte, S.; Sengstock, K.; Ertmer, Wolfgang (American Physical Society, 1999)
    We report on experiments of multiple-beam atom interferometry in the time domain. Laser-cooled and trapped atoms interact with atomic "multiple beam splitters" realized by time sequences of resonant laser pulses. The output ...
  • Tunable dual-species Bose-Einstein condensates of 39K and 87Rb 
    Wacker, L.; Jørgensen, N.B.; Birkmose, D.; Horchani, R.; Ertmer, Wolfgang; Klempt, Carsten; Winter, N.; Sherson, J.; Arlt, Jan J. (College Park : American Physical Society, 2015)
    We present the production of dual-species Bose-Einstein condensates (BECs) of 39K and 87Rb. Preparation of both species in the |F=1,mF=−1⟩ state enabled us to exploit a total of three Feshbach resonances, which allows for ...