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- [21] Coulomb explosion imaging of small polyatomic molecules with ultrashort x-ray pulsesPHYSICAL REVIEW RESEARCH, 2022, 4 (01):Li, X.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA论文数: 引用数: h-index:机构:Schoeffler, M. S.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAAnders, N.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USABaumann, Th M.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAEckart, S.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAErk, B.论文数: 0 引用数: 0 h-index: 0机构: DESY, Notkestr 85, D-22607 Hamburg, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USADe Fanis, A.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAFehre, K.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USADoerner, R.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAFoucar, L.论文数: 0 引用数: 0 h-index: 0机构: Max Planck Inst Med Res, D-69120 Heidelberg, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAGrundmann, S.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAGrychtol, P.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAHartung, A.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAHofmann, M.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAIlchen, M.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Univ Kassel, Inst Phys, Heinrich Plett Str 40, D-34132 Kassel, Germany Univ Kassel, CINSaT, Heinrich Plett Str 40, D-34132 Kassel, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAJanke, Ch论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAKastirke, G.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAKircher, M.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAKubicek, K.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAKunitski, M.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAMazza, T.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAMeister, S.论文数: 0 引用数: 0 h-index: 0机构: Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAMelzer, N.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAMontano, J.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA论文数: 引用数: h-index:机构:Nalin, G.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAOvcharenko, Y.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAPassow, Ch论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAPier, A.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USARennhack, N.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USARist, J.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USARivas, D. E.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USASchlichting, I论文数: 0 引用数: 0 h-index: 0机构: Max Planck Inst Med Res, D-69120 Heidelberg, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USASchmidt, L. Ph H.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USASchmidt, Ph论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Univ Kassel, Inst Phys, Heinrich Plett Str 40, D-34132 Kassel, Germany Univ Kassel, CINSaT, Heinrich Plett Str 40, D-34132 Kassel, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USASiebert, J.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAStrenger, N.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USATrabert, D.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USATrinter, F.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany DESY, Notkestr 85, D-22607 Hamburg, Germany Fritz Haber Inst Max Planck Gesell, Mol Phys, Faradayweg 4-6, D-14195 Berlin, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAVela-Perez, I论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAWagner, R.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAWalter, P.论文数: 0 引用数: 0 h-index: 0机构: SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAWeller, M.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAZiolkowski, P.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USACzasch, A.论文数: 0 引用数: 0 h-index: 0机构: Goethe Univ, Inst Kernphys, Max von Laue Str 1, D-60438 Frankfurt, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA论文数: 引用数: h-index:机构:Meyer, M.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAJahnke, T.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USABoll, R.论文数: 0 引用数: 0 h-index: 0机构: European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA
- [22] Coulomb explosion imaging:: the CH+3 and H3O+ moleculesJOURNAL OF MOLECULAR STRUCTURE, 2005, 742 (1-3) : 43 - 48Yurchenko, SN论文数: 0 引用数: 0 h-index: 0机构: Berg Univ Wuppertal, D-42097 Wuppertal, GermanyBunker, PR论文数: 0 引用数: 0 h-index: 0机构: Berg Univ Wuppertal, D-42097 Wuppertal, GermanyJensen, P论文数: 0 引用数: 0 h-index: 0机构: Berg Univ Wuppertal, D-42097 Wuppertal, Germany Berg Univ Wuppertal, D-42097 Wuppertal, Germany
- [23] Making Sense of Coulomb Explosion ImagingJOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2019, 10 (06): : 1361 - 1367Luzon, Itamar论文数: 0 引用数: 0 h-index: 0机构: Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, IsraelLivshits, Ester论文数: 0 引用数: 0 h-index: 0机构: Hebrew Univ Jerusalem, Fritz Haber Ctr Mol Dynam, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, IsraelGope, Krishnendu论文数: 0 引用数: 0 h-index: 0机构: Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, IsraelBaer, Roi论文数: 0 引用数: 0 h-index: 0机构: Hebrew Univ Jerusalem, Fritz Haber Ctr Mol Dynam, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, IsraelStrasser, Daniel论文数: 0 引用数: 0 h-index: 0机构: Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel
- [24] Coulomb explosion imaging of bromobenzene and bromophenol molecules following Br K-shell ionizationJOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2010, 43 (18)Iwayama, H.论文数: 0 引用数: 0 h-index: 0机构: Kyoto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ, Dept Phys, Kyoto 6068502, Japan论文数: 引用数: h-index:机构:Murakami, H.论文数: 0 引用数: 0 h-index: 0机构: Kyoto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ, Dept Phys, Kyoto 6068502, JapanOhmasa, Y.论文数: 0 引用数: 0 h-index: 0机构: Kyoto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ, Dept Phys, Kyoto 6068502, JapanYao, M.论文数: 0 引用数: 0 h-index: 0机构: Kyoto Univ, Dept Phys, Kyoto 6068502, Japan Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
- [25] Approaches for constraining uncertainty and degeneracy in geometry reconstruction of molecules from Coulomb Explosion Imaging data31ST INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC XXXI), 2020, 1412Tian, K.论文数: 0 引用数: 0 h-index: 0机构: Univ Waterloo, Waterloo, ON N2L 3G1, Canada Univ Waterloo, Waterloo, ON N2L 3G1, Canada论文数: 引用数: h-index:机构:Singh, M. D.论文数: 0 引用数: 0 h-index: 0机构: Univ Waterloo, Waterloo, ON N2L 3G1, Canada Univ Waterloo, Waterloo, ON N2L 3G1, CanadaSanderson, J.论文数: 0 引用数: 0 h-index: 0机构: Univ Waterloo, Waterloo, ON N2L 3G1, Canada Univ Waterloo, Waterloo, ON N2L 3G1, Canada
- [26] COULOMB EXPLOSION OF SIMPLE MOLECULES IN INTENSE LASER FIELDSCONTEMPORARY PHYSICS, 1994, 35 (04) : 243 - 255CODLING, K论文数: 0 引用数: 0 h-index: 0机构: J. J. Thomson Physical Laboratory, University of Reading, Reading, RG6 2AF, WhitenightsFRASINSKI, LJ论文数: 0 引用数: 0 h-index: 0机构: J. J. Thomson Physical Laboratory, University of Reading, Reading, RG6 2AF, Whitenights
- [27] Coulomb explosion of simple molecules in intense laser fieldsContemporary Physics, 1994, 35Codling, K.论文数: 0 引用数: 0 h-index: 0Frasinski, L. J.论文数: 0 引用数: 0 h-index: 0
- [28] Bond rearrangement during Coulomb explosion of water moleculesPHYSICAL REVIEW A, 2019, 99 (01)Leonard, M.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USASayler, A. M.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USACarnes, K. D.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAKaufman, Emily M.论文数: 0 引用数: 0 h-index: 0机构: Augustana Univ, Dept Phys, Sioux Falls, SD 57197 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAWells, E.论文数: 0 引用数: 0 h-index: 0机构: Augustana Univ, Dept Phys, Sioux Falls, SD 57197 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USACabrera-Trujillo, R.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Apartado Postal 48-3, Cuernavaca 62251, Morelos, Mexico Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USAEsry, B. D.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USABen-Itzhak, I.论文数: 0 引用数: 0 h-index: 0机构: Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA
- [29] On laser Coulomb explosion imaging of proton motionCHEMICAL PHYSICS LETTERS, 2001, 336 (5-6) : 518 - 522Bandrauk, AD论文数: 0 引用数: 0 h-index: 0机构: Univ Sherbrooke, Fac Sci, Chim Theor Lab, Sherbrooke, PQ J1K 2R1, Canada Univ Sherbrooke, Fac Sci, Chim Theor Lab, Sherbrooke, PQ J1K 2R1, CanadaChelkowski, S论文数: 0 引用数: 0 h-index: 0机构: Univ Sherbrooke, Fac Sci, Chim Theor Lab, Sherbrooke, PQ J1K 2R1, Canada Univ Sherbrooke, Fac Sci, Chim Theor Lab, Sherbrooke, PQ J1K 2R1, Canada
- [30] Multiparticle Cumulant Mapping for Coulomb Explosion ImagingPHYSICAL REVIEW LETTERS, 2023, 130 (09)Cheng, Chuan论文数: 0 引用数: 0 h-index: 0机构: SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USAFrasinski, Leszek J.论文数: 0 引用数: 0 h-index: 0机构: Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USAMogol, Gonenc论文数: 0 引用数: 0 h-index: 0机构: SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USAAllum, Felix论文数: 0 引用数: 0 h-index: 0机构: Univ Oxford, Dept Chem, Chem Res Lab, Oxford OX1, England SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USAHoward, Andrew J.论文数: 0 引用数: 0 h-index: 0机构: SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA论文数: 引用数: h-index:机构:Bucksbaum, Philip H.论文数: 0 引用数: 0 h-index: 0机构: SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USABrouard, Mark论文数: 0 引用数: 0 h-index: 0机构: Univ Oxford, Dept Chem, Chem Res Lab, Oxford OX1, England SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USAForbes, Ruaridh论文数: 0 引用数: 0 h-index: 0机构: SLAC Natl Accelerator Lab, Stanford PULSE Inst, Menlo Pk, CA 94025 USA SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USAWeinacht, Thomas论文数: 0 引用数: 0 h-index: 0机构: SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA