研究者詳細 - 伏谷　瑞穂

論文 - 伏谷　瑞穂

分割表示 99 件中 61 - 80 件目／全件表示 >>

Enhanced Nonlinear Double Excitation of He in Intense Extreme Ultraviolet Laser Fields 査読有り

Hishikawa A., Fushitani M., Hikosaka Y., Matsuda A., Liu C. -N., Morishita T., Shigemasa E., Nagasono M., Tono K., Togashi T., Ohashi H., Kimura H., Senba Y., Yabashi M., Ishikawa T.

PHYSICAL REVIEW LETTERS 107 巻 ( 24 ) 頁： 243003 2011年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review Letters

Nonlinear, three-photon double excitation of He in intense extreme ultraviolet free-electron laser fields (∼24.1eV, ∼5TW/cm,sup>2) is presented. Resonances to the doubly excited states converging to the He + N=3 level are revealed by the shot-by-shot photoelectron spectroscopy and identified by theoretical calculations based on the time-dependent Schrödinger equation for the two-electron atom under a laser field. It is shown that the three-photon double excitation is enhanced by intermediate Rydberg states below the first ionization threshold, giving a greater contribution to the photoionization yields than the two-photon process by more than 1 order of magnitude. © 2011 American Physical Society.

DOI： 10.1103/PhysRevLett.107.243003

Web of Science

Scopus

A magnetic-bottle multi-electron-ion coincidence spectrometer 査読有り

Matsuda Akitaka, Fushitani Mizuho, Tseng Chien-Ming, Hikosaka Yasumasa, Eland John H. D., Hishikawa Akiyoshi

REVIEW OF SCIENTIFIC INSTRUMENTS 82 巻 ( 10 ) 頁： 103105 2011年10月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Review of Scientific Instruments

A novel multi-electron-ion coincidence spectrometer developed on the basis of a 1.5 m-long magnetic-bottle electron spectrometer is presented. Electrons are guided by an inhomogeneous magnetic field to a detector at the end of the flight tube, while a set of optics is used to extract counterpart ions to the same detector, by a pulsed inhomogeneous electric field. This setup allows ion detection with high mass resolution, without impairing the high collection efficiency for electrons. The performance of the coincidence spectrometer was tested with double ionization of carbon disulfide, CS2 → CS 22+e-e-, in ultrashort intense laser fields (2.8 × 1013W/cm2, 280 fs, 1030 nm) to clarify the electron correlation below the rescattering threshold. © 2011 American Institute of Physics.

DOI： 10.1063/1.3648133

Web of Science

Scopus

Time-resolved EUV photoelectron spectroscopy of dissociating I-2 by laser harmonics at 80 nm 査読有り

Fushitani Mizuho, Matsuda Akitaka, Hishikawa Akiyoshi

OPTICS EXPRESS 19 巻 ( 10 ) 頁： 9600 - 9606 2011年5月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Optics Express

Generation of single-order laser harmonics in extreme ultraviolet (EUV) and the application to the time-resolved photoelectron spectroscopy of I 2 are demonstrated. The EUV pulses at 80 nm were generated from Kr as the 5th order harmonics of intense 400 nm laser pulses and then separated from other harmonic orders by a thin indium foil. The pump-probe photoelectron spectroscopy of I2 in the B 3Π(0u+) and B" 1Π(1u) states excited by visible laser pulses at 490 nm showed a rapid increase in the yield of atomic iodine (∼400 fs), reflecting the dissociation dynamics evolving simultaneously in the two excited states. © 2011 Optical Society of America.

DOI： 10.1364/OE.19.009600

Web of Science

Scopus

Visualizing hydrogen atoms migrating in acetylene dication by time-resolved three-body and four-body Coulomb explosion imaging 査読有り

Matsuda Akitaka, Fushitani Mizuho, Takahashi Eiji J., Hishikawa Akiyoshi

PHYSICAL CHEMISTRY CHEMICAL PHYSICS 13 巻 ( 19 ) 頁： 8697 - 8704 2011年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Chemistry Chemical Physics

The visualization of ultrafast isomerization of deuterated acetylene dication (C2D22+) is demonstrated by time-resolved Coulomb explosion imaging with sub-10 fs intense laser pulses (9 fs, 0.13 PW cm-2, 800 nm). The Coulomb explosion imaging monitoring the three-body explosion process, C2D23+ → D+ + C+ + CD+, as a function of the delay between the pump and probe pulses revealed that the migration of a deuterium atom proceeds in a recurrent manner; One of the deuterium atoms first shifts from one carbon site to the other in a short timescale (∼90 fs), and then migrates back to the original carbon site by 280 fs, in competition with the molecular dissociation. Correlated motion of the two deuterium atoms associated with the hydrogen migration and structural deformation to non-planar geometry are identified by the time-resolved four-body Coulomb explosion imaging, C 2D24+ → D+ + C+ + C+ + D+. © 2011 the Owner Societies.

DOI： 10.1039/c0cp02333g

Web of Science

Scopus

Infrared spectroscopy of rovibrational transitions of methyl radicals (CH3, CD3) in solid parahydrogen 査読有り

Hoshina Hiromichi, Fushitani Mizuho, Momose Takamasa

JOURNAL OF MOLECULAR SPECTROSCOPY 268 巻 ( 1-2 ) 頁： 164 - 172 2011年

Multiphoton Double Ionization of Ar in Intense Extreme Ultraviolet Laser Fields Studied by Shot-by-Shot Photoelectron Spectroscopy 査読有り

Hikosaka Y., Fushitani M., Matsuda A., Tseng C-M., Hishikawa A., Shigemasa E., Nagasono M., Tono K., Togashi T., Ohashi H., Kimura H., Senba Y., Yabashi M., Ishikawa T.

PHYSICAL REVIEW LETTERS 105 巻 ( 13 ) 2010年9月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Physical Review Letters

Photoelectron spectroscopy has been performed to study the multiphoton double ionization of Ar in an intense extreme ultraviolet laser field (hν∼21eV, ∼5TW/cm2), by using a free electron laser (FEL). Three distinct peaks identified in the observed photoelectron spectra clearly show that the double ionization proceeds sequentially via the formation of Ar +: Ar+hν→Ar++e- and Ar ++2hν→Ar2++e-. Shot-by-shot recording of the photoelectron spectra allows simultaneous monitoring of FEL spectrum and the multiphoton process for each FEL pulse, revealing that the two-photon ionization from Ar+ is significantly enhanced by intermediate resonances in Ar+. © 2010 The American Physical Society.

DOI： 10.1103/PhysRevLett.105.133001

Web of Science

Scopus

Phase Sensitive Control of Vibronic Guest-Host Interaction: Br-2 in Ar Matrix 査読有り

Ibrahim Heide, Hejjas Monika, Fushitani Mizuho, Schwentner Nikolaus

JOURNAL OF PHYSICAL CHEMISTRY A 113 巻 ( 26 ) 頁： 7439 - 7450 2009年7月

Multiple Explosion Pathways of the Deuterated Benzene Trication in 9-fs Intense Laser Fields 査読有り

Matsuda Akitaka, Fushitani Mizuho, Thomas Richard A., Zhaunerchyk Vitali, Hishikawa Akiyoshi

JOURNAL OF PHYSICAL CHEMISTRY A 113 巻 ( 11 ) 頁： 2254 - 2260 2009年3月

Electron-ion coincidence momentum imaging of molecular dissociative ionization in intense laser fields: Application to CS2 査読有り

Matsuda Akitaka, Fushitani Mizuho, Hishikawa Akiyoshi

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA 169 巻 ( 2-3 ) 頁： 97 - 101 2009年2月

Time-resolved reaction imaging by intense few-cycle laser pulses and laser high-order harmonics 査読有り

M. Fushitani, A. Matsuda, E. J. Takahashi, A. Hishikawa

Journal of Physics: Conference Series 185 巻 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：Institute of Physics Publishing

We discuss two novel approaches to visualize ultrafast dynamics of polyatomic molecules using few-cycle intense laser pulses and the high-order harmonics in the soft X-ray region, respectively. First, we present the real-time Coulomb explosion imaging of ultrafast isomerization of C 2D2 2+ by using intense few-cycle laser pulses (&lt
10 fs, ∼1 PW/cm2, ∼800 nm) to show that the hydrogen migration proceeds recurrently in competition with the molecular dissociation. Secondly, we present a new experimental setup for the real-time inner-core excitation imaging, focusing on the generation and separation of the light source using the 59th order harmonic pulses (∼91 eV) and their characteristics. © 2009 IOP Publishing Ltd.

DOI： 10.1088/1742-6596/185/1/012009

Scopus

Femtosecond pump-probe 2D optical Kerr effect spectroscopy of molecular hydrogen crystals 査読有り

Koenigsmann Falk, Fushitani Mizuho, Owschimikow Nina, Anderson David T., Schwentner Nikolaus

CHEMICAL PHYSICS LETTERS 458 巻 ( 4-6 ) 頁： 303 - 307 2008年6月

Control of chromophore-to-bath coupling by interferometry: Cl-2 vibrational wave packets in solid Ar 査読有り

Fushitani M., Bargheer M., Guehr M., Ibrahim H., Schwentner N.

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 41 巻 ( 7 ) 2008年4月

Nuclear spin conversion of methane in solid parahydrogen 査読有り

Miyamoto Yuki, Fushitani Mizuho, Ando Daisuke, Momose Takamasa

JOURNAL OF CHEMICAL PHYSICS 128 巻 ( 11 ) 2008年3月

Acetylene-vinylidene isomerization in ultrashort intense laser fields studied by triple ion-coincidence momentum imaging 査読有り

Hishikawa Akiyoshi, Matsuda Akitaka, Takahashi Eiji J., Fushitani Mizuho

JOURNAL OF CHEMICAL PHYSICS 128 巻 ( 8 ) 2008年2月

Visualizing recurrently migrating hydrogen in acetylene dication by intense ultrashort laser pulses 査読有り

Hishikawa Akiyoshi, Matsuda Akitaka, Fushitani Mizuho, Takahashi Eiji J.

PHYSICAL REVIEW LETTERS 99 巻 ( 25 ) 2007年12月

In situ photolysis of CD3I in solid orthodeuterium 査読有り

Fushitani Mizuho, Miyamoto Yuki, Hoshina Hiromichi, Momose Takamasa

JOURNAL OF PHYSICAL CHEMISTRY A 111 巻 ( 49 ) 頁： 12629 - 12634 2007年12月

Coherent phonons in the zone boundary region of solid Ar doped with Cl2 査読有り

Mizuho Fushitani, Nikolaus Schwentner, Maike Schroeder, Oliver Kuehn

ULTRAFAST PHENOMENA XV 88 巻頁： 618 - + 2007年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：SPRINGER-VERLAG BERLIN

We report on coherent zone-boundary phonons of solid Ar doped with Cl-2 in pump-probe spectra. Comparison with molecular dynamic simulation shows that specific motions of Ar atoms in the (100) plane are responsible for the observed oscillations.

Web of Science

Visualizing recurrently migrating hydrogen by few-cycle intense laser pulses 査読有り

Akiyoshi Hishikawa, Akitaka Matsudal, Mizuho Fushitani, Eiji J. Takahashi

XXV INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS 88 巻 2007年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IOP PUBLISHING LTD

Ultrafast hydrogen migration in deuterated acetylene dication (C(2)D(2)(2+)) is studied by the pump-probe Coulomb explosion imaging with few-cycle intense laser pulses (9 fs, 0.13 PW/cm(2), 800 nm). The temporal evolution of the momenta of the fragment ions produced by the three-body explosion, C(2)D(2)(3+) -> D(+) + C(+) + CD(+), shows that the migration proceeds in a recurrent manner: The deuterium atom first shifts from one carbon site to the other in a short time scale (similar to 90 fs), and then migrates back to the original carbon site by 280 fs, in competition with the molecular dissociation.

DOI： 10.1088/1742-6596/88/1/012056

Web of Science

Coherence and control of molecular dynamics in rare gas matrices

Bargheer Matias, Borowski Alexander, Cohen Arik, Fushitani Mizuho, Gerber R. Benny, Guehr Markus, Hamm Peter, Ibrahim Heide, Kiljunen Toni, Korolkov Mikhail V., Kuehn Oliver, Manz Joern, Schmidt Burkhard, Schroeder Maike, Schwentner Nikolaus

ANALYSIS AND CONTROL OF ULTRAFAST PHOTOINDUCED REACTIONS 87 巻頁： 257 - 385 2007年

Coherent phonons in the zone boundary region of solid Ar doped with Cl2

Fushitani Mizuho, Schwentner Nikolaus, Schroeder Maike, Kuehn Oliver

ULTRAFAST PHENOMENA XV 88 巻頁： 618 - + 2007年

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