研究業績(下條　竜夫：1996年～2021年)

研究業績

(下條　竜夫：1996年～2012年)

N. Boudjemia, K. Jankala, T. Gejo, Y. Kohmura, M. Huttula, M. N. Piancastelli, M. Simon, M. Oura, and R. Puttner, “Experimental and theoretical study of the Kr L-shell Auger decay”
Phys. Rev. A 104, 012804 (2021)

Tatsuo Gejo, Tatsuru Nishie, Takahiro Nagayasu, Kenta Tanaka, Yoshihito Tanaka, Akinobu Niozu, Kiyonobu Nagaya, Ryosuke Yamamura, Nozomi Futamata, Taiga Suenaga, Osamu Takahashi, Tadashi Togashi, Shigeki Owada, Hikaru Fujise, Adriano Verna, Makina Yabashi and M Oura,
“Dissociation and ionization dynamics of CF3I and CH3I molecules via pump-and-probe experiments using soft X-ray free-electron laser”
Journal of Physics B: Atomic, Molecular and Optical Physics 54 144004 (2021)

Adriano Verna, Giovanni Stefani, Francesco Offi, Tatsuo Gejo, Yoshihito Tanaka, Kenta Tanaka, Tatsuru Nishie, Kiyonobu Nagaya, Akinobu Niozu, Ryosuke Yamamura, Taiga Suenaga, Osamu Takahashi, Hikaru Fujise, Tadashi Togashi, Makina Yabashi and Masaki Oura,
“Photoemission from the gas phase using soft x-ray fs pulses: an investigation of the space-charge effects”
New J. Phys. 22 123029 (2020)

N. Boudjemia, K. Jankala, R. Puttner, T. Gejo, L. Journel, Y. Kohmura, M. Huttula, M. N. Piancastelli, M. Simon, and M. Oura
“Deep-core photoionization of krypton atoms below and above the 1s ionization threshold”
Phys. Rev. A 101, 053405(2020)

S. Kosugi, F. Koike, M. Iizawa, M. Oura, T. Gejo, K. Tamasaku, J. R. Harries, R. Guillemin, M. N. Piancastelli, M. Simon, and Y. Azuma,
“Fluorescence Time Delay in Multistep Auger Decay as an Internal Clock”
Phys. Rev. Lett. 124, 183001 (2020)

S. Kosugi, F. Koike, T. Nagayasu, F. Hosseini, J. Martins, T. Marchenko, O. Travnikova, M. Oura, T. Gejo, J. R. Harries, J. D. Bozek, K. Ito, E. Sokell, S. Fritzsche, M. N. Piancastelli, M. Simon, and Y. Azuma,
“Strong configuration interaction in the 3p photoelectron spectrum of Kr”
Phys. Rev. A 101, 042505 (2020)

Tatsuo Gejo, Kohei Mekawa, Kenji Honma, and Yusuke Tamenori
“The Measurement of XAFS of Amino Acid in Water Submicron Particles”
SPring-8 Section A: Scientific Research Report, Volume 8 No.1 (2020), DOI：10.18957/rr.8.1.25

M. Oura, T. Gejo, K. Nagaya, Y. Kohmura, K. Tamasaku, L. Journel, M. N. Piancastelli and M. Simon,
“Hard x-ray photoelectron spectroscopy on heavy atoms and heavy element containing molecules using synchrotron radiation up to 35 keV at SPring-8 undulator beamlines”,
New Journal of Physics, 21 (2019) 043015

Nacer Boudjemia, Kari Jankala, Tatsuo Gejo, Kiyonobu Nagaya, Kenji Tamasaku, Marko Huttula, Maria Novella Piancastelli, Marc Simon and Masaki Oura
“Deep core photoionization of iodine in CH3Iand CF3I molecules: how deep down does the chemical shift reach?”
Physical Chemistry Chemical Physics 21, 10 (2019)

T. Gejo, M. Oura, T. Tokushima, Y. Horikawa, H. Arai, V. Kimberg, and N. Kosugi
“Resonant inelastic x-ray scattering and photoemission measurement of O2: Direct evidence for dependence of Rydberg-valence mixing on vibrational states in O 1s → Rydberg states”,
J. Chem. Phys. 147, 044310 (2017).

M. N. Piancastelli, K. Jankala, L. Journel, T. Gejo, Y. Kohmura, M. Huttula, M. Simon, and M. Oura,
“X-ray versus Auger emission following Xe 1s photoionization”
Physical Review A 95, 061402(R) (2017)

Tatsuo Gejo, Asahi Morita, Kenji Honma, and Yusuke Tamenori
“The Measurement of Photoabsorption Spectra of Carbonic Acid by Photoelectron-Photoion -Photoion Coincidence Technique”
SPring-8 Section A: Scientific Research Report, Volume 5 No.2 (2017) DOI：10.18957/rr.5.2.149

Eiji Shigemasa, Hiroshi Iwayama, James R. Harries, Tatsuo Gejo, Yuichi Inubushi, Ichiro Inoue, Kenji Tamasaku,
”Observation of XFEL Induced Phenomena Using Fluorescence Spectroscopy and Its Application”,
SPring-8 / SACLA Research Report, 4 (2016) DOI：10.18957/rr.4.2.340

Masaki Oura, Lars-Philip Oloff, Ashish Chainani, Kai Rossnagel, Masaharu Matsunami, Ritsuko Eguchi1, Takayuki Kiss, Takashi Yamaguchi, Yasuhiro Nakatani, Jun Miyawaki, Kohei Yamagami, Munetaka Taguchi, Tadashi Togashi, Tetsuo Katayama, Kanade Ogawa, Makina Yabashi, Tatsuo Gejo, Katsumi Myojin, Kenji Tamasaku, Yoshihito Tanaka1, Takao Ebihara and Tetsuya Ishikawa
“Electron Dynamics Probed by Time-Resolved Hard X-ray Photoelectron Spectroscopy”
Transactions of the Materials Research Society of Japan, Vol.39, No.4, P.469-473 (2015)

Y. Horikawa, A. Yoshida, H. Arai, T. Tokushima, O. Takahashi, T. Gejo, S. Shin,
“The electronic structure of carbonate and bicarbonate ions in aqueous solution studied by soft X-ray emission spectroscopy”
Journal of Molecular Liquids 189 9 (2014)

T. Gejo, E. Shigemasa, Y. Hikosaka, O. Takahashi and K. Honma,
“Dynamics of oxygen Rydberg atom generation following O 1s inner-shell excitation of H2O”,
J. Chem. Phys. 140, 214310 (2014)

T. Gejo, T. Ikegami, K. Honma, J.R. Harries and Y. Tamenori
“Fluorescence decay processes following resonant 2p photoexcitation of Ar atoms and clusters studied using a time-resolved fluorescence and photoion coincidence technique”,
J. Phys. B: At. Mol. Opt. Phys. 46 075102 (2013)

T. Gejo, T. Tamura, K. Honma, Y. Hikosoka, E. Shigemasa and Y. Tamenori
“Angle-resolved metastable fragment yields spectra of N2 and CO in the innershell excitation energy region”,
J. Chem. Phys. 136, 054201 (2012)

Victor Kimberg, Tatsuo Gejo, Masaki Oura, Takashi Tokushima, Yuka Horikawa, Hidemi Arai, Shik Shin and Nobuhiro Kosugi,
“Rydberg-valence mixing and interchannel coupling in resonant oxygen 1s inelastic x-ray scattering of O2”
Phys. Rev. A 85, 032503 (2012)

T. Gejo, T. Ikegami, K. Honma, J.R. Harries and Y. Tamenori

“Fluorescence decay processes following resonant 2p photoexcitation of Ar atoms and clusters studied using a time-resolved fluorescence and photoion coincidence technique”,

Journal of Physics B: Atomic, Molecular & Optical Physics. in press.

T. Gejo, T. Tamura, K. Honma, Y. Hikosoka, E. Shigemasa and Y. Tamenori

“Angle-resolved metastable fragment yields spectra of N2 and CO in the innershell excitation energy region”,

J. Chem. Phys. 136, 054201 (2012)

Victor Kimberg, Tatsuo Gejo, Masaki Oura, Takashi Tokushima, Yuka Horikawa, Hidemi Arai, Shik Shin and Nobuhiro Kosugi,

“Rydberg-valence mixing and interchannel coupling in resonant oxygen 1s inelastic x-ray scattering of O₂”

Phys. Rev. A 85, 032503 (2012)

T. Gejo, M. Oura , M. Kuniwake, K. Honma, and J. R. Harries

“Dissociation and recapture dynamics in H2O following O 1s inner-shell excitation”,

Journal of Physics: Conference Series 288 (2011) 012023.

K Tabayashi, Y Tsutsumi, M Chohda, O Takahashi, Y Tamenori, I Higuchi, I H Suzuki, S Nagaoka, T Gejo and K Honma,

“Site- and geometry-specific CH-O interaction in small acetaldehyde clusters studied with core-electron excitation spectroscopy in the carbon K-edge region”

Journal of Physics: Conference Series 288 (2011) 012022

Y. Tamenori, K. Okada, K. Tabayashi, A. Hiraya, T. Gejo, and K. Honma,

“Photodissociation investigation of doubly charged ethanol clusters induced by inner-shell electron ionization”,

J. Chem. Phys. 134, 204302 (2011)

James R. Harries, T. Gejo, K. Honma, M. Kuniwake, J. P. Sullivan, M. Lebech and Y. Azuma

“Long-lived, highly excited neutral hydrogen atom production following oxygen 1s photoexcitation of gas-phase water molecules”,

J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 095101.

K. Tabayashi, K. Yamamoto, T. Maruyama, H. Yoshida, K. Okada, Y. Tamenori,

I.H. Suzuki, T. Gejo, K. Honma, “Core-electron excitation and fragmentation processes of hydrogen bonded acetic-acid clusters in the oxygen K-edge region”

J. Electron Spectro. Relat. Phenom. 184 (2011) 134?139

M. Oura, O. Takahashi, T. Gejo, T Tokushimal, Y Horikawa, Senba, H. Ohashi, S Shin

“Vibrationally resolved resonant x-ray emission spectra of diatomic molecules”

Journal of Physics: Conference Series 235 (2010) 012016.

下條竜夫

「新しい軟Ｘ線分光法」分光研究、59巻3号 128-139 (2010) （査読有り）

Y. Tamenori, O. Takahashi, K. Yamashita, Y. Yamaguchi, K. Okada, K. Tabayashi,

T. Gejo and K. Honma, “Hydrogen bonding in acetone clusters probed by NEXAFS spectroscopy in the carbon and oxygen K-edge regions”,

J. Chem. Phys. 131, 174311 (2009).

Y. Tamenori, T. Yamaguchi, K. Okada, K. Yamamoto, K. Tabayashi, A. Hiraya,

T. Gejo, and K. Honma,

“Hydrogen bonding in alcohol probed by partial ion yield spectroscopy of K-shell excited methanol and ethanol clusters”

J. Chem. Phys. 128 (2008) 124321.

Y. Tamenori, K. Okada, K. Tabayashi, T. Gejo, and K. Honma,

“Specific fragmentation of [(CH3)2CO]Arⁿ heteroclusters induced by the Ar L23-

and O K-shell excitation”, Chem. Phys. Letters, 350 (2008) 558-564

Y. Haruyama, T. Kitagawa, K. Kanda, S. Matsui, T. Gejo, N. Toyoda and I. Yamada,

“X-ray photoelectron Spectroscopy Study of Diamond-Like Carbon Thin Films Formed by Ar Gas Cluster Ion Beam-Assisted Fullerene Deposition”,

Jpn. J. Appl. Phys., 47 (2008) 3380-3383

T. Gejo, M. Iseda, T. Tamura, K. Honma, J.R. Harries and Y. Tamenori

“The investigation of ionization threshold region of Ar cluster by observing of fluorescence lifetime”,

J. Electron Spectro. Relat. Phenom. 155 (2007) 119?123

T. Gejo, M. Machida, K. Honma, E. Shigemasa, E. Nakamura, N. Kosugi and Y. Tamenori,

“The vibrational structure of the lowest energy satellite bands in the C 1s core level photoemission of CO”,

J. Electron Spectro. Relat. Phenom. 156-158 (2007) 274?278

Y. Tamenori, K. Okada, K. Tabayashi, A. Hiraya, T. Gejo, and K. Honma

“On the formation of H₃O⁺ by the soft X-ray ionization of ethanol clusters”

Chem. Phys. Letters, 350 (2007) 558-564

Y. Hikosaka, T. Gejo, T. Tamura, K. Honma, Y. Tamenori and E. Shigemasa

“Core-valence multiply excited states in N₂ probed by detecting metastable fragments”

J. Phys. B: At. Mol. Opt. Phys. 39 (2007) 2059-2069.

M. Kato, Y. Morishita, M. Oura, H. Yamaoka, Y. Tamenori, K. Okada, T. Matsudo,

T. Gejo, H Suzuki and N. Saito,

“Absolute photoionization cross sections with ultra-high energy resolution for Ar, Kr, Xe, and N2 inner-shell ionization regions”,

J. Electron Spectro. Relat. Phenom. 160 (2007) 39-48.

M. Kato, Y. Morishita, F. Koike, S. Fritzsche, H. Yamaoka, Y. Tamenori, K. Okada, T. Matsudo,

T. Gejo, H Suzuki and N. Saito,

“High-resolution absolute photoabsorption cross sections for Ne in the 1s2s and 1s2p resonant double excitation”,

J. Phys. B: At. Mol. Opt. Phys. 39 (2006) 2059-2069.

K. Tabayashi, K. Yamaoto, O. Takahashi, Y. Tamenori, J. Harris, T. Gejo, M. Iseda, T. Tamura, K. Honma, I.H. Suzuki, S. Nagaoka, and T. Ibuki,

“Inner-shell excitation spectroscopy and fragmentation of small hydrogen-bonded clusters of formic acid after core-excitations at the oxygen K-edge”

J. Chem.Phys. 125 (2006) 194307

T. Gejo , E. Shigemasa, E. Nakamura,

“Development of symmetry-resolved threshold photoelectron spectroscopy technique”

Review of Scientific Instruments 77, (2006) 036112

Y. Tamenori, T. Yamaguchi, K. Okada, K. Tabayashi,　T. Gejo and K. Honma

“Inner-shell excitation of Ethanol cluster at O K-edge”

J. Electron Spectro. Relat. Phenom. 144-147, (2005) 235-238

S. Masuda, T. Gejo, M. Hiyama and N. Kosugi,

“Rydberg-valence mixing in core excitations of C₂H₂: Angle resolved photo-ion yield spectroscopy”

J. Electron Spectro. Relat. Phenom. 144-147, (2005) 215-218

Y. Hikosaka, E. Nakamura, T. Kaneyasu, T. Tamura, T. Gejo, E. Shigemasa,

“New probes for multi-electron processes accompanying molecular core-hole creations”

Proceeding of 10th Ionized workshop of processes. Campinus, Brazil (2005) 87

E. Shigemasa,　E. Nakamura, T. Gejo ,

”New molecular inner-shell spectroscopy for probing multiple excitations”,

AIP Proceedings 705 (2004) 1118-1122

M. Hosaka, M. Katoh, A. Mochihashi, J. Yamazaki, K. Hayashi, Y. Takashima, T. Gejo, E. Shigemasa, and E. Nakamura,

“Status and Prospects of User Applications of the UVSOR Storage Ring Free Electron Laser”

AIP Conf. Proc. 705, (2004) 61-64

T. Gejo , E. Shigemasa, E. Nakamura, M. Hosaka, S. Koda, A. Mochihashi, M. Katoh, J. Yamazaki, K. Hayashi, Y. Takashima, and H. Hama

“The investigation of excited states of Xe atoms and dimers by synchronization of FEL and SR pulses at UVSOR”

Nucl. Instrum. Meth. A 528 (2004) 627-631

K. Okada, S. Tanimoto, T. Morita, T. Ibuki, Y. Haga, T. Gejo, K. Saito, and K. Ohno

“Angle-resolved, mass-selected ion spectroscopy of carbon K-shell excited CF₃CCH”

Chem. Phys. 304 (2004), 273-279

T. Gejo, Y. Takata, T. Hatsui, M. Nagasono, H. Oji, N. Kosugi, E. Shigemasa

“Angle-resolved photoion spectroscopy of NO₂ and SO₂”,

Chem. Phys. 289 (2003) 15-30

K. Kanda, Y. Shimizugawa, Y. Haruyama, I. Yamada, S. Matsui, T. Kitagawa, H. Tsubakino and T. Gejo,

“NEXAFS study on substrate temperature dependence of DLC films formed by Ar cluster ion beam assisted deposition”,

Nucl. Instrum. Meth. B 206 (2003) 880-883

「高感度同軸対称鏡型電子エネルギー分析器の製作と評価、コインシデンス分光への応用」

漁剛志、吉田啓晃、下條竜夫、間瀬一彦、長岡伸一、田中健一郎　真空４６（２００３）　３７７－３８４

K. Okada, S. Tanimoto, T. Morita, K. Saito, T. Ibuki, and T. Gejo

“Molecular Size Effect on the Site Dependent Photofragmentation of N and O K-Shell Excited CH₃CO(CH₂)_nCN (n = 0-3)”

J. Phys. Chem. A 107 (2003), 8444-8448

T. Ibuki , K. Okada, S. Tanimoto K. Saito, T. Gejo

“Fragmentation competing with energy relaxation in core-excited CF₃CN”

J. Electron Spectro. Relat. Phenom. 123 (2002) 323-331

M. Hosaka, S. Koda, M. Katoh, J. Yamazaki, K. Hayashi, K. Takashima, T. Gejo and H. Hama

“From the operation of an SRFEL to a user facility”

Nucl. Instrum. Meth. A 483 (2002) 146-151

K. Kanda, T. Kitagawa, Y. Shimizugawa, Yuichi Haruyama, S. Matsui1, M. Terasawa, H. Tsubakino, Isao Yamada, T. Gejo and M. Kamada

“Characterization of the Hard DLC Films Formed by Ar Gas Cluster Ion Beam Assisted Fullerene Deposition”　

Jap. J. Appl. Phys. 38 (2002) Suppl. 38-1

E. Shigemasa, T. Gejo, M. Nagasono, T. Hatsui, and N. Kosugi

“Double and triple excitations near the K-shell ionization threshold of N₂ revealed by symmetry-resolved spectroscopy”,

Phys. Rev. A 66 (2002) art. no. 022508

K. Takahashi, T. Nakayama, Y. Matsumi, S. Solomon, T. Gejo, E. Shigemasa, T. J. Wallington

“Atmospheric Lifetime of SF₅CF₃”

Geophysical Research Letters, 29 (2002): art. no. 1712

K. Okada, S. Tanimoto, T. Ibuki, K. Saito, and T. Gejo,

“Assignment of the C K-Shell Photoabsorption Spectrum of CF₃CN Molecule”

Chem. Lett. (2001) 1046-1049

T. Ibuki , K. Okada, K. Saito, T. Gejo, N. Saito and H. Suzuki,

“Angle, energy and mass-resolved ion spectroscopy of core-excited polyatomic molecules”

Nucl. Instrum. Meth. A 467 (2001) 1505-1508

T. Gejo, J. A. Harrison and J. R. Huber,

“Depletion spectrum of ozone in a molecular beam Evidence for interference effect

in the Hartley band ”,

Chem. Phys. Letters, 350 (2001) 558-564

T. Gejo and E. Shigemasa (invited)

“Pump /Probe Experiments with FEL and SR Pulses at UVSOR”

Proceeding of the workshop of scientific opportunities with the SOLEIL Free Electron Laser, Paris(2001).

K. Kanda, Y. Shimizugawa, Y. Haruyama, I. Yamada, S. Matsui, T. Kitagawa, M. Terasawa, H. Tsubakino, , T. Gejo and M. Kamada

“Near-edge Xray Absorption Fine Structure of Hard Carbon Film Formated by Gas Cluster Ion Beam Assisted Deposition”　Mat. Rss. Soc. Symp. Proc. Vol. 695, L3,.25, Boston (2001)

T. Ibuki , K. Okada, K. Saito and T. Gejo,

“Molecular size effect on the site-specific fragmentation of N and O K shell excited CH₃OCOCN and CH₃OCOCH₂CN molecules ”,

J. Electron Spectro. Relat. Phenom., 107 (2000) 39-47

T. Ibuki , K. Okada, T. Gejo and K. Saito,

“Angle-resolved photofragmentation of the N and K shell excited CF₃CN molecule”,

Chem. Phys. Letters, 328 (2000) 147-152

A. Naves de Brito, S. Sundin, R. R. Marinho, G. Fraguas, I. Hjclt, T. Gejo, N. Kosugi and S. Svensson and O. Bjorneholm, “Memories of excited femtoseconds:　effects of core-hole localization after Auger decay in the fragmentation of ozone”,

Chem. Phys. Letters, 328 (2000) 177-187

P. Houston, R Toumi, T.Gejo and T. Suzuki

"Exploration of a Possible Explanation for the "ozone Deficit"",

NEDO International Joint Research Report (1999)

T. Gejo, K. Okada, T. Ibuki and N. Saito,

“Photodissociation of Ozone in the K-edge Region”,

J. Phys. Chem. A 103 (1999) 4598-4601

T. Ibuki , K. Okada, T. Gejo and K. Saito

“K shell excitation of some Organic Molecules”,

J. Electron Spectro. Relat. Phenom., 101/103 (1999) 149-154

I. Ouchi, Nakai, M. Kamada, S. Tanaka, T. Gejo and T. Hagiwara,

“Structure and soft x-ray absorption spectra of oriented polyester films”

Jap. J. Appl. Phys. 38 (1999) Suppl. 38-1

T. Gejo, K. Okada and T. Ibuki,

“Photoabsorption Spectrum of Ozone in the K-edge Region”,

Chem. Phys. Letters, 277 (1997) 497-501

A. Furlan, T. Gejo and J. R. Huber,

"Probing curve crossing by wavelength dependent recoil anisotropy: The photodissociation of CF₃I at 275-303 nm studied by photofragment translational spectroscopy ",

J. Phys. Chem., 100 (1996) 7956-7961

T. Gejo, J. A. Harrison and J. R. Huber,

"The three-body photodissociation of 1,3,5-triazine",

J. Phys. Chem., 100 (1996) 13941-13949

T. Gejo, H. Bitto and J. R. Huber,

"Quantum beats in the S₁ dynamics of acetaldehyde ",

Chem. Phys. Letters, 261 (1996) 443-450

T. Gejo, P. Felder and J. R. Huber,

"The concerted photodissociation of azomethane at 193 nm",

Chem. Phys., 195 (1995) 423-433

M.-A. Thelen, T. Gejo, J. A. Harrison and J. R. Huber,

"The photodissocation of ozone in the Hartly band: Fluctuation of the vibrational state distribution in the O₂(¹Dg) fragment",

J. Chem. Phys., 103 (1995) 7946-7955

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