Kazumasa Okada

Last Updated :2024/06/04

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
E-mail
okadakhiroshima-u.ac.jp
Self-introduction
A researcher on the spectroscopy and photochemistry in the soft X-ray region.

Basic Information

Academic Degrees

  • Doctor of Science, Hiroshima University
  • Master of Science, Hiroshima University

Educational Activity

  • [Bachelor Degree Program] School of Science : Chemistry : Chemistry
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Chemistry Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Chemistry Program

Research Fields

  • Chemistry;Basic chemistry;Physical chemistry

Research Keywords

  • Reaction Dynamics
  • Soft X-Ray Photochemistry
  • Elementary Reaction
  • Molecular Spectroscopy

Educational Activity

Course in Charge

  1. 2024, Undergraduate Education, 1Term, Introduction to Chemistry A
  2. 2024, Undergraduate Education, First Semester, Exercises in Chemistry
  3. 2024, Undergraduate Education, 1Term, Physical Chemistry IA
  4. 2024, Undergraduate Education, 2Term, Physical Chemistry IB
  5. 2024, Undergraduate Education, First Semester, Special Study for Graduation
  6. 2024, Undergraduate Education, Second Semester, Special Study for Graduation
  7. 2024, Undergraduate Education, First Semester, Chemical Experiments I
  8. 2024, Undergraduate Education, Second Semester, Chemical Experiments II
  9. 2024, Graduate Education (Master's Program) , 3Term, Quantum Chemistry
  10. 2024, Graduate Education (Master's Program) , First Semester, Exercises in Chemistry A
  11. 2024, Graduate Education (Master's Program) , Second Semester, Exercises in Chemistry B
  12. 2024, Graduate Education (Master's Program) , Academic Year, Master's Thesis in Chemistry
  13. 2024, Graduate Education (Doctoral Program) , Academic Year, Doctoral Thesis in Chemistry

Research Activities

Academic Papers

  1. Variation in resonant Auger yields into the (1)G4 center dot nl states of Kr across the L-3 threshold, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 38(4), 421-431, 20050228
  2. On the ionization energy of CF3SF5 in the valence region measured by angle-resolved photoelectron spectroscopy, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 152(1-2), 96-99, 200606
  3. Doppler effect in resonant excitation of CF3SF5 probed by Auger electron spectroscopy, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 154(3), 53-59, 200702
  4. Absolute photoionization cross sections with ultra-high energy resolution for Ar, Kr, Xe and N-2 in inner-shell ionization regions, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 160(1-3), 39-48, 200708
  5. Hydrogen bonding in methanol clusters probed by inner-shell photoabsorption spectroscopy in the carbon and oxygen K-edge regions, JOURNAL OF CHEMICAL PHYSICS, 128(12), 20080328
  6. Specific fragmentation of [(CH3)(2)CO]Ar-n heteroclusters induced by the Ar L-23- and O K-shell excitation, CHEMICAL PHYSICS LETTERS, 462(1-3), 40-44, 20080901
  7. Specific Fragmentation of K-Shell Excited/Ionized Pyridine Derivatives Studied by Electron Impact: 2-Amino-3-methylpyridine and 3-Methylpyridine, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 81(12), 1580-1583, 20081215
  8. ★, Photofragmentation of the K-shell excited perfluorocyclobutane: anisotropies in the fragments and breakdown pathways, JOURNAL OF MASS SPECTROMETRY, 46(7), 635-639, 201107
  9. Experimental and theoretical study of resonant Auger decay of core-excited NO${}_2$, Chemical Physics Letters, 399(4-6), 426-432, 20041201
  10. Deformation, nuclear motion and fragmentation of core-excited CO${}_2$ probed by multiple-ion coincidence momentum imaging, Journal of Electron Spectroscopy and Related Phenomena, 141(2-3), 183-193, 20041201
  11. Angle-resolved, mass-selected ion spectroscopy of carbon K-shell excited CF${}_3$CCH, Chemical Physics, 304(3), 273-279, 20041001
  12. Total photoabsorption cross-sections of CF3SF5 in the C, F and S K-shell regions, Chemical Physics Letters, 392(4-6), 303-308, 20040711
  13. Satellite excitations due to internal inelastic scattering in the K-shell photoemission from CO${}_2$, Journal of Electron Spectroscopy and Related Phenomena, 137-140, 265-269, 20040701
  14. Mass-selected ion spectroscopy of K-shell excited polyatomic molecules: Fragmentation competing with intramolecular energy relaxation, Recent Research Developments in Chemical Physics, 5(1), 77-97, 20040401
  15. Asymmetric peaks of photoelectrons and Auger electrons formed through post-collision interaction following Kr 2p${}_{3/2}$ hole creation, Journal of Physics, B37(7), 1433-1441, 20040301
  16. Probe of bending motion following the 1s${}^{-1}$$pi^*$ excitation of N${}_2$O, Journal of Chemical Physics, 120(8), 3635-3641, 20040201
  17. Asymmetric nuclear motion of the F 1s-ionized state in BF${}_3$ probed by quadruple-ion-coincidence momentum imaging, Physical Review, A69(2), 022506, 20040201
  18. Branching ratios of multiply charged ions formed through photoionization of Kr 3d, 3p and 3s sub-shells using a coincidence technique, Journal of Physics, B37(1), 117-129, 20040101
  19. Doppler effect in resonant photoemission from SF${}_6$: Correlation between Doppler profile and Auger emission anisotropy, Physical Review Letters, 91(21), 213003, 20031101
  20. Vacuum ultraviolet absorption spectra of solid hydrogen halides, Surface Review and Letters, 9(2), 1351-1356, 20020401
  21. Symmetry breaking of a SiF${}_4$ molecule by F 1s excitation, Surface Review and Letters, 9(1), 89-92, 20020201
  22. Resonant Auger spectra of Kr near the $L_3$ threshold, Surface Review and Letters, 9(1), 85-88, 20020201
  23. Auger electron spectra of Kr2p holes using monochromatic soft X-rays, Surface Review and Letters, 9(1), 63-67, 20020201
  24. Resonant Auger Decay of Xe $3d^{-1}6p$ to Xe${}^+$ $4d^{-2}np$, Surface Review and Letters, 9(1), 51-55, 20020201
  25. Initial decomposition process of energetic compound NTO, Proceedings of the 22nd International Symposium on Shock Waves, 123-128, 20000401
  26. Reaction-path dynamics study of competing channels in the thermal unimolecular decomposition of isoxazole, The Journal of Physical Chemistry, 100(22), 9365-9369, 19960501
  27. Photoabsorption and fluorescence excitation spectra of CF${}_3$CN in the region of 6-41 eV, Chemical Physics Letters, 263(1-2), 173-177, 19961201
  28. Photoabsorption spectrum of ozone in the K-edge region, Chemical Physics Letters, 277(5-6), 497-501, 19971001
  29. C${}_6$F${}_5$X (X=H, F, Cl, Br and I) excited radical cation formation in the 10-40 eV region, Chemical Physics Letters, 292(4-6), 638-642, 19980801
  30. Photodissociation of ozone in the K edge region, The Journal of Physical Chemistry, A103(24), 4598-4601, 19990601
  31. K shell excitations of some organic molecules, Journal of Electron Spectroscopy and Related Phenomena, 101-103, 149-154, 19990601
  32. Auger electron spectra of CF${}_3$CN, CF${}_3$Cl, CF${}_2$Cl${}_2$ and CFCl${}_3$, Chemical Physics, 244(2-3), 439-448, 19990601
  33. Molecular size effect on the site-specific fragmentation of N and O K shell excited CH${}_3$OCOCN and CH${}_3$OCOCH${}_2$CN molecules, Journal of Electron Spectroscopy and Related Phenomena, 107(1), 39-47, 20000301
  34. High-resolution angle-resolved ion-yield measurements of H${}_2$O and D${}_2$O in the region of O 1s to Rydberg transitions, Chemical Physics Letters, 326(3-4), 314-320, 20000801
  35. Angle-resolved photofragmentation of the N K-shell excited CF${}_3$CN molecule, Chemical Physics Letters, 328(1-2), 147-152, 20000901
  36. Molecular deformation in the O $1s^{-1}2{\pi}_u$ excited states of CO${}_2$ probed by the triple-differential measurement of fragment ions, Physical Review, A62(4), 042503-1-042503-5, 20001001
  37. High resolution angle-resolved measurements of Auger emission from the photo-excited $1s^{-1}3p$ state of Ne, Journal of Physics, B33(20), L685-L689, 20001001
  38. Nuclear motion in the O $1s^{-1}2{\pi}_u$ core-excited states of CO${}_2$ probed by sub-natural-width resonant Auger emission spectroscopy, Chemical Physics Letters, 330(1-2), 91-96, 20001101
  39. Sub-natural-width angle-resolved resonant Auger electron spectroscopy of atoms and molecules on the high resolution soft X-ray monochromator at SPring-8, Journal of Electron Spectroscopy and Related Phenomena, 114-116(1-3), 63-68, 20010301
  40. H${}_2^+$ formation from H${}_2$O${}^+$ mediated by the core-excitation-induced nuclear motion in H${}_2$O, Physical Review, A63(4), 042705-1-042705-5, 20010401
  41. High resolution measurement for the resonant Auger emission of Xe following 3d${}_{5/2}$ to 6p excitation, Journal of Physics, B34(11), L377-L382, 20010601
  42. Monochromator for a soft X-ray photochemistry beamline BL27SU of SPring-8, Nuclear Instruments and Methods in Physics Research, A467-468(1), 533-536, 20010701
  43. Angle-resolved electron and ion spectroscopy apparatus on the soft X-ray photochemistry beamline BL27SU at SPring-8, Nuclear Instruments and Methods in Physics Research, A467-468(2), 1502-1504, 20010701
  44. Angle, energy and mass-resolved ion spectroscopy of core-excited polyatomic molecules, Nuclear Instruments and Methods in Physics Research, A467-468(2), 1505-1508, 20010701
  45. Assignment of the C K-shell photoabsorption spectrum of CF${}_3$CN molecule, Chemistry Letters, 2001(10), 1046-1047, 20011001
  46. Symmetry-resolved vibrational spectroscopy for the C1s${}^{-1}$2${\pi}_u$ Renner-Teller pair states in CO${}_2$, Physical Review Letters, 88(8), 083001/1-083001/5, 20020201
  47. Fragmentation competing with energy relaxation in core-excited CF${}_3$CN, Journal of Electron Spectroscopy and Related Phenomena, 123(2-3), 323-331, 20020501
  48. A study on multi-charged Xe ions formed through 3d hole states using a coincidence technique, Journal of Physics, B35(12), 2799-2809, 20020601
  49. Angle-resolved ion-yield measurements of CO${}_2$ in the O 1s to Rydberg excitation region, Physical Review, A66(3), 032503/1-032503/5, 20020901
  50. Symmetry-dependent multielectron excitations near the C 1s ionization threshold and distortion of the shape resonance in CO${}_2$, Physical Review Letters, 89(2), 023006/1-023006/4, 20020701
  51. Doppler interference in dissociative resonant photoemission, Physical Review, A66(2), 022509/1-022509/10, 20020801
  52. Probing doubly excited ionic states of N${}_2^+$ via a triple excitation above the N 1s threshold in the N${}_2$ molecule, Physical Review, A67(3), 032504/1-032504/4, 20030301
  53. Nuclear motion and symmetry breaking of the B 1s-excited BF${}_3$ molecule, Chemical Physics, 289(1), 135-147, 20030401
  54. Anisotropic ultrafast dissociation probed by the Doppler effect in resonant photoemission from CF${}_4$, Physical Review Letters, 90(23), 233006/1-233006/4, 20030601
  55. Molecular size effect on the site dependent photofragmentation of N and O K-shell excited CH${}_3$CO(CH${}_2$)${}_n$CN (n = 0-3), The Journal of Physical Chemistry, A107(41), 8444-8448, 20031001
  56. Formation mechanisms of multi-charged Kr ions through 2p shell photoionization using a coincidence technique, 39(6), 1323-1335, 20060401
  57. Electron-ion-ion triple coincidence spectroscopic study of site-specific fragmentation caused by Si:2p core-level photoionization of F3SiCH2CH2Si(CH3)3 vapor, Physical Review A, 75, 020502(R)/4, 20070201
  58. Inner-shell Excitation of Ethanol Cluster at O K-edge, Journal of Electron Spectroscopy and Related Phenomena, 144-147, 235-238, 20050601
  59. Vibrational Effect on the Fragmentation Dynamics of the C K-shell Excited CF2CH2, Journal of Electron Spectroscopy and Related Phenomena, 144-147, 187-189, 20050601
  60. Shake-off of loosely bound electrons in Auger decays of Kr 2p core hole statesY., Physical Review A, 72(4), 044702/4, 20051027
  61. High-resolution absolute photoabsorption cross sections for Ne in the 1s2s and 1s2p resonant double excitation, Journal of Physics B: At. Mol. Opt. Phys., 39(8), 2059-2069, 20060428
  62. Absolute photoionization cross section with an ultra-high energy resolution for Ne in the region of 1s Rydberg states, Synchrotron Radiation Instrumentation: Ninth Int. Conf. Synchrotron Rad. Instrum., 879, 1121-1124, 20070119
  63. Formation of H3O+ by the soft X-ray ionization of ethanol clusters, Chem. Phys. Lett., 433(1-3), 43-47, 20061201
  64. Hydrogen bonding in acetone clusters probed by near-edge x-ray absorption fine structure spectroscopy in the carbon and oxygen K-edge regions, J. Chem. Phys., 131(17), 174311, 20091101
  65. Specific fragmentation of the K-shell excited/ionized pyridine derivatives studied by electron impact: 2-, 3- and 4-Methylpyridine, J. Mass Spectrom., 45(3), 306, 20100201
  66. Core-electron excitation and fragmentation processes of hydrogen bonded acetic-acid clusters in the oxygen K-edge region, Journal of Electron Spectroscopy and Related Phenomena, 184(3-6), 134-139, 20110401
  67. Photodissociation investigation of doubly charged ethanol clusters induced by inner-shell electron ionization, The Journal of Chemical Physics, 134(20), 204302-1-204302-9, 20110501
  68. Photofragmentation of the K-shell excited perfluorocyclobutane: Anisotropies in the fragments and breakdown pathways, Journal of Mass Spectrometry, 46(7), 635-639, 20110701
  69. Effect of fluoro substitution on the fragmentation of the K-shell excited/ionized pyridine studied by electron impact, Journal of Mass Spectrometry, 46(7), 666-671, 20110701
  70. Molecular size effect on the site-specific fragmentation of N and O K shell excited CH3OCOCN and CH3OCOCH2CN molecules, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 107(1), 39-47, 200003
  71. Sub-natural-width angle-resolved resonant Auger electron spectroscopy of atoms and molecules on the high resolution soft X-ray monochromator at SPring-8, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 114, 63-68, 200103
  72. High-resolution angle-resolved ion-yield measurements of H2O and D2O in the region of O 1s to Rydberg transitions, CHEMICAL PHYSICS LETTERS, 326(3-4), 314-320, 20000818
  73. Angle-resolved photofragmentation of the NK-shell excited CF3CN molecule, CHEMICAL PHYSICS LETTERS, 328(1-2), 147-152, 20000922
  74. Molecular deformation in the O 1s(-1)2 pi(u) excited states of CO2 probed by the triple-differential measurement of fragment ions, PHYSICAL REVIEW A, 62(4), 200010
  75. High resolution angle-resolved measurements of Auger emission from the photo-excited 1s(-1)3p state of Ne, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 33(20), L685-L689, 20001028
  76. Nuclear motion in the O 1s(-1)2 pi(u) core-excited states of CO2 probed by sub-natural-width resonant Auger emission spectroscopy, CHEMICAL PHYSICS LETTERS, 330(1-2), 91-96, 20001103
  77. Angle-resolved electron and ion spectroscopy apparatus on the soft X-ray photochemistry beamline BL27SU at SPring-8, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 467, 1502-1504, 20010721
  78. Angle, energy and mass-resolved ion spectroscopy of core-excited polyatomic molecules, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 467, 1505-1508, 20010721
  79. Monochromator for a soft X-ray photochemistry beamline BL27SU of SPring-8, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 467, 533-536, 20010721
  80. Assignment of the CK-shell photoabsorption spectrum of CF3CN molecule, CHEMISTRY LETTERS, 1046-1047, 20011005
  81. Stereoselective formation of trans-2,5-disubstituted tetrahydropyrans by intramolecular nucleophilic substitution and a computational study at the AM1 level, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 74(10), 1901-1907, 200110
  82. Fragmentation competing with energy relaxation in core-excited CF3CN, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 123(2-3), 323-331, 200205
  83. Symmetry-dependent multielectron excitations near the C 1s ionization threshold and distortion of the shape resonance in CO2, PHYSICAL REVIEW LETTERS, 89(2), 20020708
  84. A study on multi-charged Xe ions formed through 3d hole states using a coincidence technique, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 35(12), 2799-2809, 20020628
  85. Reinvestigation of base-induced skeletal conversion via a spirocyclic intermediate of dibenzodithiocinium derivatives and a computational study using the HF/6-31G*basis set, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, 2704-2711, 2002
  86. Resonant auger decay of Xe 3d(-1)6p to Xe+4d(-2)np, SURFACE REVIEW AND LETTERS, 9(1), 51-55, 200202
  87. Auger electron spectra of Kr2p holes using monochromatic soft X-rays, SURFACE REVIEW AND LETTERS, 9(1), 63-67, 200202
  88. Resonant Auger spectra of Kr near the L-3 threshold, SURFACE REVIEW AND LETTERS, 9(1), 85-88, 200202
  89. Symmetry breaking of a SiF4 molecule by F 1s excitation, SURFACE REVIEW AND LETTERS, 9(1), 89-92, 200202
  90. Doppler interference in dissociative resonant photoemission, PHYSICAL REVIEW A, 66(2), 200208
  91. Vacuum ultraviolet absorption spectra of solid hydrogen halides, SURFACE REVIEW AND LETTERS, 9(2), 1351-1356, 200204
  92. Angle-resolved ion-yield measurements of CO2 in the O 1s to Rydberg excitation region, PHYSICAL REVIEW A, 66(3), 200209
  93. Nuclear motion and symmetry breaking of the B 1s-excited BF3 molecule, CHEMICAL PHYSICS, 289(1), 135-147, 20030401
  94. Probing doubly excited ionic states of N-2(+) via a triple excitation above the N 1s threshold in the N-2 molecule, PHYSICAL REVIEW A, 67(3), 200303
  95. Anisotropic ultrafast dissociation probed by the Doppler effect in resonant photoemission from CF4, PHYSICAL REVIEW LETTERS, 90(23), 20030613
  96. Molecular size effect on the site dependent photofragmentation of N and O K-shell excited CH3CO(CH2)(n)CN (n=0-3), JOURNAL OF PHYSICAL CHEMISTRY A, 107(41), 8444-8448, 20031016
  97. Doppler effect in resonant photoemission from SF6: Correlation between doppler profile and auger emission anisotropy, PHYSICAL REVIEW LETTERS, 91(21), 20031121
  98. Branching ratios of multiply charged ions formed through photoionization of Kr 3d, 3p and 3s sub-shells using a coincidence technique, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 37(1), 117-129, 20040114
  99. Probe of bending motion following the 1s(-1)pi(*) excitation of N2O, JOURNAL OF CHEMICAL PHYSICS, 120(8), 3635-3641, 20040222
  100. Asymmetric peaks of photoelectrons and Auger electrons formed through post-collision interaction following Kr 2p(3/2) hole creation, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 37(7), 1433-1441, 20040414
  101. Satellite excitations due to internal inelastic scattering in the K-shell photoemission from CO2, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 137, 265-269, 200407
  102. Total photoabsorption cross-sections of CF3SF5 in the C, F and SK-shell regions, CHEMICAL PHYSICS LETTERS, 392(4-6), 303-308, 20040711
  103. Angle-resolved, mass-selected ion spectroscopy of carbon K-shell excited CF3CCH, CHEMICAL PHYSICS, 304(3), 273-279, 20041004
  104. Experimental and theoretical study of resonant Auger decay of core-excited NO2, CHEMICAL PHYSICS LETTERS, 399(4-6), 426-432, 20041201
  105. Deformation, nuclear motion and fragmentation of core-excited CO2 probed by multiple-ion coincidence momentum imaging, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 141(2-3), 183-193, 200412
  106. Energy relaxation through the pi(*)-state in C, F and O K-shell excited CF3COCH3, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 143(1), 21-27, 200504
  107. Photofragmentation of C, F and SK-shell excited CF3SF5 studied by PEPICO and PIPICO spectroscopy, CHEMICAL PHYSICS, 314(1-3), 119-126, 20050718
  108. Vibrational effect on the fragmentation dynamics of the CK-shell excited CF2CH2, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 144, 187-189, 200506
  109. High-resolution resonant Auger spectroscopy of CF4, SiF4, and SF6, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 144, 199-202, 200506
  110. Inner-shell excitation of ethanol cluster at OK-edge, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 144, 235-238, 200506
  111. Interference effects in Auger resonant Raman spectra of CO via selective vibrational excitations across the O 1s -> 2 pi resonance, PHYSICAL REVIEW A, 72(2), 200508
  112. Shake-off of loosely bound electrons in Auger decays of Kr 2p core hole states, PHYSICAL REVIEW A, 72(4), 200510
  113. Site-specific fragmentation caused by core-level photoexcitation: Comparison between Si : 1s and 2p photoexcitations in F3SiCH2CH2Si(CH3)(3) vapor, INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 247(1-3), 101-105, 20051201
  114. Formation mechanisms of multi-charged Kr ions through 2p shell photoionization using a coincidence technique, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 39(6), 1323-1335, 20060328
  115. High-resolution absolute photoabsorption cross sections for Ne in the 1s2s and 1s2p resonant double excitation, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 39(8), 2059-2069, 20060428
  116. Formation of multi-charged Kr ions through photoionization of 2p electrons studied with a coincidence technique, RADIATION PHYSICS AND CHEMISTRY, 75(11), 1778-1783, 200611
  117. Electron-ion-ion triple-coincidence spectroscopic study of site-specific fragmentation caused by Si : 2p core-level photoionization of F3SiCH2CH2Si(CH3)(3) vapor, PHYSICAL REVIEW A, 75(2), 200702
  118. Hydrogen bonding in acetone clusters probed by near-edge x-ray absorption fine structure spectroscopy in the carbon and oxygen K-edge regions, JOURNAL OF CHEMICAL PHYSICS, 131(17), 20091107
  119. Specific fragmentation of the K-shell excited/ionized pyridine derivatives studied by electron impact: 2-, 3-and 4-methylpyridine, JOURNAL OF MASS SPECTROMETRY, 45(3), 306-312, 201003
  120. Photodissociation investigation of doubly charged ethanol clusters induced by inner-shell electron ionization, JOURNAL OF CHEMICAL PHYSICS, 134(20), 20110528
  121. Core-electron excitation and fragmentation processes of hydrogen bonded acetic-acid clusters in the oxygen K-edge region, JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 184(3-6), 134-139, 201104
  122. Effect of fluoro substitution on the fragmentation of the K-shell excited/ionized pyridine studied by electron impact, JOURNAL OF MASS SPECTROMETRY, 46(7), 666-671, 201107
  123. ★, Specific fragmentation of the K-shell excited/ionized aniline molecule studied by electron impact, INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 351, 56-60, 20131001
  124. ★, Hydration structure of trimethylamine N-oxide in aqueous solutions revealed by soft X-ray emission spectroscopy and chemometric analysis, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 18(39), 27648-27653, 20161021
  125. H2+ formation from H2O+ mediated by the core-excitation-induced nuclear motion in H2O, Physical review A, 63(4), 42705-1-042705-5, 200104
  126. Hydrogen bonding in methanol clusters probed by inner-shell photoabsorption spectroscopy in the carbon and oxygen K-edge regions, Journal of Chemical Physics, 128(12), 20080331
  127. Hydration of the Zwitterionic and Protonated Forms of Glycine Betaine Probed by Soft X-ray Emission Spectroscopy Coupled with Chemometrics, JOURNAL OF PHYSICAL CHEMISTRY B, 125(7), 1881-1887, 20210225

Invited Lecture, Oral Presentation, Poster Presentation

  1. Hydration Structure of Acetone Studied with Concentration-Dependent Absorption Spectra in the Ultraviolet Region, C. Sugahara, K. Matsuo, K. Okada, The 27th Hiroshima International Symposium on Synchrotron Radiation, 2023/03/09, Without Invitation, English, Higashi-Hiroshima
  2. Complex formation of glycine betaine with salt studied by liquid-phase inner-shell absorption spectroscopy, S. Ohsawa, H. Yuzawa, M. Nagasaka, H. Iwayama, K. Okada, UVSOR Symposium 2020, 2020/10/26, Without Invitation, Japanese
  3. The change of hydration structure of glycine betaine by salt addition studied by soft X-ray absorption spectroscopy, S. Ohsawa, H. Yuzawa, M. Nagasaka, H. Iwayama, K. Okada, UVSOR Symposium 2019, 2019/11/16, Without Invitation, Japanese
  4. Hydration structure of N,N-dimethylglycine studied by soft X-ray absorption spectroscopy, N. Fukuda, H. Yuzawa, M. Nagasaka, K. Okada, UVSOR Symposium 2019, 2019/11/16, Without Invitation, Japanese
  5. Site-specific fragmentation of the C K-shell excited cis-hexafluorocyclobutane molecule probed by the Auger-electron-photoion coincidence method, S. Ishikawa, K. Okada, H. Iwayama, E. Shigemasa, Hiroshima International Symposium on Future Science 2014, 2014/03, Without Invitation, English, Higashi-Hiroshima
  6. Variation in resonant Auger spectra of cis-hexafluorocyclobutane across the F K threshold, T. Kaneda, K. Okada, H. Iwayama, E. Shigemasa, The 30th Symposium on Chemical Kinetics and Dynamics, 2014/06/04, Without Invitation, English, Himeji
  7. Photofragmentation of the K-shell excited cis-1,1,2,2,3,4-hexafluorocyclobutane probed by partial ion yield and multiple-ion coincidence methods, K. Okada, T. Nakashima, Y. Kajitani, I. H. Suzuki, S. Nagaoka, Y. Tamenori, International Workshop on Photoionization and Resonant Inelastic X-Ray Scattering 2014, 2014/08, Without Invitation, English, Erice, Italy
  8. Soft X-ray emission spectroscopy of aqueous solutions of trimethylamine-N-oxide at the O K-edge, Y. Sasaki, Y. Horikawa, T. Tokushima, K. Okada, M. Oura, M. Aida, The 31st Symposium on Chemical Kinetics and Dynamics, 2015/06/03, Without Invitation, English, Sapporo
  9. Screening effect of the spectator electron as illuminated by the 2-D resonant Auger spectra of 1,1,1-trifluoroethane in the F 1s region, T. Kaneda, K. Okada, H. Iwayama, E. Shigemasa, The 31st Symposium on Chemical Kinetics and Dynamics, 2015/06/03, Without Invitation, English, Sapporo
  10. Spectator Auger decays of fluorocarbon molecules across the F 1s threshold, T. Kaneda, H. Iwayama, K. Okada, E. Shigemasa, Recent Progress in Molecular Science of Korea and Japan, 2015/07/30, Without Invitation, English, Higashi-Hiroshima
  11. Auger spectra of the fragment ions formed through the rearrangement of the C 1s-excited 3,3,3-trifluoropropene molecule, R. Tateishi, T. Kaneda, H. Iwayama, M. Kono, K. Okada, E. Shigemasa, The 12th Nano Bio Info Chemistry Symposium, 2015/12/05, Without Invitation, English, Higashi-Hiroshima
  12. Soft X-ray emission spectroscopy of aqueous solutions of trimethylamine-N-oxide at the O K-edge, Y. Sasaki, Y. Horikawa, T. Tokushima, K. Okada, M. Oura, and M. Aida, 39th International Conference on Vacuum Ultraviolet and X-Ray Physics (VUVX2016), 2016/07/04, Without Invitation, English, Zurich, Switzerland
  13. Variation in resonant Auger spectra of cis-hexafluorocyclobutane in the F 1s region, K. Okada, T. Kaneda, H. Iwayama, and E. Shigemasa, 39th International Conference on Vacuum Ultraviolet and X-Ray Physics (VUVX2016), 2016/07/04, Without Invitation, English, Zurich, Switzerland
  14. Spectator Auger decays of cis-1,1,2,2,3,4-hexafluorocyclobutane in the F 1s region, K. Okada, T. Kaneda, H. Iwayama, and E. Shigemasa, The 30th International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2017), 2017/07/27, Without Invitation, English, Cairns, Australia
  15. Effect of salt addition to glycine betaine aqueous solutions on the electronic structure of water studied by soft X-ray absorption spectroscopy, Shohei Ohsawa, Hiroshi Iwayama, Hayato Yuzawa, Masanari Nagasaka, Kazumasa Okada, The 15th Nano Bio Info Chemistry Symposium, 2018/12/08, Without Invitation, English, Higashi-Hiroshima, Japan

Social Activities

Organizing Academic Conferences, etc.

  1. International Workshop on Photoionization (IWP2002), 2002/08, 2002/08
  2. The 35th Symposium on Chemical Kinetics and Dynamics, Treasurer, 2019/06, 2019/06