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as a source of atmospheric I
Watanabe, Kosuke*; Matsuda, Shohei; Cuevas, C. A.*; Saiz-Lopez, A.*; Yabushita, Akihiro*; Nakano, Yukio*
ACS Earth and Space Chemistry (Internet), 3(4), p.669 - 679, 2019/04
Times Cited Count：8 Percentile：42.7(Chemistry, Multidisciplinary)The photooxidation of aqueous iodide ions (I
) at sea surface results in the emission of gaseous iodine molecules (I
) into the atmosphere. It plays a certain role in the transport of iodine from ocean to the atmosphere in the natural cycle of iodine. In this study, we determined the photooxidation parameters, the molar absorption coefficient (
(
)) and the photooxidative quantum yields (
()) of I, in the range of 290-500 nm. Through the investigation of the influence of pH and dissolved oxygen (DO) on (), the subsequent emission rates of I following the photooxidation of I in deionized water solution (pH 5.6, DO 7.8 mg L
) and artificial seawater solution (pH 8.0, DO 7.0 mg L) were estimated. A global chemistry-climate model employed herein to assess the I ocean emission on a global scale indicated that the photooxidation of I by solar light can enhance the atmospheric iodine budget by up to 
8% over some oceanic regions.
Baba, Yuji
Trends in Vacuum Science & Technology, Vol.5, p.45 - 74, 2002/10
This article reviews recent works on the ion desorption from solid surfaces induced by the irradiation of soft X-rays ranging from 100 eV to 3 keV. The data presented here are focused on the positive ion desorption from adsorbed, condensed, and solid molecules following the core-level excitations. The element-specific and site-specific fragment-ion desorptions are clearly realized, when we tune the photon energy at the core-to-valence resonance regions. The specificity of the ion desorption more clearly shows up following the deep-core excitations, i.e., 1s
4p resonant excitations in third-row elements, rather than the shallow-core excitations. Since the main decay channels after the core-level excitation are the Auger transitions, the Auger decay spectra excited by the photons around the core-level thresholds are also presented for some of the adsorbed systems. The mechanism of the observed highly specific ion desorption is discussed on the basis of the photon-energy dependencies of the electron and ion yields and the analysis of the Auger decay spectra.
Sekiguchi, Tetsuhiro; Sekiguchi, Hiromi*; Baba, Yuji
Surface Science, 454-456, p.363 - 368, 2000/05
Times Cited Count：23 Percentile：72.41(Chemistry, Physical)no abstracts in English
Seguchi, Tadao
Hoshasen To Sangyo, 11(81), p.48 - 49, 1999/03
no abstracts in English
)F) physisorbed on Cu(111) following Si K-shell excitationSekiguchi, Tetsuhiro; Baba, Yuji
Photon Factory Activity Report 1998, Part B, P. 261, 1997/11
no abstracts in English
and SiCl by resonant photoexcitation at chlorine K-edgeBaba, Yuji; Yoshii, Kenji; Sasaki, Teikichi
Surface Science, 376(1-3), p.330 - 338, 1997/00
Times Cited Count：25 Percentile：78.49(Chemistry, Physical)no abstracts in English
Baba, Yuji; Yoshii, Kenji; Yamamoto, Hiroyuki; Sasaki, Teikichi; W.Wurth*
Material Chemistry 96: Proc. of Int. Symp. on Material Chemistry in Nuclear Environment, 0, p.391 - 399, 1996/00
no abstracts in English
JAERI-M 90-054, 57 Pages, 1990/03
no abstracts in English
; ;
Journal of Nuclear Science and Technology, 16(7), p.527 - 530, 1979/00
Times Cited Count：0no abstracts in English
and LiSO; R.S.Williams*; J.S.Wong*; D.A.Shirley*
Journal of Chemical Physics, 68(6), p.2718 - 2724, 1978/06
Times Cited Count：48no abstracts in English
Ono, Shinichi
Kagaku No Ryoiki, 27(7), p.562 - 567, 1973/07
no abstracts in English
