JOPSS - Search Results

Journal Articles

Mechanism of state-specific enhancement in photon-stimulated desorption as studied using a polarization-dependent technique

Sekiguchi, Tetsuhiro; Baba, Yuji; Shimoyama, Iwao; Wu, G.*; Kitajima, Yoshinori*

Surface Science, 593(1-3), p.310 - 317, 2005/11

https://doi.org/10.1016/j.susc.2005.06.076

Times Cited Count：2 Percentile：11.64(Chemistry, Physical)

Using a newly developed rotatable time-of-flight mass spectrometer(R-TOF-MS) and polarized synchrotron radiation, orientation effect on fragmentation and desorption pathways occurring at the top-most layers of molecular solids have been investigated. Reported will be polarization-angle dependencies of TOF mass spectra, high-resolution electron- and ion-NEXAFS in condensed chlorobenzene.

Journal Articles

Direct and indirect processes in photon-stimulated ion desorption from condensed formamide

Ikeura, Hiromi*; Sekiguchi, Tetsuhiro; Baba, Yuji; Imamura, Motoyasu*; Matsubayashi, Nobuyuki*; Shimada, Hiromichi*

Surface Science, 593(1-3), p.303 - 309, 2005/11

https://doi.org/10.1016/j.susc.2005.06.075

Times Cited Count：5 Percentile：26.1(Chemistry, Physical)

no abstracts in English

Journal Articles

Introduction of imaging detection into a time-of-flight mass spectrometer to improve the dynamic range in the isotope ratio measurement

Katayama, Atsushi; Furukawa, Katsutoshi; Watanabe, Kazuo

Bunseki Kagaku, 52(6), p.461 - 467, 2003/06

https://doi.org/10.2116/bunsekikagaku.52.461

Times Cited Count：0 Percentile：0.01(Chemistry, Analytical)

An imaging ion detection system was introduced to a time-of-flight mass spectrometer (TOFMS) in order to increase dynamic range in the isotope ratio measurements. The new detection system utilizes a position sensitive micro channel plate (MCP) with a phosphor plate and a CCD camera which records light spots on the MCP. Mass discriminated ion beams produced by laser resonance ionization were swept on the surface of MCP by a time-depended electric field located in front of the MCP. The resulting light spots were recorded as images by CCD camera. A mass spectrum was obtained from the images. The present method was applied to the isotope analysis of calcium. A dynamic range of more than 5 orders of magnitude was achieved.

Journal Articles

Orientation effect on phot-fragmentation and ion-desorption from the topmost layers of molecular solids

Sekiguchi, Tetsuhiro; Ikeura, Hiromi*; Baba, Yuji

Surface Science, 532-535(1-3), p.1079 - 1084, 2003/06

Using a newly developed rotatable time-of-flight mass spectrometer(R-TOF-MS) and polarized synchrotron radiation, we have investigated orientation effect on fragmentation and desorption pathways occurring at the top-most layers of molecular solids. Reported will be polarization-angle dependencies of TOF mass spectra, high-resolution electron- and ion-NEXAFS in condensed formic acid, formamide and benzene. For condensed formamide(HCOND $_{2}$ ), marked orientation effect was observed for the enhanced H $^{+}$ -yields following C1s * $_{C-H}$ resonance. Direct photodissociation and charge-neutralization play an important role in the effect. For some fragment species, however, the bond scission showed no polarization dependence when dissociation sites were far from core-excited atoms. This is the case for N-D scission and D $^{+}$ -desorption following C1s excitation, suggesting that indirect process governs, where secondary electrons would induce the fragmentation.

Journal Articles

Ammoniated ammonium ions studied theoretically and experimentally, ab initio calculation and tandem mass spectrometer experiments

Ikezoe, Yasumasa; Suzuki, Kazuya

Journal of the Mass Spectrometry Society of Japan, 48(4), p.254 - 262, 2000/04

https://doi.org/10.5702/massspec.48.254

no abstracts in English

Journal Articles

Developments of high-resolution quadrupole mass spectrometer and ceramic single-piece quadrupole

Abe, Tetsuya; Hiroki, Seiji

FC Report, 15(12), p.276 - 278, 1997/00

no abstracts in English

Journal Articles

High-resolution mass spectrometric analysis of gases released from graphite during sequential helium and deuterium glow discharge cleanings

Hiroki, Seiji; *; *; Abe, Tetsuya; Murakami, Yoshio

Journal of Nuclear Materials, 224, p.293 - 298, 1995/00

https://doi.org/10.1016/0022-3115(95)00074-7

Times Cited Count：7 Percentile：59.15(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Isotope effect in the photodissociation of ammoniated ammonium ions by CO $_{2}$ laser

Ikezoe, Yasumasa; Soga, Takeshi; Suzuki, Kazuya; Ono, Shinichi*

Journal of the Mass Spectometry Society of Japan, 43(5), p.257 - 263, 1995/00

https://doi.org/10.5702/massspec.43.257

no abstracts in English

Journal Articles

Applicability of the rf-only mode in a quadrupole mass spectrometer for direct analysis of keV ions

Hiroki, Seiji; *; Murakami, Yoshio

Vacuum, 46(12), p.1445 - 1447, 1995/00

https://doi.org/10.1016/0042-207X(95)00168-9

Times Cited Count：7 Percentile：40.68(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Detection of a 10 $^{-4}$ helium peak in a deuterium atmosphere using a modified high-resolution quadrupole mass spectrometer

Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio

Review of Scientific Instruments, 65(6), p.1912 - 1917, 1994/06

https://doi.org/10.1063/1.1144842

Times Cited Count：20 Percentile：82.6(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Development of a QMS with a ceramic single-piece quadrupole

Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio; *; *; *

Vacuum, 44(2), p.71 - 74, 1993/00

https://doi.org/10.1016/0042-207X(93)90350-J

Times Cited Count：2 Percentile：16.19(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Development of a quadrupole mass spectrometer using the second stable zone in Mathieus stability diagram

Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio

Review of Scientific Instruments, 62(9), p.2121 - 2124, 1991/09

https://doi.org/10.1063/1.1142377

Times Cited Count：15 Percentile：81.27(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Recombination of N $_{4+}$ and N $_{3+}$ with electrons in atmospheric pressure nitrogen

Ikezoe, Yasumasa; *; *

Chemical Physics Letters, 177(4-5), p.366 - 370, 1991/03

https://doi.org/10.1016/0009-2614(91)85067-7

Times Cited Count：12 Percentile：43.49(Chemistry, Physical)

no abstracts in English

Journal Articles

Development of a movable quadrupole mass spectrometer for measuring gas density

Hiroki, Seiji; Abe, Tetsuya; Obara, Kenjiro; Murakami, Yoshio

J. Vac. Sci. Technol., A, 9(1), p.154 - 157, 1991/01

no abstracts in English

JAEA Reports

CO $_{2}$ laser photolysis of clustered ions, I

Ikezoe, Yasumasa; Soga, Takeshi; Suzuki, Kazuya; Ono, Shinichi

JAERI-M 90-141, 55 Pages, 1990/09

JAERI-M-90-141.pdf:1.38MB

no abstracts in English

Journal Articles

Ions in carbon dioxide at atmospheric pressure, 5; Reactions in CO $_{2}$ -CO-CH $_{4}$ -H $_{2}$ O mixtures and coolant chemistry

Ikezoe, Yasumasa; Onuki, Kaoru; Shimizu, Saburo; *; Tagawa, S.*; Tabata, Yoneho*

Radiation Physics and Chemistry, 36(3), p.279 - 284, 1990/00

https://doi.org/10.1016/1359-0197(90)90005-3

no abstracts in English

Journal Articles

Ion-molecule reactions and thermal decomposition of ions in N $_{2}$ -O $_{2}$ -alkane(C $_{2}$ -C $_{6}$ ) mixtures studied by time-resolved atmospheric pressure ionization mass spectrometry

*; Ikezoe, Yasumasa

J.Phys.Chem., 92(5), p.1126 - 1133, 1988/05

no abstracts in English

Journal Articles

Ions in carbon dioxide at an atmospheric pressure, 3; Formation of( $^{1}$ $^{8}$ O $_{2}$ (CO) $_{2}$ ) $^{+}$ (CO $_{2}$ ) $_{n}$ in a CO $_{2}$ -CO- $^{1}$ $^{8}$ O $_{2}$ mixture

Ikezoe, Yasumasa; ; Shimizu, Saburo; ; *; *

J.Phys.Chem., 88(24), p.5945 - 5948, 1984/00

no abstracts in English

Journal Articles

Ionic reactions in an atmospheric pressure carbon dioxide; Their implications to the radiolysis of carbon dioxide

Ikezoe, Yasumasa; *;

Shitsuryo Bunseki, 32(5), p.449R - 453R, 1984/00

no abstracts in English

Journal Articles

Mass-spectrometric study of the negatively-charged krypton and xenon monofluorides

; Abe, Shinichi

Nuclear Instruments and Methods, 212, p.533 - 537, 1983/00

no abstracts in English

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Mechanism of state-specific enhancement in photon-stimulated desorption as studied using a polarization-dependent technique

Direct and indirect processes in photon-stimulated ion desorption from condensed formamide

Introduction of imaging detection into a time-of-flight mass spectrometer to improve the dynamic range in the isotope ratio measurement

Orientation effect on phot-fragmentation and ion-desorption from the topmost layers of molecular solids

Ammoniated ammonium ions studied theoretically and experimentally, ab initio calculation and tandem mass spectrometer experiments

Developments of high-resolution quadrupole mass spectrometer and ceramic single-piece quadrupole

High-resolution mass spectrometric analysis of gases released from graphite during sequential helium and deuterium glow discharge cleanings

Isotope effect in the photodissociation of ammoniated ammonium ions by CO $_{2}$ laser

Applicability of the rf-only mode in a quadrupole mass spectrometer for direct analysis of keV ions

Detection of a 10 $^{-4}$ helium peak in a deuterium atmosphere using a modified high-resolution quadrupole mass spectrometer

Development of a QMS with a ceramic single-piece quadrupole

Development of a quadrupole mass spectrometer using the second stable zone in Mathieus stability diagram

Recombination of N $_{4+}$ and N $_{3+}$ with electrons in atmospheric pressure nitrogen

Development of a movable quadrupole mass spectrometer for measuring gas density

CO $_{2}$ laser photolysis of clustered ions, I

Ions in carbon dioxide at atmospheric pressure, 5; Reactions in CO $_{2}$ -CO-CH $_{4}$ -H $_{2}$ O mixtures and coolant chemistry

Ion-molecule reactions and thermal decomposition of ions in N $_{2}$ -O $_{2}$ -alkane(C $_{2}$ -C $_{6}$ ) mixtures studied by time-resolved atmospheric pressure ionization mass spectrometry

Ions in carbon dioxide at an atmospheric pressure, 3; Formation of( $^{1}$ $^{8}$ O $_{2}$ (CO) $_{2}$ ) $^{+}$ (CO $_{2}$ ) $_{n}$ in a CO $_{2}$ -CO- $^{1}$ $^{8}$ O $_{2}$ mixture

Ionic reactions in an atmospheric pressure carbon dioxide; Their implications to the radiolysis of carbon dioxide

Mass-spectrometric study of the negatively-charged krypton and xenon monofluorides