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Journal Articles

$$^{13}$$C-selective infrared multiple photon dissociation of $$beta$$-propiolactone by a free electron laser

Miyomoto, Yoshiki*; Majima, Tetsuro*; Arai, Shigeyoshi*; Katsumata, Keiichi*; Akagi, Hiroshi; Maeda, Akihiko*; Hata, hiroo*; Kuramochi, Koji*; Kato, Yoshiyasu*; Tsukiyama, Koichi*

Nuclear Instruments and Methods in Physics Research B, 269(2), p.180 - 184, 2011/01

 Times Cited Count:11 Percentile:67.63(Instruments & Instrumentation)

Journal Articles

Silicon isotope separation utilizing infrared multiphoton dissociation of Si$$_{2}$$F$$_{6}$$ irradiated with two-frequency CO$$_{2}$$ laser lights

Yokoyama, Atsushi; Oba, Hironori; Hashimoto, Masashi; Katsumata, Keiichi; Akagi, Hiroshi; Ishii, Takeshi*; Oya, Akio*; Arai, Shigeyoshi*

Applied Physics B, 79(7), p.883 - 889, 2004/11

 Times Cited Count:9 Percentile:42.98(Optics)

Silicon isotope separation has been done utilizing the Infrared Multiphoton Dissociation of Si$$_{2}$$F$$_{6}$$ irradiated with two-frequency CO$$_{2}$$ laser lights. The two-frequency excitation method improved the separation efficiency with keeping the high enrichment factors. For example, Si$$_{2}$$F$$_{6}$$ with the $$^{28}$$Si fraction of 99.4 % was obtained at 40.0 % dissociation of Si$$_{2}$$F$$_{6}$$ after the simultaneous irradiation of 100 pulses with 966.23 cm$$^{-1}$$ photons (0.089 J/cm$$^{2}$$) and 954.55 cm$$^{-1}$$ photons (0.92 J/cm$$^{2}$$), while 1000 pulses were needed to obtain 99.0 % of $$^{28}$$Si at 27.2 % dissociation in the case of single frequency irradiation at 954.55 cm$$^{-1}$$ (0.92 J/cm$$^{2}$$). The single-step enrichment factors of $$^{29}$$Si and $$^{30}$$Si increased with increasing Si$$_{2}$$F$$_{6}$$ pressure. The reason for this enhancement has been discussed in terms of the rotational and vibrational relaxations by collisions with ambient gases.

Journal Articles

High enrichment of $$^{28}$$Si by infrared multiple photon decomposition of Si$$_{2}$$F$$_{6}$$

Yokoyama, Atsushi; Oba, Hironori; Shibata, Takemasa; Kawanishi, Shunichi*; Sugimoto, Shunichi*; Ishii, Takeshi*; Oya, Akio*; Miyamoto, Yoshiki*; Isomura, Shohei*; Arai, Shigeyoshi*

Journal of Nuclear Science and Technology, 39(4), p.457 - 462, 2002/04

 Times Cited Count:2 Percentile:17.46(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Emission characteristics of silver atoms in $$gamma$$-irradiated organic solid solutions at 77K

*; Hase, Hirotomo*; *; Taguchi, Mitsumasa; *; Arai, Shigeyoshi*

Journal of Physical Chemistry B, 102(43), p.8389 - 8394, 1998/00

 Times Cited Count:6 Percentile:22.37(Chemistry, Physical)

no abstracts in English

Journal Articles

Emission and excitation spectra of silver atoms in $$gamma$$-irradiated aqueous, ethanol, and 2-methyltetrahydrofuran solutions at 77K

*; *; *; ; Arai, Shigeyoshi*

Radiation Physics and Chemistry, 49(1), p.59 - 65, 1997/00

 Times Cited Count:8 Percentile:57.02(Chemistry, Physical)

no abstracts in English

Journal Articles

L X-ray spectra of Fe and Cu by 0.75 MeV/u H, He, Si and Ar ion impacts

Kageyama, H.*; Kawatsura, Kiyoshi*; Takahashi, R.*; Arai, Shigeyoshi*; Kambara, Tadashi*; Oura, Masaki*; Papp, T.*; Kanai, Yasuyuki*; Awaya, Yoko*; Takeshita, Hidefumi; et al.

Nuclear Instruments and Methods in Physics Research B, 107(1-4), p.47 - 50, 1996/00

 Times Cited Count:2 Percentile:32.16(Instruments & Instrumentation)

no abstracts in English

Journal Articles

High energy Ni ion implantation and thermal annealing for $$alpha$$-SiC single crystal

*; Kawatsura, Kiyoshi*; Arai, Shigeyoshi*; *; *; *; *; Takeshita, Hidefumi; Yamamoto, Shunya; Aoki, Yasushi; et al.

Nuclear Instruments and Methods in Physics Research B, 91, p.529 - 533, 1994/00

 Times Cited Count:3 Percentile:43.77(Instruments & Instrumentation)

no abstracts in English

Journal Articles

PIXE and RBS study of radiation-induced segregation in single crystal austenitic stainless steel SUS 304

Kawatsura, Kiyoshi*; *; *; *; Arai, Shigeyoshi*; *; *; *; *; *; et al.

Nuclear Instruments and Methods in Physics Research B, 75, p.367 - 370, 1993/00

no abstracts in English

Journal Articles

Change in surface chemical state of polyethersulfone by excimer laser irradiation

Sugimoto, Shunichi; Kawanishi, Shunichi; Shimizu, Yuichi; Suzuki, Nobutake; *; Arai, Shigeyoshi*

RTM-91-37, p.27 - 32, 1991/00

no abstracts in English

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