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Journal Articles

Absorbent property of fullerene for cesium isotope separation investigated using X-ray photoelectron spectroscopy

Sekiguchi, Tetsuhiro; Yokoyama, Keiichi; Uozumi, Yuki*; Yano, Masahiro; Asaoka, Hidehito; Suzuki, Shinichi; Yaita, Tsuyoshi

Progress in Nuclear Science and Technology (Internet), 5, p.161 - 164, 2018/11

https://doi.org/10.15669/pnst.5.161

For nuclear transmutation of cesium-135 ( $^{135}$ Cs), which is long-lived fission product, we are developing selective absorbent which takes only Cs atom in, but does not CsI. In this study, absorbing property of Cs atom onto the surface of fullerene (C $_{60}$ ) film has been investigated using synchrotron-based angle-dependent X-ray photoelectron spectroscopy (XPS). The results were compared with those of CsI. It was found that Cs penetrates into C $_{60}$ deep bulk. In contrast, CsI deposits on shallow surface. Furthermore, XPS spectra were measured as a function of Ar $^{+}$ -sputtering time in order to know Cs concentration profiles in deep region. Results showed that Cs penetrates into deep region of several hundreds .

Journal Articles

Theoretical study of the adsorption of Cs, Cs, I, I, and CsI on C $_{60}$ fullerene

Kobayashi, Takanori; Yokoyama, Keiichi

Journal of Nuclear Science and Technology, 53(10), p.1489 - 1493, 2016/10

https://doi.org/10.1080/00223131.2015.1126206

Times Cited Count：6 Percentile：49.29(Nuclear Science & Technology)

Theoretical investigation for the adsorption of the cesium atom (Cs), the cesium iodide molecule (CsI), the iodine atom (I), the cesium cation (Cs), and the iodide anion (I) onto the surface of a single fullerene molecule (C $_{60}$ ) are reported. A hybrid exchange-correlation functional using the Coulomb-attenuating method (CAM-B3LYP) is employed. The adsorption energies, i.e., the opposite of enthalpy change through adsorption, are calculated to be 34, 3, 2, 11, and 12 kcal mol $^{-1}$ for Cs, CsI, I, Cs, and I, respectively. The equilibrium constant for Cs is calculated to be 710 atm $^{-1}$ at the temperature of 1000 K and is seven orders of magnitude higher than that for CsI, indicating that the C $_{60}$ molecule adsorb the Cs atom highly selectively against the CsI molecule.

Journal Articles

Generation of negative fullerene ions using SNICS ion source

Chiba, Atsuya; Usui, Aya; Yamada, Keisuke

Dai-28-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.53 - 56, 2015/12

no abstracts in English

Journal Articles

Novel technique for generating negative fullerene ions using a cesium sputter ion source

Chiba, Atsuya; Usui, Aya; Yamada, Keisuke

Dai-27-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.56 - 59, 2015/03

Utilization of the swift fullerene ion beam in TIARA using the tandem accelerator tends to increase year after year. However, only a few currents obtained by a generating method of negative ions with a cesium sputtering is hindrance to the progress of study. A generating method of the negative fullerene ions is developed on the basis of an electron attachment. As a result, the method permits us to obtain stable beam intensity more than a thousand-fold compared with that produced by the sputtering method.

Journal Articles

Production of endohedral $^{133}$ Xe-higher fullerenes by ion implantation

Watanabe, Satoshi; Katabuchi, Tatsuya*; Ishioka, Noriko; Matsuhashi, Shimpei; Muramatsu, Hisakazu*

Journal of Radioanalytical and Nuclear Chemistry, 272(3), p.467 - 469, 2007/06

https://doi.org/10.1007/s10967-007-0605-3

Times Cited Count：1 Percentile：11.32(Chemistry, Analytical)

no abstracts in English

Journal Articles

MeV cluster ions from TIARA 3MV tandem accelerator

Saito, Yuichi; Chiba, Atsuya; Narumi, Kazumasa

Dai-18-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.47 - 49, 2005/11

no abstracts in English

Journal Articles

Conversion of endohedral $^{133}$ Xe-fullerene to endohedral $^{133}$ Xe-fullerenol to be used in nuclear medicine

Watanabe, Satoshi; Ishioka, Noriko; Sekine, Tsutomu*; Kudo, Hiroshi*; Shimomura, Haruhiko*; Muramatsu, Hisakazu*; Kume, Tamikazu

Journal of Radioanalytical and Nuclear Chemistry, 266(3), p.499 - 502, 2005/11

https://doi.org/10.1007/s10967-005-0938-8

Times Cited Count：9 Percentile：53.19(Chemistry, Analytical)

no abstracts in English

Journal Articles

Production of fullerene (C $_{60}$ ) ions by freeman ion source

Okoshi, Kiyonori; Saito, Yuichi; Orimo, Takao*; Omae, Akiomi*; Takada, Isao; Tajima, Satoshi

JAERI-Review 2003-033, TIARA Annual Report 2002, p.323 - 324, 2003/11

https://jopss.jaea.go.jp/pdfdata/JAERI-Review-2003-033-p0188-p0390.pdf

no abstracts in English

Journal Articles

Synthesis of endohedral $^{133}$ Xe-fullerol

Watanabe, Satoshi; Ishioka, Noriko; Shimomura, Haruhiko*; Muramatsu, Hisakazu*; Kume, Tamikazu

JAERI-Review 2003-033, TIARA Annual Report 2002, p.262 - 263, 2003/11

https://jopss.jaea.go.jp/pdfdata/JAERI-Review-2003-033-p0188-p0390.pdf

no abstracts in English

Journal Articles

Dose dependence of the production yield of endohedral $^{133}$ Xe-fullerene by ion implantation

Watanabe, Satoshi; Ishioka, Noriko; Shimomura, Haruhiko*; Muramatsu, Hisakazu*; Sekine, Toshiaki

Nuclear Instruments and Methods in Physics Research B, 206(1-4), p.399 - 402, 2003/05

https://doi.org/10.1016/S0168-583X(03)00771-7

Times Cited Count：8 Percentile：50.24(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Production of endohedral $^{133}$ Xe-fullerene by ion implantation

Watanabe, Satoshi; Ishioka, Noriko; Sekine, Toshiaki; Osa, Akihiko; Koizumi, Mitsuo; Shimomura, Haruhiko*; Yoshikawa, K.*; Muramatsu, Hisakazu*

Journal of Radioanalytical and Nuclear Chemistry, 255(3), p.495 - 498, 2003/03

https://doi.org/10.1023/A:1022524214082

Times Cited Count：11 Percentile：59.38(Chemistry, Analytical)

no abstracts in English

Journal Articles

Modification of C $_{60}$ thin films by ion irradiation

Narumi, Kazumasa; Naramoto, Hiroshi

Surface & Coatings Technology, 158-159, p.364 - 367, 2002/09

Irradiation effect of 7 MeV $^{12}$ C $^{2+}$ ions on C $_{60}$ thin films on Si(111) substrates were investigated. Raman scattering spectroscopy showed that C $_{60}$ film had been already polymerized and that depolymerization of the polymerized C $_{60}$ films progressed up to the dose of 1.110 $^{14}$ /cm $^{2}$ . After the depolymerization, the C $_{60}$ films were transformed into a form of amorphous carbon at higher dose. The AFM analysis of conductivity of the film shows the results consistent with the Raman-scattering-spectroscopy analysis of the film.

Journal Articles

Ferromagnetism and giant magnetoresistance in the rare-earth fullerides Eu $_{6-x}$ SrC $_{60}$

Ishii, Kenji; Fujiwara, Akihiko*; Suematsu, Hiroyoshi*; Kubozono, Yoshihiro*

Physical Review B, 65(13), p.134431_1 - 134431_6, 2002/03

https://doi.org/10.1103/PhysRevB.65.134431

Times Cited Count：32 Percentile：78.19(Materials Science, Multidisciplinary)

We have studied crystal structure, magnetism and electric transport properties of a europium fulleride EuC $_{60}$ and its Sr-substituted compounds, Eu $_{6-x}$ SrC $_{60}$ . They have a structure, which is an isostructure of other C $_{60}$ ( represents an alkali atom or an alkaline earth atom). Magnetic measurements revealed that magnetic moment is ascribed to the divalent europium atom with = 7/2 spin, and a ferromagnetic transition was observed at = 10 - 14 K. In EuC $_{60}$ , we also confirm the ferromagnetic transition by heat capacity measurement. The striking feature in Eu $_{6-x}$ SrC $_{60}$ is very large negative magnetoresistance at low temperature; the resistivity ratio ( = 9 T)/( = 0 T) reaches almost 10 $^{-3}$ at 1 K in EuC $_{60}$ . Such large magnetoresistance is the manifestation of a strong - interaction between conduction carriers on C $_{60}$ and 4 electrons of Eu.

Journal Articles

Temperature dependence of growth process of C $_{60}$ thin films on a KBr(001) surface

Narumi, Kazumasa; Naramoto, Hiroshi

JAERI-Review 2001-039, TIARA Annual Report 2000, p.190 - 192, 2001/11

https://doi.org/10.11484/jaeri-review-2001-039

no abstracts in English

Journal Articles

AFM Investigation of growth process of C $_{60}$ thin films on a KBr(001) surface

Narumi, Kazumasa; Naramoto, Hiroshi

Diamond and Related Materials, 10(3-7), p.980 - 983, 2001/03

https://doi.org/10.1016/S0925-9635(00)00541-0

Times Cited Count：3 Percentile：22.29(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Isolation and characterization of light actinide metallofullerenes

Akiyama, Kazuhiko; Zhao, Y.*; Sueki, Keisuke*; Tsukada, Kazuaki; Haba, Hiromitsu; Nagame, Yuichiro; Kodama, Takeshi*; Suzuki, Shinzo*; Otsuki, Tsutomu*; Sakaguchi, Masahiko*; et al.

Journal of the American Chemical Society, 123(1), p.181 - 182, 2001/01

https://doi.org/10.1021/ja005618n

Times Cited Count：66 Percentile：84.91(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles