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324 results on '"Tsukahara, N."'

1. Thin Ice Target for $^{16}$O(p,p') experiment

Author

Kawabata, T., Akimune, H., Fujimura, H., Fujita, H., Fujita, Y., Fujiwara, M., Hara, K., Hatanaka, K., Hosono, K., Ishikawa, T., Itoh, M., Kamiya, J., Nakamura, M., Noro, T., Obayashi, E., Sakaguchi, H., Shimbara, Y., Takeda, H., Taki, T., Tamii, A., Toyokawa, H., Tsukahara, N., Uchida, M., Ueno, H., Wakasa, T., Yamasaki, K., Yasuda, Y., Yoshida, H. P., and Yosoi, M.

Subjects
Nuclear Experiment
Abstract

A windowless and self-supporting ice target is described. An ice sheet with a thickness of 29.7 mg/cm$^2$ cooled by liquid nitrogen was placed at the target position of a magnetic spectrometer and worked stably in the $^{16}$O$(p,p')$ experiment at $E_{p}=392$ MeV. Background-free spectra were obtained., Comment: 14 pages, 4 figures, Nucl. Instr. & Meth. A (in press)

Published
2000
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4. Structures and decay of deep-hole states in light nuclei populated by the (p, 2p 2p) reactions

Author

Yosoi, M., Akimune, H., Daito, I., Ejiri, H., Fujimura, H., Fujiwara, M., Hara, K., Hara, K. Y., Ishikawa, T., Itoh, M., Itow, Y., Kawabata, T., Kobayashi, K., Nakamura, M., Noro, T., Obayashi, E., Sakaguchi, H., Sakemi, Y., Shiozawa, M., Takeda, H., Taki, T., Tamii, A., Toyokawa, H., Tsukahara, N., Uchida, M., Yamada, T., Yasuda, Y., Yoshida, H. P., and Zegers, R. G. T.

Published
2004
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7. Cluster fragmentations of deep(1 s)-hole states in light nuclei

Author

Yosoi, M., Akimune, H., Daito, I., Ejiri, H., Fujimura, H., Fujiwara, M., Fushimi, K., Hara, K., Hara, K.Y., Hashimoto, H., Ishikawa, T., Itoh, M., Itow, Y., Kishi, S., Kawabata, T., Kawase, K., Kinoshita, M., Kobayashi, K., Nakamura, M., Nakanishi, K., Nakatsugawa, Y., Nakayama, S., Noro, T., Obayashi, E., Okumura, S., Sakaguchi, H., Sakemi, Y., Shiozawa, M., Takeda, H., Taki, T., Tamii, A., Tanaka, M., Terashima, S., Toyokawa, H., Tsukahara, N., Uchida, M., Yamada, T., Yamagata, T., Yasuda, Y., Yoshida, H.P., Zegers, R.G.T., and Zenihiro, J.

Published
2004
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8. The effect of deformation in the isoscalar giant dipole resonance

Author

Itoh, M., Sakaguchi, H., Uchida, M., Ishikawa, T., Kawabata, T., Murakami, T., Takeda, H., Taki, T., Terashima, S., Tsukahara, N., Yasuda, Y., Yosoi, M., Garg, U., Hedden, M., Kharraja, B., Koss, M., Nayak, B.K., Zhu, S., Fujimura, H., Fujiwara, M., Hara, K., Yoshida, H.P., Akimune, H., Harakeh, M.N., and Volkerts, M.

Published
2004
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25. Potential Energy Surface of NO on Pt(997): Adsorbed States and Surface Diffusion

Author

Tsukahara, N. and Yoshinobu, J.

Subjects
Article Subject
Abstract

The potential energy surface (PES) of NO on Pt(997) has been elucidated: the adsorption states and diffusion processes of NO on Pt(997) at low coverage were investigated by using infrared reflection absorption spectroscopy (IRAS) and scanning tunneling microscopy (STM). When NO molecules adsorb on a surface at a low temperature (11 K), each molecule transiently migrates on the surface from the first impact point to a possible adsorption site. We found that there are four stable adsorption sites for NO on Pt(997): a bridge site of the upper step, an fcc- (or hcp-) hollow site of the terrace, an on-top site of the terrace, and an fcc-hollow site of the lower step. At higher temperatures above 45 K, NO molecules start to migrate thermally to more stable adsorption sites on a terrace, and they are finally trapped at the bridge sites of the step, which are the most stable among the four sites.

Published
2012
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28. Systematic study of L

Author

Itoh, A, Sakaguchi, H, Uchida, M, Ishikawa, T, Kawabata, T, Murakami, T, Takeda, H, Taki, T, Terashima, S, Tsukahara, N, Yasuda, Y, Yosoi, A, Garg, U, Hedden, M, Kharraja, B, Koss, M, Nayak, BK, Zhu, S., Fujimura, H, Fujiwara, M, Hara, K, Yoshida, HP, Akimune, H, Harakeh, MN, and Volkerts, A

Subjects
INELASTIC ALPHA-SCATTERING, ENERGY OCTUPOLE RESONANCE, MONOPOLE RESONANCE, DEFORMATION, SN-116, Nuclear Theory, EXCITATION, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, DIPOLE RESONANCE, PB-208, DEFORMED-NUCLEI, COLLECTIVE STATES
Abstract

Background-free inelastic scattering spectra have been obtained for five Sm isotopes with 386-MeV a particles at forward angles (including 0degrees) to investigate the effect of deformation on the compressional-mode giant resonances. The strength distributions for the Lless than or equal to3 isoscalar giant resonances have been extracted via a multipole decomposition analysis using angular distributions calculated in the framework of the density-dependent single-folding model. We observed a splitting of the giant monopole resonance because of its mixing with the giant quadrupole resonance. For the isoscalar giant dipole resonance, the observed effects of deformation are different for the low- and high-excitation-energy components. Evidence has been obtained for the theoretically predicted mixing between the isoscalar giant dipole resonance and the high energy octupole resonance.

Published
2003

29. Adsorption states of NO on the Pt(111) step surface

Author

Tsukahara, N., Mukai, K., Yamashita, Y., Yoshinobu, J., Aizawa, H., Tsukahara, N., Mukai, K., Yamashita, Y., Yoshinobu, J., and Aizawa, H.

Abstract

Using infrared reflection absorption spectroscopy (IRAS) and scanning tunneling microscopy (STM), we investigated the adsorption states of NO on the Pt(9 9 7) step surface. At 90 K, we observe three N–O stretching modes at 1490 cm−1, 1631 cm−1 and 1700 cm−1 at 0.2 ML. The 1490 cm−1 and 1700 cm−1 peaks are assigned to NO molecules at fcc-hollow and on-top sites of the terrace, respectively. The 1631 cm−1 peak is assigned to the step NO species. In the present STM results, we observed that NO molecules were adsorbed at the bridge sites of the step as well as fcc-hollow and on-top sites of the terrace. To help with our assignments, density functional theory calculations were also performed. The calculated results indicate that a bridge site of the step is the most stable adsorption site for NO, and its stretching frequency is 1607 cm−1. The interactions between NO species at different sites on Pt(9 9 7) are also discussed.

Published
2006

33. Systematic study ofL⩽3giant resonances in Sm isotopes via multipole decomposition analysis

Author

Itoh, M., primary, Sakaguchi, H., additional, Uchida, M., additional, Ishikawa, T., additional, Kawabata, T., additional, Murakami, T., additional, Takeda, H., additional, Taki, T., additional, Terashima, S., additional, Tsukahara, N., additional, Yasuda, Y., additional, Yosoi, M., additional, Garg, U., additional, Hedden, M., additional, Kharraja, B., additional, Koss, M., additional, Nayak, B. K., additional, Zhu, S., additional, Fujimura, H., additional, Fujiwara, M., additional, Hara, K., additional, Yoshida, H. P., additional, Akimune, H., additional, Harakeh, M. N., additional, and Volkerts, M., additional

Published
2003
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35. ISOSCALAR GIANT DIPOLE RESONANCE AND NUCLEAR INCOMPRESSIBILITY

Author

UCHIDA, M., primary, SAKAGUCHI, H., additional, ITOH, M., additional, YOSOI, M., additional, KAWABATA, T., additional, TAKEDA, H., additional, YASUDA, Y., additional, MURAKAMI, T., additional, ISHIKAWA, T., additional, TAKI, T., additional, TSUKAHARA, N., additional, TERASHIMA, S., additional, GARG, U., additional, HEDDEN, M., additional, KHARRAJA, B., additional, KOSS, M., additional, NAYAK, B. K., additional, ZHU, S., additional, FUJIWARA, M., additional, FUJIMURA, H., additional, HARA, K., additional, OBAYASHI, E., additional, YOSHIDA, H. P., additional, AKIMUNE, H., additional, HARAKEH, M. N., additional, and VOLKERTS, M., additional

Published
2003
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36. COMPRESSIONAL-MODE GIANT RESONANCES IN DEFORMED NUCLEI

Author

ITOH, M., primary, FUJIMURA, M., additional, FUJIWARA, M., additional, HARA, K., additional, YOSHIDA, H.P., additional, SAKAGUCHI, H., additional, UCHIDA, M., additional, ISHIKAWA, T., additional, KAWABATA, T., additional, MURAKAMI, T., additional, TAKEDA, H., additional, TAKI, T., additional, TERASHIMA, S., additional, TSUKAHARA, N., additional, YASUDA, Y., additional, YOSOI, Y., additional, GARG, U., additional, HEDDEN, M., additional, KHARRAJA, B., additional, KOSS, M., additional, NAYAK, B.K., additional, ZHU, S., additional, AKIMUNE, H., additional, HARAKEH, M.N., additional, and VOLKERTS, M., additional

Published
2003
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37. EXTRACTION OF NEUTRON DENSITY DISTRIBUTIONS FROM PROTON ELASTIC SCATTERING AT INTERMEDIATE ENERGIES

Author

TAKEDA, H., primary, SAKAGUCHI, H., additional, TERASHIMA, S., additional, TAKI, T., additional, YOSOI, M., additional, ITOH, M., additional, KAWABATA, T., additional, ISHIKAWA, T., additional, UCHIDA, M., additional, TSUKAHARA, N., additional, YASUDA, Y., additional, NORO, T., additional, YOSHIMURA, M., additional, FUJIMURA, H., additional, YOSHIDA, H.P., additional, OBAYASHI, E., additional, TAMII, A., additional, and AKIMUNE, H., additional

Published
2003
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38. Isoscalar giant dipole resonance in 208Pb via inelastic α scattering at 400 MeV and nuclear incompressibility

Author

Uchida, M, primary, Sakaguchi, H, additional, Itoh, M, additional, Yosoi, M, additional, Kawabata, T, additional, Takeda, H, additional, Yasuda, Y, additional, Murakami, T, additional, Ishikawa, T, additional, Taki, T, additional, Tsukahara, N, additional, Terashima, S, additional, Garg, U, additional, Hedden, M, additional, Kharraja, B, additional, Koss, M, additional, Nayak, B.K, additional, Zhu, S, additional, Fujiwara, M, additional, Fujimura, H, additional, Hara, K, additional, Obayashi, E, additional, Yoshida, H.P, additional, Akimune, H, additional, Harakeh, M.N, additional, and Volkerts, M, additional

Published
2003
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39. Structure and decay of the s-hole state in 11B studied via the 12C(p,2p)11B reaction

Author

Yosoi, M, primary, Akimune, H, additional, Daito, I, additional, Ejiri, H, additional, Fujimura, H, additional, Fujiwara, M, additional, Ishikawa, T, additional, Itoh, M, additional, Kawabata, T, additional, Nakamura, M, additional, Noro, T, additional, Obayashi, E, additional, Sakaguchi, H, additional, Takeda, H, additional, Taki, T, additional, Tamii, A, additional, Toyokawa, H, additional, Tsukahara, N, additional, Uchida, M, additional, Yamada, T, additional, and Yoshida, H.P, additional

Published
2003
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41. Compressional-mode giant resonances in deformed nuclei

Author

Itoh, M, primary, Sakaguchi, H, additional, Uchida, M, additional, Ishikawa, T, additional, Kawabata, T, additional, Murakami, T, additional, Takeda, H, additional, Taki, T, additional, Terashima, S, additional, Tsukahara, N, additional, Yasuda, Y, additional, Yosoi, M, additional, Garg, U, additional, Hedden, M, additional, Kharraja, B, additional, Koss, M, additional, Nayak, B.K, additional, Zhu, S, additional, Fujimura, H, additional, Fujiwara, M, additional, Hara, K, additional, Yoshida, H.P, additional, Akimune, H, additional, Harakeh, M.N, additional, and Volkerts, M, additional

Published
2002
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42. Extraction of neutron density distributions from proton elastic scattering at intermediate energies

Author

Takeda, H., primary, Sakaguchi, H., additional, Taki, T., additional, Yosoi, M., additional, Itoh, M., additional, Kawabata, T., additional, Ishikawa, T., additional, Uchida, M., additional, Tsukahara, N., additional, Noro, T., additional, Yoshimura, M., additional, Fujimura, H., additional, Yoshida, H. P., additional, Obayashi, E., additional, Tamii, A., additional, and Akimune, H., additional

Published
2002
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43. Extraction of Neutron Density Distributions from Proton Elastic Scattering at Intermediate Energies.

Author

Takeda, H., Sakaguchi, H., Tereshima, S., Taki, T., Yosoi, M., Itoh, M., Kawabata, T., Ishikawa, T., Uchida, M., Tsukahara, N., Yasuda, Y., Noro, T., Yoshimura, M., Fujimura, H., Yoshida, H.P., Obayashi, E., Tamii, A., and Akimune, H.

Subjects
PROTON scattering, ELASTIC scattering
Abstract

Cross sections, analyzing powers and spin rotation parameters of proton elastic scattering from 58Ni and 120Sn have been measured at intermediate energies. Obtained data have been analyzed in the framework of relativistic impulse approximations. In order to explain the 58Ni data, it was necessary to modify NN interactions in the nuclear medium by changing coupling constants and masses of σ and ω mesons. For 120Sn, by assuming the same modification of NN interactions and by using proton densities deduced from charge densities, the neutron density distribution was searched so as to reproduce 120Sn data at 300 MeV. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2003
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44. Thin ice target for 16O(p,p′) experiment

Author

Kawabata, T., primary, Akimune, H., additional, Fujimura, H., additional, Fujita, H., additional, Fujita, Y., additional, Fujiwara, M., additional, Hara, K., additional, Hatanaka, K., additional, Hosono, K., additional, Ishikawa, T., additional, Itoh, M., additional, Kamiya, J., additional, Nakamura, M., additional, Noro, T., additional, Obayashi, E., additional, Sakaguchi, H., additional, Shimbara, Y., additional, Takeda, H., additional, Taki, T., additional, Tamii, A., additional, Toyokawa, H., additional, Tsukahara, N., additional, Uchida, M., additional, Ueno, H., additional, Wakasa, T., additional, Yamasaki, K., additional, Yasuda, Y., additional, Yoshida, H.P., additional, and Yosoi, M., additional

Published
2001
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45. Neutron densities in [sup 120]Sn observed by polarized proton scattering.

Author

Sakaguchi, H., Takeda, H., Taki, T., Yosoi, M., Itoh, M., Kawabata, T., Ishikawa, T., Uchida, M., Tsukahara, N., Noro, T., Yoshimura, M., Fujimura, H., Yoshida, H., Obayashi, E., Tamii, A., and Akimune, H.

Subjects
TIN, ENERGY level densities, PROTON scattering
Abstract

Cross sections, analyzing powers and spin rotation parameters of proton elastic scattering from [sup 58]Ni and [sup 120]Sn have been measured at intermediate energies. By elastic scattering off N=Z nuclei like [sup 58]Ni at intermediate energies we can study medium modification of the nucleon-nucleon (NN) interaction inside the nucleus, because proton distributions in target nuclei are constrained by charge distributions measured by electron scattering and neutron distributions can be assumed to be the same as proton’s. In order to explain our experimental data of [sup 58]Ni at large scattering angles, it was found to be necessary to use experimental densities deduced from charge densities measured by electron scattering and to modify the coupling constants and the masses of exchanged σ and ω mesons in the RIA, assuming linear dependencies of meson properties to nuclear densities. Parameters of the medium effect have been searched to reproduce the data. For N≠Z nuclei, neutron density distribution can be extracted from the elastic scattering, assuming the same medium modifications fixed by the [sup 58]Ni data and using proton distributions obtained from charge distributions. We have searched neutron density distributions obtained from charge distributions. We have searched neutron density distribution so as to reproduce [sup 120]Sn data at the proton incident energy of 300 MeV. Deduced neutron distribution has an increase at the nuclear center, which is consistent with the 3s[sub 1/2] orbit wave function as expected in [sup 120]Sn. At energies other than 300 MeV, experimental data of [sup 120]Sn have been also well reproduced by the neutron distribution obtained at 300 MeV. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2001

46. NEUTRON DENSITY DISTRIBUTIONS OBSERVED BY PROTON ELASTIC SCATTERING.

Author

Takeda, H., Sakaguchi, H., Taki, T., Yosoi, M., Itoh, M., Kawabata, T., Ishikawa, T., Uchida, M., Tsukahara, N., Noro, T., Yoshimura, M., Fujimura, H., Yoshida, H., Obayashi, E., Tamii, A., and Akimune, H.

Subjects
NEUTRON density, ELASTIC scattering, PARTICLES (Nuclear physics), PARTICLE interactions, PARTICLE accelerators
Published
2000

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