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Yuri, Yosuke
no journal, ,
We have numerically studied the emittance increase rate (heating rate) of ultra-low-emittance beams in a storage ring. A systematic molecular dynamics simulation has been done, considering the same experimental conditions as those in the storage ring "S-LSR", i.e., 
Mg
ion beam with the kinetic energy of 35 keV. The heating rate has a maximum value around 
, where 
is the generalized plasma coupling constant. That is, the heating rate due to the intra-beam scattering is maximized around the threshold of the gas-to-liquid phase transition. At an ultra-low-emittance state, the heating rate becomes smaller in a perfect lattice. When the lattice magnetic error is finite, the heating rate is increased, dependent on the beam line density.
Chiba, Satoshi; Koura, Hiroyuki; Maruyama, Toshiki; Ota, Masahisa*; Tatsuda, Sayuki*; Wada, Takahiro*; Tachibana, Takahiro*; Kajino, Toshitaka*; Sumiyoshi, Kosuke*; Otsuki, Kaori*
no journal, ,
We introduce 
-delayed fission in r-process calculation, and investigate the difference of the abundance pattern of synthesized nuclei depending on the model of fission fragment mass distribution. We further discuss the impact of it on nucleo-cosmochronometer and possibility to restrict the physical condition of r-process sites.
Nishikino, Masaharu; Yamatani, Hiroshi; Sukegawa, Kota; Nagashima, Keisuke
no journal, ,
no abstracts in English
cluster ion structureAdachi, Masahiro; Saito, Yuichi; Chiba, Atsuya; Narumi, Kazumasa; Yamada, Keisuke; Kaneko, Toshiaki*
no journal, ,
no abstracts in English
and Fe
of LuFe
O
Agui, Akane; Ikeda, Naoshi*; Morimoto, Masanori*; Uozumi, Takayuki*; Kaamber, T.*
no journal, ,
no abstracts in English
Igarashi, Takahiro; Ogata, Shuji*; Kaji, Yoshiyuki
no journal, ,
no abstracts in English
Sc
O
Shimoyama, Tomotaka*; Tojo, Takeo*; Kawaji, Hitoshi*; Atake, Toru*; Fukazawa, Hiroshi; Igawa, Naoki
no journal, ,
Sc doped BaZrO is one of the canditated materials for solid state proton conductors in the middle temeprature range because of its high proton conducticivity and excellent chemical stability under the humidity. This presentation makes discusion on the crystal structure of BaZrScO with D
O using Rietveld method and Maximum Entropy method.
La
Pb
Tokunaga, Yo; Suzuki, Hiroyuki*; Sakai, Hironori; Kambe, Shinsaku; Chudo, Hiroyuki; Homma, Yoshiya*; Aoki, Dai*; Shiokawa, Yoshinobu*
no journal, ,
no abstracts in English
Hayashi, Makoto*; Kanai, Takashi*; Yamada, Takahiro*; Fujishita, Hideshi*; Igawa, Naoki; Kihara, Kuniaki*
no journal, ,
While the temperature change of the static order paramaters, such as an atom displacement and lattice destortion around the phase transition temperature is exlained by the classical Landau theory, the tempereture dependence of those parameters below the transition temperature was predicted by Salje. In this report, temperature dependence of strucural parameters of quartz was measured using the nuetron powder diffraction and analyzed by the Rietveld method to confirm the theory predicted by Salje. The quantitative analysis of present works gave a good agreement with the theory.
Segawa, Mariko; Toh, Yosuke; Harada, Hideo; Nagai, Yasuki; Koizumi, Mitsuo; Hatsukawa, Yuichi; Fukahori, Tokio; Kitatani, Fumito; Oshima, Masumi; Tsutsumi, Masahiro; et al.
no journal, ,
A new system to measure the neutron capture cross section of a nucleus in the energy range from a few keV to 20 MeV in view of the interest in nuclear astrophysics and nuclear physics, and of the applications for nuclear engineering has been installed at the facility of radiation standards at Japan Atomic Energy Agency. A prompt 
-ray spectrum from neutron capture by a sample nucleus was measured by means of an anti Compton NaI(Tl) spectrometer with a time-of-flight method. The performance of the new system was studies by measuring prompt -ray spectra from the (n,) reactions.
Shimoyama, Iwao; Li, X.*; Shimada, Takashi*
no journal, ,
Alignment of single-walled carbon nanotubes (SWNTs) is significantly important for many applications of SWNTs. Recently, it was reported that SWNTs grown by chemical vapor deposition (CVD) align along step arrays or one-dimensional atomic arrangements on some single crystal surfaces. This method is interesting to achieve large-scale alignment of SWNTs, however, the detail of the alignment mechanism has not been clarified, yet. In order to investigate the alignment mechanism, we utilized polarization dependent Raman spectroscopy for SWNTs grown on quartz single crystal surfaces by CVD. G-band of our sample showed high-frequency G
-band and low-frequency G
-band. Though both bands exhibited qualitatively same polarization dependence, the magnitude of polarization dependence of G-band was larger than that of G-band. Spectral change for different polarization configurations clarified that vibration modes were not main reason of our result. Comparing Stokes and anti-Stokes spectra, results obtained from samples with different growth conditions, and spectra measured by different resonant excitation conditions, we concluded that different magnitude of polarization dependence between G-band and G-band originated from different orientations between semiconducting SWNTs and metallic SWNTs. This result indicates selective alignment of semiconducting SWNTs on quartz single crystal surfaces.
Ishikawa, Norito; Kawasuso, Atsuo; Takagaki, Masafumi*; Suzuki, Motohiro*; Mizuki, Junichiro; Zushi, Yoshihiro*; Fujita, Naoki*; Hori, Fuminobu*; Seki, Shuhei*; Tsukuda, Satoshi*; et al.
no journal, ,
It is already found that magnetic transition temperature of Fe-50at.%Rh changes by high-energy ion irradiation. This irradiation-induced changes in magnetic properties has been investigated by magnetic force microscopy. It has been found that microscopic magnetic structure appears after ion-irradiation, and the structure changes depending on the ion-fluence. The observed structure was not the same as that observed for Fe-rich ferromagnetic Fe-45at.%Rh alloys.
Fukaya, Yuki
no journal, ,
no abstracts in English
Fukaya, Yuki; Hashimoto, Mie; Kawasuso, Atsuo; Ichimiya, Ayahiko
no journal, ,
no abstracts in English
study by neutron scattering under magnetic fieldMizuno, Fumio; Sugai, Takashi; Kaneko, Koji; Metoki, Naoto; Haga, Yoshinori; Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu*
no journal, ,
NpIn has the AuCu-type cubic structure. The structure is the same as the pressure-induced superconductor CeIn. It was reported that NpIn orders ferromagnetcally below T
= 14 K and antiferromagnetically at T
= 10 K, and a new field-induced phase (AF+FM) is found by the magnetization measurement. We reported the (0.5 0.5 0) and (0.5 0.5 1) magnetic reflections the last time. But we was not be able to determine the magnetic structure. This time, we study Q = (0.5 0.5 0) by the horizontal magnet. In the case of Q
H, the magnetic peak is observed, while in the case of Q
H, the magnetic peak is not observed. Using the relation of Q 
sin
, where is the angle between Q and a magnetic moment, we find that antiferromagnetic modulation component and the external field are parallel. That is, we come to a conclusion that the structure in which the magnetic moments expand and contract along the external field is stable.
by neutron scatteringSugai, Takashi; Mizuno, Fumio; Jonen, Shintaro*; Kaneko, Koji; Metoki, Naoto; Haga, Yoshinori; Aoki, Dai*; Homma, Yoshiya*; Shiokawa, Yoshinobu*
no journal, ,
Np-115 compounds show various magenetic structures by changing the transision metal. NpFeGa is the antiferromagnet which orders Q=(1/2 1/2 0) with two steps. Additionally NpFeGa has the magnetic moment not only on Np site but also on Fe site. By analyzing the magnetic form factor, we obtained that it was possible for Fe to have the orbital magnetic moment. It is interesting because ordinarily the orbital magnetic moment of Fe is quenched.
, 2Sato, Tomohiro*; Jarrige, I.; Ishii, Kenji; Inami, Toshiya; Mizuki, Junichiro; Bizen, Daisuke*; Murakami, Yoichi*; Miyasaka, Shigeki*; Fujioka, Jun*; Tokura, Yoshinori*
no journal, ,
no abstracts in English
Sb
Kaneko, Koji; Metoki, Naoto; Kimura, Hiroyuki*; Noda, Yukio*; Matsuda, Tatsuma; Kogi, Masafumi*
no journal, ,
no abstracts in English
Yogo, Akifumi; Ogura, Koichi; Sagisaka, Akito; Orimo, Satoshi; Ma, J.-L.; Mori, Michiaki; Nishiuchi, Mamiko; Pirozhkov, A. S.; Esirkepov, T. Z.; Bulanov, S. V.; et al.
no journal, ,
Protons having energies up to 3.8 MeV are experimentally generated by the 
-polarized, 45 fs, 
W/cm laser pulse interacting with a near-critical plasma cloud produced by the irradiation of the amplified spontaneous emission (ASE) pedestal at an intensity of 
W/cm onto a 7.5-
m-thick polyimide foil target. A two-dimensional (2D) particle-in-cell (PIC) simulation reveals that the protons are accelerated efficiently when the ion filament is formed inside the plasma channel and the quasistatic magnetic field is generated on the rear side.
Kambe, Shinsaku
no journal, ,
Actinide compounds are 5f-electron systems which show itinerant-localized transition, multipolar ordering, quantum criticality and unconventional superconductivity. These are very important issues in the condensed matter physics. Since the orbital freedom is important in addition to the electron correlation, many unsolved problems remains. On the other hands, NMR is useful method to investigate such problems. In this talk, recent results in this field are presented.