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-orbital symmetry of the ground state in Yb compounds by linear dichroism in core-level photoemissionMori, Takeo*; Kitayama, Satoshi*; Kanai-Nakata, Yuina*; Naimen, Sho*; Fujiwara, Hidenori*; Higashiya, Atsushi*; Tamasaku, Kenji*; Tanaka, Arata*; Terashima, Kensei*; Imada, Shin*; et al.
Journal of the Physical Society of Japan, 83(12), p.123702_1 - 123702_5, 2014/12
Times Cited Count：16 Percentile：66.22(Physics, Multidisciplinary)We show that the strongly correlated 4-orbital symmetry of the ground state is revealed by linear dichroism in core-level photoemission spectra, as we have discovered for YbRh
Si and YbCuSi. Theoretical analysis shows us that the linear dichroism reflects the anisotropic charge distributions resulting from a crystalline electric field. We have successfully determined the ground-state 4 symmetry for both compounds from the polarization-dependent angle resolved core-level spectra at a temperature well below the first excitation energy. The excited-state symmetry is also probed by temperature dependence of the linear dichroism where the high measurement temperatures are on the order of the crystal-field-splitting energies.
Endo, Hitoshi; Tominaga, Taiki; Takata, Shinichi; Matsumoto, Atsushi; Iwase, Hiroki*; Kamikubo, Hironari*; Kataoka, Mikio
no journal, ,
The dynamic and static structure factors for Staphylococcal Nuclease (SNase), which is a nucleolytic enzyme derived from Staphylococcus aureus, were evaluated by neutron spin echo (NSE)and small-angle neutron scattering (SANS) experiments. The SANS experiment was performed with TAIKAN (BL15) time-of-flight diffractometer at J-PARC/MLF, and we could obtain the static structure factors with wide Q range (0.2 
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2). The NSE measurement was performed with IN15 spectrometer at ILL. Grenoble, which enabled us to obtain intermediate scattering functions over 200 nanoseconds. The effects of hydration and internal motions were considered.
Nakasone, Shunya*; Yoshii, Taiki*; Shibuya, Kengo*; Yunoki, Akira*; Sakai, Hirotaka*; Shimada, Taro; Manabe, Seiya*; Matsumoto, Tetsuro*
no journal, ,
Cable has become subject to clearance since the revision of the clearance regulations. Ni-63, a nuclide that is difficult to measure, is produced by the activation of copper in cables. When calculating the amount of Ni-63 produced, the activation cross section in the thermal neutron region differs by a factor of about 6 between nuclear data libraries, so that accurate activation calculations have not been possible. Therefore, the purpose of this study is to improve the accuracy of the calculation of Cu activation and to estimate the reaction cross section of Cu-63(n,p)Ni-63 in the thermal neutron region with good accuracy based on actual measurements. In this presentation, the uncertainty of the thermal neutron fluence contributing to the Cu activation was evaluated using Au-198 after neutron irradiation at JRR-3 in JAEA. High-purity gold and copper samples were placed alternately, and the entire sample was packaged in aluminum foil and sealed in an irradiation capsule, which was placed at the bottom of JRR-3 HR-2 with the capsule lid facing upward. Three irradiation capsules were prepared and irradiated with neutrons for 10, 20, and 30 minutes, respectively. About 50 days after irradiation, the radioactivity was measured using a Ge semiconductor detector. The results showed that the radioactivity per unit mass of gold samples irradiated in each irradiation was the highest in the sample placed at the top of the capsule and decreased by 6
8% toward the bottom of the capsule. This trend is reasonable. The average value of the thermal neutron fluence rate for all samples was 7 
10
cm
s
. These results confirm that the thermal neutron fluence can be determined with an accuracy on the order of percent.
