Negatively charged muonium and related centers in solids

Ito, Takashi; Higemoto, Wataru; Shimomura, Koichiro*

Journal of the Physical Society of Japan, 89(5), p.051007_1 - 051007_8, 2020/05

https://doi.org/10.7566/JPSJ.89.051007

Coexistence of superconductivity with quadrupole order in a system

Kubo, Katsunori

JPS Conference Proceedings (Internet), 30, p.011041_1 - 011041_6, 2020/03

https://doi.org/10.7566/JPSCP.30.011041

Restoration of the natural energy splitting in odd-K isotopes towards

Sun, Y. L.*; Obertelli, A.*; Doornenbal, P.*; Barbieri, C.*; Chazono, Yoshiki*; Duguet, T.*; Liu, H. N.*; Navrtil, P.*; Nowacki, F.*; Ogata, Kazuyuki*; et al.

Physics Letters B, 802, p.135215_1 - 135215_7, 2020/03

https://doi.org/10.1016/j.physletb.2020.135215

no abstracts in English

Structure of superconducting Ca-intercalated bilayer Graphene/SiC studied using total-reflection high-energy positron diffraction

Endo, Yukihiro*; Fukaya, Yuki; Mochizuki, Izumi*; Takayama, Akari*; Hyodo, Toshio*; Hasegawa, Shuji*

Carbon, 157, p.857 - 862, 2020/02

https://doi.org/10.1016/j.carbon.2019.10.070

no abstracts in English

Heavy fermion state of YbNiSi without local inversion symmetry

Nakamura, Shota*; Hyodo, Kazushi*; Matsumoto, Yuji*; Haga, Yoshinori; Sato, Hitoshi*; Ueda, Shigenori*; Mimura, Kojiro*; Saiki, Katsuyoshi*; Iso, Kosei*; Yamashita, Minoru*; et al.

Journal of the Physical Society of Japan, 89(2), p.024705_1 - 024705_5, 2020/02

https://doi.org/10.7566/JPSJ.89.024705

Sequestration and oxidation of Cr(III) by fungal Mn oxides with Mn(II) oxidizing activity

Suzuki, Ryohei*; Tani, Yukinori*; Naito, Hirotaka*; Miyata, Naoyuki*; Tanaka, Kazuya

Catalysts, 10(1), p.44_1 - 44_15, 2020/01

https://doi.org/10.3390/catal10010044

We prepared biogenic Mn oxides (BMOs) using strain KR21-2, and subsequently conducted single or repeated treatment experiments in Cr(NO) at pH6.0. Under aerobic conditions, newly formed BMOs exhibited a rapid production of Cr(VI) without a significant release of Mn(II), demonstrating that newly formed BMO mediates a catalytic oxidation of Cr(III) with a self-regeneration step of reduced Mn. In anaerobic solution, newly formed BMOs showed a cessation of Cr(III) oxidation in the early stage of the reaction, and subsequently had a much smaller Cr(VI) production with significant release of reduced Mn(II).

Shell evolution of = 40 isotones towards Ca: First spectroscopy of Ti

Corts, M. L.*; Rodriguez, W.*; Doornenbal, P.*; Obertelli, A.*; Holt, J. D.*; Lenzi, S. M.*; Menndez, J.*; Nowacki, F.*; Ogata, Kazuyuki*; Poves, A.*; et al.

Physics Letters B, 800, p.135071_1 - 135071_7, 2020/01

https://doi.org/10.1016/j.physletb.2019.135071

Excited states in the = 40 isotone Ti were populated via the V(,)Ti reaction at 200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using -ray spectroscopy. The energies of the and transitions, observed here for the first time, indicate a deformed Ti ground state. These energies are increased compared to the neighboring Cr and Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings.

Adsorption mechanism of ReO on Ni-Zn layered hydroxide salt and its application to removal of ReO as a surrogate of TcO

Tanaka, Kazuya; Kozai, Naofumi; Yamasaki, Shinya*; Onuki, Toshihiko; Kaplan, D. I.*; Grambow, B.

Applied Clay Science, 182, p.105282_1 - 105282_8, 2019/12

https://doi.org/10.1016/j.clay.2019.105282

In this study, Ni-Zn layered hydroxide salt (LHS) was used for adsorption experiments of ReO, as a surrogate of TcO, in aqueous solutions with various initial Re and sodium salt concentrations. The maximum adsorption amount of Re was estimated at 127.7 mg/g (6.86 10 eq/g) by fitting adsorption isotherm of ReO to Langmuir plot. The adsorption of ReO at neutral pH was a reversible process by anion exchange, and decreased with increasing Cl, NO and SO in solution. EXAFS analysis indicated that ReO was adsorbed as an outer-sphere complex on Ni-Zn LHS. The Ni-Zn LHS is a more robust adsorbent for ReO than the Mg-Al LDH in terms of solution pH and tolerance to competing anions, and may be an effective alternative to the traditional and more limited method of removing aqueous TcO by reductive precipitation.

Toward a reliable description of (,) reactions in the distorted-wave impulse approximation

Phuc, N. T. T.*; Yoshida, Kazuki; Ogata, Kazuyuki*

Physical Review C, 100(6), p.064604_1 - 064604_8, 2019/12

https://doi.org/10.1103/PhysRevC.100.064604

Our goal is to investigate the effects of various corrections and uncertainties within the standard distorted-wave impulse approximation (DIWA) formalism on the (,) cross sections. We analyze the (,) and (,) reactions data measured at the R3B/LAND setup at GSI for carbon, nitrogen and oxygen isotopes in the incident energy range of 300-450 MeV/u. Cross sections and reduction factors are calculated by the DWIA method. We have found that including the nonlocality corrections and Mller factor affects the cross sections considerably. The proton-neutron asymmetry dependence of reduction factors extracted by the DWIA calculation is very weak and consistent with those given by other reaction methods and ab initio structure calculations. They also suggest that some higher-order effects, which is essential for an accurate cross section description at large recoil momentum, is missing in the current DWIA and other reaction models.

Polaronic nature of a muonium-related paramagnetic center in SrTiO

Ito, Takashi; Higemoto, Wataru; Koda, Akihiro*; Shimomura, Koichiro*

Applied Physics Letters, 115(19), p.192103_1 - 192103_4, 2019/11

https://doi.org/10.1063/1.5125919