Estimated isotopic compositions of Yb in enriched Yb for producing Lu with high radionuclide purity by Yb()Lu

Nagai, Yasuki*; Kawabata, Masako*; Hashimoto, Shintaro; Tsukada, Kazuaki; Hashimoto, Kazuyuki*; Motoishi, Shoji*; Saeki, Hideya*; Motomura, Arata*; Minato, Futoshi; Ito, Masatoshi*

Journal of the Physical Society of Japan, 91(4), p.044201_1 - 044201_10, 2022/04

https://doi.org/10.7566/JPSJ.91.044201

Recently, Lu is considered as one of the most important medical RIs for treating neuroendocrine tumors. A plan to produce Lu with high purity by using enriched Yb samples with irradiation of deuteron beams in accelerators has been discussed. However, since the other Yb isotopes contained in the Yb sample interacts with deuterons, Lu isotopes other than Lu are produced as impurities. Since the purity of Lu is important for medical use, a method to evaluate the impurity of Lu has been required. In this study, we proposed a new method to estimate production yields of each Lu isotopes in Yb samples with arbitrary isotopic compositions by using excitation functions of Yb()Lu reactions and the particle transport calculation code PHITS. The method plays an important role in discussing the isotopic composition of enriched samples to produce high-purity Lu using accelerators.

Local structure study of the iron-based systems of BaFeAs and LiFeAs by X-ray PDF and XAFS analyses

Li, S.*; Toyoda, Masayuki*; Kobayashi, Yoshiaki*; Ito, Masayuki*; Ikeuchi, Kazuhiko*; Yoneda, Yasuhiro; Otani, Akira*; Matsumura, Daiju; Asano, Shun*; Mizuki, Junichiro*; et al.

Physica C, 555, p.45 - 53, 2018/12

https://doi.org/10.1016/j.physc.2018.10.003

-dependence of local distortions in BaFeAs and LiFeAs by X-ray PDF and XAFS methods. Although PDF data exhibit anomaly at the structure transition temperature, EXAFS data exhibit no anomaly. Data supporting the local orthorhombicity at 300 K in the tetragonal phase for BaFeAs. Arguments on the origins of the 4-fold symmetry breaking in the ground average structure of the tetragonal phase.

Mo yield using large sample mass of MoO for sustainable production of Mo

Tsukada, Kazuaki; Nagai, Yasuki*; Hashimoto, Kazuyuki*; Kawabata, Masako*; Minato, Futoshi; Saeki, Hideya*; Motoishi, Shoji*; Ito, Masatoshi*

Journal of the Physical Society of Japan, 87(4), p.043201_1 - 043201_5, 2018/04

https://doi.org/10.7566/JPSJ.87.043201

Phonons of Fe-based superconductor CaPtAs(FePtAs)

Ikeuchi, Kazuhiko*; Kobayashi, Yoshiaki*; Suzukia, Kazunori*; Ito, Masayuki*; Kajimoto, Ryoichi; Bourges, P.*; Christianson, A. D.*; Nakamura, Hiroki; Machida, Masahiko; Sato, Masatoshi*

Journal of Physics; Condensed Matter, 27(46), p.465701_1 - 465701_7, 2015/11

https://doi.org/10.1088/0953-8984/27/46/465701

We report the results of inelastic neutron scattering measurements on particular phonons of a superconducting (SC) CaPtAs(FePtAs) with the onset transition temperature K to investigate mainly what roles orbital fluctuation plays in Cooper pairing, where we observed a slight softening of the in-plane transverse acoustic mode corresponding to the elastic constant . This softening starts at temperature well above the SC , as decreases. An anomalously strong change of the scattering intensity of in-plane optical modes was observed at the M point of the pseudo tetragonal reciprocal space in the range of 35 40 meV with decreasing from far above . Because this region mainly corresponds to the motion of Fe and As atoms in the FeAs planes, the finding presents information on the coupling between the orbital fluctuation of Fe electrons and the lattice system, useful for studying the possible roles of orbital fluctuation in the pairing mechanism and/or the appearance of the so-called nematic phase.

Magnetic structures and spin states of NdBaCoO

Soda, Minoru*; Yasui, Yukio*; Ito, Masafumi*; Iikubo, Satoshi*; Sato, Masatoshi*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 73(2), p.464 - 468, 2004/02

https://doi.org/10.1143/JPSJ.73.464

no abstracts in English

Polarization transfer in the O() reaction at forward angles and structure of the spin-dipole resonances

Kawabata, Takahiro*; Ishikawa, Takatsugu*; Ito, M.*; Nakamura, M.*; Sakaguchi, Harutaka*; Takeda, H.*; Taki, T.*; Uchida, Makoto*; Yasuda, Yusuke*; Yosoi, Masaru*; et al.

Physical Review C, 65(6), p.064316_1 - 064316_12, 2002/06

https://doi.org/10.1103/PhysRevC.65.064316

no abstracts in English

Study of giant monopole resonance in Ni via the (, ') reaction at 0

Ishikawa, Takatsugu*; Akimune, Hidetoshi*; Daito, Izuru*; Fujimura, Hisako*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Hatanaka, Kichiji*; Hosono, K.*; Ihara, F.*; Ito, M.*; et al.

Nuclear Physics A, 187(1-2), p.58c - 63c, 2001/04

no abstracts in English

Thin ice target for O (p,p') experiment

Kawabata, Takahiro*; Akimune, Hidetoshi*; Fujimura, Hisako*; Fujita, Hirohiko*; Fujita, Yoshitaka*; Fujiwara, Mamoru; Hara, Keigo*; Hatanaka, Kichiji*; Hosono, K.*; Ishikawa, Takatsugu*; et al.

Nuclear Instruments and Methods in Physics Research A, 459(1-2), p.171 - 176, 2001/02

https://doi.org/10.1016/S0168-9002(00)00992-X

no abstracts in English

Data on the Deep Basaltic Rocks in the Green Tuff Region of Northeast Japan

Ito, Masatoshi*

JNC TJ7440 2005-024, 156 Pages, 1992/03

JNC-TJ7440-2005-024.pdf:7.86MB

This paper presents the data obtained from a 322.6 meters deep drill hole in Green Tuff Region of Northeast Japan.

Establishment of a new detection system for measuring primary knock-on atoms and fission fragments

Tsai, P.-E.; Iwamoto, Yosuke; Hagiwara, Masayuki*; Sato, Tatsuhiko; Satoh, Daiki; Ito, Masatoshi*; Watabe, Hiroshi*

no journal, , 

A new detection system has been designed and constructed dedicating for the measurements of primary knock-on atoms and fission fragments, whose cross sections are critical in the design of accelerator driven systems. The detection system consists of two fast timing detectors and one dE-E energy detector. The particle species are identified by two relationships: the time-of-flight (ToF) vs E and dE vs E, and then the kinetic energy of the identified particles can be derived from the ToF. The PHITS Monte Carlo simulation code was employed for designing detectors and estimating the performance of the detection system. The new detection system will be tested at the JAEA Tandem Facility and the Cyclotron and Radioisotope Center (CYRIC) at the Tohoku University in 2017. The preliminary test results along with the PHITS simulations will be presented at the Workshop.