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Journal Articles

Fast nuclear-spin conversion of H$$_{2}$$ trapped and polarized in a CO$$_{2}$$ matrix

Yamakawa, Koichiro; Ishibashi, Atsuki*; Namiyoshi, Toshinobu*; Azuma, Yuichi*; Arakawa, Ichiro*

Physical Review B, 102(4), p.041401_1 - 041401_5, 2020/07

https://doi.org/10.1103/PhysRevB.102.041401
 Times Cited Count：2 Percentile：12.9(Materials Science, Multidisciplinary)

Oral presentation

Isomer spectroscopy using actinide targets

Sugiyama, Koichi*; Go, Shintaro*; Tomimatsu, Taro*; Kai, Tamito*; Nagae, Daisuke*; Ishibashi, Yuichi*; Matsunaga, Sotaro*; Nagata, Yuto*; Nishibata, Hiroki*; Washiyama, Kohei*; et al.

no journal, , 

We have successfully performed in-beam gamma-ray spectroscopy using the isomer-scope technique to study excited-state structure of neutron-rich heavy-actinide nuclei. The neutron-rich heavy-actinide nuclei were produced in the multinucleon-transfer reactions with a $$^{248}$$Cm target and $$^{18}$$O projectiles accelerated with the JAEA tandem accelerator. Projectile-like scattered particles were detected with Si E-$$Delta$$E telescopes placed at the backward angle, and target-like scattered particles of isomers were caught by an annular aluminum plate placed at about 60-mm downstream from the target. Four Ge detectors and 4 LaBr detectors were placed at the periphery of the aluminum plate, and detected gamma rays from the isomers. Gamma rays emitted from the actinide isomers were successfully observed with a good sensitivity owing to the tungsten shield placed between the target and the detectors.

Oral presentation

Response of solar cell as a heavy-ion detector

Asai, Masato; Ishibashi, Yuichi*; Niwase, Toshitaka*; Makii, Hiroyuki; Ito, Yuta; Sato, Tetsuya; Tsukada, Kazuaki; Sakaguchi, Satoshi*; Morita, Kosuke*; Watanabe, Yutaka*; et al.

no journal, , 

Solar cells for power generation can be used as a high-energy heavy-ion detector because it has diode characteristics. To utilize the solar cells for fission-fragment measurements, we have investigated the response (energy resolution and pulse height defect) of a solar cell to heavy ions of various nuclides with several different energies.

Oral presentation

Measurement of mass and total kinetic energy distribution for spontaneous fission of $$^{259}$$Md

Asai, Masato; Ishibashi, Yuichi*; Tsukada, Kazuaki; Sato, Tetsuya; Aoki, Ryota*; Ito, Yuta; Uchibaba, Yuta*; Orlandi, R.; Gong, G.-M.*; Suzaki, Fumi; et al.

no journal, , 

Measurement of mass and total kinetic energy (TKE) distribution for the spontaneous fission (SF) of $$^{259}$$Md has been performed to clarify the fission mechanism in the neutron-rich fermium region. $$^{259}$$Md nuclei were produced with the $$^{254}$$Es target and $$^{18}$$O beam, and mass-separated with an on-line isotope separator (ISOL). We discuss the mechanism of fission observed in the SF of $$^{259}$$Md on the basis of the observed mass-TKE distribution.

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