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6. Bandhead energies inCs125

Author

Sun, Ji, primary, Ma, Ying-Jun, additional, Komatsubara, Tetsuro, additional, Furuno, Kohei, additional, Zhang, Yu-Hu, additional, Zhou, Wen-Ping, additional, Wang, Shou-Yu, additional, Hu, Xue-Yuan, additional, Guo, Hao, additional, Wang, Jia-Qi, additional, and Liu, Yun-Zuo, additional

Published
2016
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7. BANDHEAD ENERGIES IN 125Cs.

Author

Ji Sun, Xue-yuan Hu, Ying-jun Ma, Yun-zuo Liu, Komatsubara Tetsuro, Furuno Kohei, Yu-hu Zhang, Wen-ping Zhou, and Shou-yu Wang

Subjects
VALENCE bands, VALENCE isomers, PROTONS, NEUTRONS, FERMI surfaces
Published
2016

12. Beta decays of 128Ce and 128La.

Author

Hayakawa, Takehito, Komatsubara, Tetsuro, Lu, Jun, Mukai, Junko, and Furuno, Kohei

Abstract

Low-lying states in 57128La and 56128Ba have been investigated by γ-ray spectroscopy after the β decays of 58128Ce and 57128La. For the EC+β+ decay of 128Ce, a new halflife has been determined to be 4.1 ± 0.3 min. In 128La a new β-unstable isomeric state with a halflife shorter than 2 min is suggested in addition to a previously known isomeric state with the halflife of 5.2 min. A tentative level scheme of 128La at low excitation energies has been constructed from the γ−γ coincidence measurement after the β decay of 128Ce. The γ−γ angular correlation for γ rays from 128Ba after the β decay of 128La suggests that the spin-parity assignment of Iπ = 4− or 5+ is preferable for the 2424.9 keV level which is populated via the β decay of the 5.2-min isomeric state with a log ft value of 5.6. For the 2877.1 keV level observed with log ft = 5.8, a preferable spin-parity assignment is 5− or 6+. On the basis of these decay properties and low-lying excited states in neighboring odd mass nuclei, the spins and parities of isomeric states in 128La are proposed to be (1+ or 2+) for the low-spin state, while (5± or 6+) for the high-spin state, within the limit of zero order approximation to the proton-neutron couplings. [ABSTRACT FROM AUTHOR]

Published
1997
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13. Sequential decay in the 12C+16O-->12C+12C+alpha reaction

Author

Furuno, Kohei

Subjects
ComputingMethodologies_DOCUMENTANDTEXTPROCESSING
Abstract

二つの原子核の衝突によってまずその二つの複合した系が生成され，次いでこれがいくつかの原子核に崩壊してゆく。本論文はまず崩壊遇程について詳細にしらべ，崩壊過程の途中にあらわれる原子核の状態を明らかにし，この性質を利用してさかのぼって複合系にメスを入れ得ることを示したものである。そして重イオン入射を用いたことは，従来多く行われてきた軽イオン入射では殆んど解明が困難であった角運動量の大きい状態の関与，容易に把握できることの予見に基ずいている。方法は次のようである。..., 1978

Published
1978

22. Damage to Pelletron acceleration tubes

Author

Seki, Seiji, primary, Ishihara, Toyoyuki, additional, Furuno, Kohei, additional, Tagishi, Yoshihiro, additional, Ishii, Satoshi, additional, Oshima, Hiroyuki, additional, Tajima, Yoshikazu, additional, and Takahashi, Tsutomu, additional

Published
1988
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23. Excited States in124Ba

Author

Furuno, Kohei, primary, Komatsubara, Tetsuro, additional, Hosoda, Takeshi, additional, Sakamoto, Hideo, additional, and Aoki, Takayoshi, additional

Published
1987
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26. Level structure of 154Ho.

Author

Chang-Bum Moon, Komatsubara, Tetsuro, and Furuno, Kohei

Subjects
*HOLMIUM isotopes, *NUCLEAR structure, *EXCITED states, *IN-beam gamma ray spectroscopy, *NUCLEAR reactions
Abstract

The excited states of the odd-odd 154Ho nucleus have been studied by using in-beam y-ray spectroscopy with the 141Pr (16O, 3n) l54Ho reaction at Elab = 75 MeV The beam was provided by the 12UD Pelletron accelerator at the University of Tsukuba. In this work, the complicated decay pattern of low energy transitions just above the T1/2 = 3.10 min isomer have been established. In addition, a number of new states and y-ray transitions, especially those associated with energetically favored band termination, have been observed for the first time in 154Ho. A negative collective band and its signature partner built on the 11- level are interpreted as being based on the πh11/2 ⊗ vi13/2 configuration. A positive band built on the 10+ level is based on the πh11/2 ⊗ vi13/2 configuration while another positive band built on the 9+ level is being associated with the πh11/2 ⊗ Vh9/2 configuration. An energetically favored level Jπ = 19- can be interpreted as being attributed to the πh 11/2 ⊗ vi13/2 configuration coupled to the 8+ state in neighboring core 152Dy, namely, a four-quasiparticle alignment based on the [πh 11/2vi 13/2]11- ⊗[v(h9/2f7/2)]8- configuration. Another energetically favored state at Jπ = 27- is assigned the six-quasiparticle [π(h11/2)³]27/2-⊗[v(f7/2h9/2l13/2)]27/2- configuration. [ABSTRACT FROM AUTHOR]

Published
2013
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