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Ba and high-spin structure of 
BaKaya, L.*; Vogt, A.*; Reiter, P.*; Siciliano, M.*; Shimizu, Noritaka*; Utsuno, Yutaka; Wang, H.-K.*; Gargano, A.*; Coraggio, L.*; Itaco, N.*; et al.
Physical Review C, 100(2), p.024323_1 - 024323_18, 2019/08
Times Cited Count：12 Percentile：76.6(Physics, Nuclear)no abstracts in English
At revealed by in-source laser spectroscopyBarzakh, A. E.*; Cubiss, J. G.*; Andreyev, A. N.; Seliverstov, M. D.*; Andel, B.*; Antalic, S.*; Ascher, P.*; Atanasov, D.*; Beck, D.*; Biero
, J.*; et al.
Physical Review C, 99(5), p.054317_1 - 054317_9, 2019/05
Times Cited Count：12 Percentile：76.6(Physics, Nuclear)Asai, Masato
Radioisotopes, 67(6), p.291 - 298, 2018/06
Stability and limit of existence essentially depend on nuclear shell structure. It is theoretically predicted that stable doubly-closed-shell spherical superheavy nuclei should exist around the region of the proton number 114 to 126 and the neutron number 172 to 184, although their locations and degree of stability have not been established because of large variety of theoretical predictions. On the other hand, recent advances on experimental techniques have made it possible to accumulate experimental data concerning the shell structure of superheavy nuclei, such as half-lives and nuclear masses. In addition, some pioneering experiments have been performed to directly establish the level structure of superheavy nuclei through spectroscopic methods. This paper introduces the current status of experimental studies on nuclear shell structure of superheavy nuclei.
-ray spectroscopy of hypernuclei; Recent results and prospect at J-PARCTamura, Hirokazu*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; et al.
JPS Conference Proceedings (Internet), 17, p.011004_1 - 011004_11, 2017/07
shell gap in 
NeBelleguic, M.*; Azaiez, F.*; Dombr
di, Zs.*; Sohler, D.*; Lopez-Jimenez, M. J.*; Otsuka, Takaharu*; Saint-Laurent, M. G.*; Sorlin, O.*; Stanoiu, C.*; Utsuno, Yutaka; et al.
Physical Review C, 72(5), p.054316_1 - 054316_7, 2005/11
Times Cited Count：41 Percentile：89.52(Physics, Nuclear)no abstracts in English
isomer in neutron-rich 
WShizuma, Toshiyuki; Hayakawa, Takehito; Mitarai, Shiro*; Morikawa, Tsuneyasu*; Ishii, Tetsuro
Physical Review C, 71(6), p.067301_1 - 067301_4, 2005/06
Times Cited Count：6 Percentile：45.52(Physics, Nuclear)Excited states in neutron-rich W have been populated via deep inelastic collisions of a 630-MeV 
Se beam on a 
W target. Projectile-like fragments were measured by an annular Si detector for reaction channel selection. Delayed rays from target residues were detected by means of the so-called recoil shadow technique. A new isomer at 411 keV, based on the 
[615] Nilsson configuration, has been identified with the half-life of 1.56(28) 
s. The decay rates of the isomers are discussed in terms of the 
quantum number by comparison with the systematics from the neighboring nuclei.
Ba populated by deep inelastic collisionsShizuma, Toshiyuki; Gan, Z. G.*; Ogawa, Kengo*; Nakada, Hitoshi*; Oshima, Masumi; Toh, Yosuke; Hayakawa, Takehito; Hatsukawa, Yuichi; Sugawara, Masahiko*; Utsuno, Yutaka; et al.
European Physical Journal A, 20(2), p.207 - 210, 2004/04
Times Cited Count：13 Percentile：71.74(Physics, Nuclear)Excited states in Ba, populated in deep-inelastic collisions by the interaction of 450-MeV Se ions with a 
La target, have been studied by means of in-beam -ray spectroscopy. A new isomer with 
has been identified at an excitation energy of 
MeV. The half-life was determined as 
ns. The extracted 
value is much smaller than those in 
Te and Xe. This hindrance is investigated by a shell model calculation.
OsShizuma, Toshiyuki; Mitarai, Shiro*; Sletten, G.*; Bark, R. A.*; Gjorup, N. L.*; Jensen, H. J.*; Piiparinen, M.*; Wrzesinski, J.*; Shimizu, Yoshifumi*
Physical Review C, 69(2), p.024305_1 - 024305_18, 2004/02
Times Cited Count：15 Percentile：65.29(Physics, Nuclear)High-spin states in Os have been studied using the 
Yb(
C,4n) reaction at a beam energy of 65MeV. Previously known 1-quasiparticle bands have been extended to higher spins. New high- bands based on 3- and 5-quasiparticle excitation have been identified. Nilsson configurations are assigned based on the g-factors deduced from M1/E2 branching ratios within the bands. In addition, a new isomer at 5008keV has been found with a half-life of 18(2) ns. The hindrance in decays of the high- intrinsic states are discussed in terms of the tunneling model where the low- and high- states interact through the triaxial shape fluctuation.
DyHayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Matsuda, Makoto; Hatsukawa, Yuichi; Shizuma, Toshiyuki; Katakura, Junichi; Iimura, Hideki; Mitarai, Shiro*; Zhang, Y.*; et al.
Physical Review C, 68(6), p.067303_1 - 067303_4, 2003/12
Times Cited Count：2 Percentile：21.23(Physics, Nuclear)no abstracts in English
ReShizuma, Toshiyuki; Toh, Yosuke; Oshima, Masumi; Sugawara, Masahiko*; Matsuda, Makoto; Hayakawa, Takehito; Koizumi, Mitsuo; Osa, Akihiko; Zhang, Y. H.*; Liu, Z.*
European Physical Journal A, 17(2), p.159 - 165, 2003/06
Times Cited Count：10 Percentile：55.54(Physics, Nuclear)High-spin states in Re populated by inelastic scattering of a 500-MeV Se beam have been studied by means of in-beam -ray spectroscopy. Levels built on the 
[402] and 
[514] one-quasiparticle states were measured up to 
and 
, respectively. In additions, several new levels including an isomer at 1682 keV with a half-life of 114(23) ns have been found. Quasiparticle configurations of the levels and the transition rates are discussed.
SeHayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Osa, Akihiko; Koizumi, Mitsuo; Hatsukawa, Yuichi; Utsuno, Yutaka; Katakura, Junichi; Matsuda, Makoto; Morikawa, Tsuneyasu*; et al.
Physical Review C, 67(6), p.064310_1 - 064310_6, 2003/06
Times Cited Count：17 Percentile：69.83(Physics, Nuclear)no abstracts in English
GdHayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Matsuda, Makoto; Hatsukawa, Yuichi; Shinohara, Nobuo; Iimura, Hideki; Shizuma, Toshiyuki; Zhang, Y.*; Sugawara, Masahiko*; et al.
Physics Letters B, 551(1-2), p.79 - 85, 2003/01
Times Cited Count：10 Percentile：55.54(Astronomy & Astrophysics)no abstracts in English
band in DyHayakawa, Takehito; Toh, Yosuke; Oshima, Masumi; Matsuda, Makoto; Hatsukawa, Yuichi; Katakura, Junichi; Iimura, Hideki; Shizuma, Toshiyuki; Mitarai, Shiro*; Sugawara, Masahiko*; et al.
European Physical Journal A, 15(3), p.299 - 302, 2002/11
Times Cited Count：9 Percentile：47.97(Physics, Nuclear)no abstracts in English
negative parity states in 
OsShizuma, Toshiyuki; Stevenson, P. D.*; Walker, P. M.*; Toh, Yosuke; Hayakawa, Takehito; Oshima, Masumi; Furuno, Kohei*; Komatsubara, Tetsuro*
Physical Review C, 65(6), p.064310_1 - 064310_12, 2002/06
Times Cited Count：15 Percentile：62.86(Physics, Nuclear)High-spin states in Os have been studied using the 
Er(
O,4n) reaction at a beam energy of 85 MeV. Several new negative parity levels including a 48-ns 
isomer have been identified. Nilsson configurations for the levels are assigned by comparison with multi-quasiparticle calculations. Potential-energy-surface calculations show an increasing influence of triaxiality in nuclear shapes at higher spins. The decay rate of the isomer is discussed in relation to the role of the quantum number.
-forbidden transitions in 
OsShizuma, Toshiyuki; Matsuura, Katsuyuki*; Toh, Yosuke; Hayakawa, Takehito; Oshima, Masumi; Hatsukawa, Yuichi; Matsuda, Makoto; Furuno, Kohei*; Sasaki, Yasuyuki*; Komatsubara, Tetsuro*; et al.
Nuclear Physics A, 696(3-4), p.337 - 370, 2001/12
Times Cited Count：20 Percentile：73.8(Physics, Nuclear)High-spin states in Os have been studied using the 170Er(18O,5n) reaction at a beam energy of 85 MeV. Nine rotational bands based on 1-, 3-, 5- and 7-quasiparticle excitations have been observed. Nilsson configurations are assigned for the newly observed bands using g-factors deduced from M1/E2 branching ratios within the bands. In addition, two isomers with K=(43/2+) and (43/2-) have been identified. The K=(43/2+) isomer decays directly to the K=9/2+ ground state band with a large difference in the quantum number, 
17. The decay rates are disccused in terms of a tunneling model where high- (isomeric) and low- states interact via fluctuations towards triaxial nuclear shapes.
Hayakawa, Takehito; Oshima, Masumi; Hatsukawa, Yuichi; Katakura, Junichi; Iimura, Hideki; Matsuda, Makoto; Shinohara, Nobuo; Toh, Yosuke; Mitarai, Shiro*; Shizuma, Toshiyuki; et al.
European Physical Journal A, 9(2), p.153 - 156, 2000/10
Times Cited Count：17 Percentile：66.11(Physics, Nuclear)no abstracts in English
Asai, Masato; Sakama, Minoru*; Tsukada, Kazuaki; Ichikawa, Shinichi; Haba, Hiromitsu; Nishinaka, Ichiro; Nagame, Yuichiro; Goto, Shinichi*; Kojima, Yasuaki*; Oura, Yasuji*; et al.
AIP Conference Proceedings 561, p.358 - 367, 2000/09
no abstracts in English
Iwamoto, Akira; Yoshida, Tadashi; Takeuchi, Suehiro
JAERI-Conf 99-013, p.234 - 0, 2000/01
no abstracts in English
GdHayakawa, Takehito; Oshima, Masumi; Hatsukawa, Yuichi; Katakura, Junichi; Iimura, Hideki; Matsuda, Makoto; Mitarashi, Shiro*; Shimizu, Y.*; Otsubo, Shinichi*; Shizuma, Toshiyuki; et al.
AIP Conference Proceedings 495, p.235 - 236, 1999/12
no abstracts in English
GdHayakawa, Takehito; Oshima, Masumi; Hatsukawa, Yuichi; Katakura, Junichi; Iimura, Hideki; Matsuda, Makoto; Mitarashi, Shiro*; Shimizu, Y.*; Otsubo, Shinichi*; Shizuma, Toshiyuki; et al.
Nuclear Physics A, 657(1), p.3 - 18, 1999/00
Times Cited Count：19 Percentile：70.5(Physics, Nuclear)no abstracts in English
