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Journal Articles

Quasifree neutron knockout from $$^{54}$$Ca corroborates arising $$N=34$$ neutron magic number

Chen, S.*; Lee, J.*; Doornenbal, P.*; Obertelli, A.*; Barbieri, C.*; Chazono, Yoshiki*; Navr$'a$til, P.*; Ogata, Kazuyuki*; Otsuka, Takaharu*; Raimondi, F.*; et al.

Physical Review Letters, 123(14), p.142501_1 - 142501_7, 2019/10

 Times Cited Count:6 Percentile:18.18(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Nuclear moments of the low-lying isomeric $$1^+$$ state of $$^{34}$$Al; Investigation on the neutron $$1p1h$$ excitation across $$N=20$$ in the island of inversion

Xu, Z. Y.*; Heylen, H.*; Asahi, Koichiro*; Boulay, F.*; Daugas, J. M.*; de Groote, R. P.*; Gins, W.*; Kamalou, O.*; Koszor$'u$s, $'A$.*; Lykiardopoupou, M.*; et al.

Physics Letters B, 782, p.619 - 626, 2018/07

 Times Cited Count:1 Percentile:77.87(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Structure of $$^{55}$$Sc and development of the $$N=34$$ subshell closure

Steppenbeck, D.*; Takeuchi, Satoshi*; Aoi, Nori*; Doornenbal, P.*; Matsushita, Masafumi*; Wang, H.*; Baba, Hidetada*; Go, Shintaro*; Holt, J. D.*; Lee, J.*; et al.

Physical Review C, 96(6), p.064310_1 - 064310_10, 2017/12

 Times Cited Count:8 Percentile:24.79(Physics, Nuclear)

no abstracts in English

Journal Articles

Low-$$Z$$ shore of the "island of inversion" and the reduced neutron magicity toward $$^{28}$$O

Doornenbal, P.*; Scheit, H.*; Takeuchi, Satoshi*; Utsuno, Yutaka; Aoi, Nori*; Li, K.*; Matsushita, Masafumi*; Steppenbeck, D.*; Wang, H.*; Baba, Hidetada*; et al.

Physical Review C, 95(4), p.041301_1 - 041301_5, 2017/04

AA2017-0008.pdf:0.46MB

 Times Cited Count:16 Percentile:9.8(Physics, Nuclear)

no abstracts in English

Journal Articles

Intruder configurations in the ground state of $$^{30}$$Ne

Liu, H. N.*; Lee, J.*; Doornenbal, P.*; Scheit, H.*; Takeuchi, Satoshi*; Aoi, Nori*; Li, K. A.*; Matsushita, Masafumi*; Steppenbeck, D.*; Wang, H.*; et al.

Physics Letters B, 767, p.58 - 62, 2017/04

AA2016-0554.pdf:0.67MB

 Times Cited Count:9 Percentile:21.72(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

High-precision quadrupole moment reveals significant intruder component in $$^{33}_{13}$$Al$$_{20}$$ ground state

Heylen, H.*; De Rydt, M.*; Neyens, G.*; Bissell, M. L.*; Caceres, L.*; Chevrier, R.*; Daugas, J. M.*; Ichikawa, Yuichi*; Ishibashi, Yoko*; Kamalou, O.*; et al.

Physical Review C, 94(3), p.034312_1 - 034312_5, 2016/09

AA2016-0115.pdf:0.4MB

 Times Cited Count:26 Percentile:6.76(Physics, Nuclear)

no abstracts in English

Journal Articles

Discovery of new magic number ${it via}$ in-beam $$gamma$$-ray spectroscopy

Takeuchi, Satoshi*; Steppenbeck, D.*; Utsuno, Yutaka

Nippon Butsuri Gakkai-Shi, 70(7), p.535 - 539, 2015/07

no abstracts in English

Journal Articles

Low-lying structure of $$^{50}$$Ar and the $$N$$=32 subshell closure

Steppenbeck, D.*; Takeuchi, Satoshi*; Aoi, Nori*; Doornenbal, P.*; Matsushita, Masafumi*; Wang, H.*; Utsuno, Yutaka; Baba, Hidetada*; Go, Shintaro*; Lee, J.*; et al.

Physical Review Letters, 114(25), p.252501_1 - 252501_6, 2015/06

 Times Cited Count:27 Percentile:13.39(Physics, Multidisciplinary)

The neutron-rich nucleus $$^{50}$$Ar is produced by the fragmentation reactions of $$^{54}$$Ca, $$^{55}$$Sc, and $$^{56}$$Ti at the RIBF facility in RIKEN, and its deexcited $$gamma$$ rays are observed for the first time. The first $$2^+$$ level in $$^{50}$$Ar is identified to lie at 1178(18)keV from the most intense $$gamma$$-ray spectra. This experimental data, together with the systematics of the $$2^+$$ levels for surrounding nuclei, is analyzed with large-scale shell-model calculations. Consequently, the $$N=32$$ sub-shell gap in $$^{50}$$Ar is equivalent to that of $$^{52}$$Ca, thus making the $$2^+$$ level in $$^{50}$$Ar higher than that of $$^{48}$$Ar. The shell-model calculation also predicts that the $$N=34$$ sub-shell gap enhances in going from Ca to Ar, which will be verified by forthcoming experiments for $$^{52}$$Ar.

Journal Articles

Search for neutron excitations across the $$N=20$$ shell gap in $$^{25-29}$$Ne

Belleguic, M.*; Azaiez, F.*; Dombr$'a$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:39 Percentile:9.65(Physics, Nuclear)

no abstracts in English

Journal Articles

Anomalous magnetic moment of $$^9$$C and shell quenching in exotic nuclei

Utsuno, Yutaka

European Physical Journal A, 25(S1), p.209 - 212, 2005/09

 Times Cited Count:2 Percentile:75.31(Physics, Nuclear)

no abstracts in English

Journal Articles

$$^{29}$$Na; Defining the edge of the island of inversion for Z=11

Tripathi, V.*; Tabor, S. L.*; Mantica, P. F.*; Hoffman, C. R.*; Wiedeking, M.*; Davies, A. D.*; Liddick, S. N.*; Mueller, W. F.*; Otsuka, Takaharu*; Stolz, A.*; et al.

Physical Review Letters, 94(16), p.162501_1 - 162501_4, 2005/04

 Times Cited Count:63 Percentile:10.93(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Nuclidic mass formula on a spherical basis with an improved even-odd term

Koura, Hiroyuki; Tachibana, Takahiro*; Uno, Masahiro*; Yamada, Masami*

Progress of Theoretical Physics, 113(2), p.305 - 325, 2005/02

 Times Cited Count:297 Percentile:1.12(Physics, Multidisciplinary)

A nuclidic mass formula composed of a gross term, an even-odd term and a shell term is presented as a revised version of the mass formula constructed by the present authors and published in 2000. The gross term has almost the same functional form as in the previous formula, but the parameter values in it are somewhat different. The even-odd term is treated more carefully, and a considerable improvement is brought about. The shell term is exactly the same as the previous one; it was obtained using spherical single-particle potentials and by treating the deformed nucleus as a superposition of spherical nuclei. The new mass formula is applicable to nuclei with ${it Z}$ $$>$$ 1 and ${it N}$ $$>$$ 1. The root-mean-square deviation from experimental masses is 0.658 MeV, which is less than that of the previous mass formula, 0.680 MeV.

Journal Articles

Measurement of the spin and magnetic moment of $$^{31}$$Mg; Evidence for a strongly deformed intruder ground state

Neyens, G.*; Kowalska, M.*; Yordanov, D.*; Blaum, K.*; Himpe, P.*; Lievens, P.*; Mallion, S.*; Neugart, R.*; Vermeulen, N.*; Utsuno, Yutaka; et al.

Physical Review Letters, 94(2), p.022501_1 - 022501_4, 2005/01

 Times Cited Count:142 Percentile:3.78(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Onset of intruder ground state in exotic Na isotopes and evolution of the $$N=20$$ shell gap

Utsuno, Yutaka; Otsuka, Takaharu*; Glasmacher, T.*; Mizusaki, Takahiro*; Homma, Michio*

Physical Review C, 70(4), p.044307_1 - 044307_8, 2004/10

A2004-0200.pdf:0.17MB

 Times Cited Count:136 Percentile:1.76(Physics, Nuclear)

We perform systematic calculations of nuclear moments and energy levels in neutron-rich Na isotopes with the Monte Carlo shell model by adopting a large model space consisting of the full $$sd$$ and part of the $$pf$$ orbits. The calculation well reproduces those observables. The result shows that the disappearance of the $$N=20$$ magic number starts already at $$N=18$$ and that the magicity completely disappears for the $$N=19$$ isotone $$^{30}$$Na. This is in sharp contrast to previous consensus that the magic number disappears at $$N=20$$ and beyond. This early onset of disappearance indicates that the $$N=20$$ shell gap considerably narrows in Na isotopes compared to stable nuclei near $$^{40}$$Ca.

Journal Articles

Anomalous magnetic moment of $$^9$$C and shell quenching in exotic nuclei

Utsuno, Yutaka

Physical Review C, 70(1), p.011303_1 - 011303_5, 2004/07

A2003-0610.pdf:0.12MB

 Times Cited Count:15 Percentile:32.35(Physics, Nuclear)

no abstracts in English

Journal Articles

Primary fragment mass-yield distributions for asymmetric fission path of heavy nuclei

Zhao, Y. L.*; Nishinaka, Ichiro; Nagame, Yuichiro; Tsukada, Kazuaki; Sueki, Keisuke*; Goto, Shinichi*; Tanikawa, Masashi*; Nakahara, Hiromichi*

Journal of Radioanalytical and Nuclear Chemistry, 255(1), p.67 - 72, 2003/01

 Times Cited Count:2 Percentile:79.94

no abstracts in English

Journal Articles

Structure of ${it N}$$$sim$$20 unstable nuclei studied by the Monte Carlo shell model

Utsuno, Yutaka; Otsuka, Takaharu*; Mizusaki, Takahiro*; Homma, Michio*

JAERI-Conf 2001-012, p.103 - 106, 2001/09

no abstracts in English

Journal Articles

Magic numbers in exotic nuclei and spin-isospin properties of $$NN$$ interaction

Otsuka, Takaharu*; Fujimoto, Rintaro*; Utsuno, Yutaka; Brown, B. A.*; Homma, Michio*; Mizusaki, Takahiro*

Physical Review Letters, 87(8), p.082502_1 - 082502_4, 2001/08

A2001-0048.pdf:0.15MB

 Times Cited Count:578 Percentile:0.53(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Extreme location of F drip line and disappearance of the $$N$$=20 magic structure

Utsuno, Yutaka; Otsuka, Takaharu*; Mizusaki, Takahiro*; Homma, Michio*

Physical Review C, 64(1), p.011301_1 - 011301_5, 2001/07

A2001-0071.pdf:0.13MB

 Times Cited Count:100 Percentile:3.3(Physics, Nuclear)

no abstracts in English

Journal Articles

Exotic nuclei in the Monte Carlo shell model calculations

Otsuka, Takaharu*; Utsuno, Yutaka; Mizusaki, Takahiro*; Homma, Michio*

Nuclear Physics A, 685(1-4), p.100c - 114c, 2001/03

no abstracts in English

26 (Records 1-20 displayed on this page)