JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-20 displayed on this page of 27

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Shape transition of Nd and Sm isotopes and the neutrinoless double-$$beta$$-decay nuclear matrix element of $$^{150}$$Nd

Tsunoda, Yusuke*; Shimizu, Noritaka*; Otsuka, Takaharu*

Physical Review C, 108(2), p.L021302_1 - L021302_6, 2023/08

https://doi.org/10.1103/PhysRevC.108.L021302
 Times Cited Count：0 Percentile：0.00(Physics, Nuclear)

no abstracts in English

Journal Articles

Level structures of $$^{56,58}$$Ca cast doubt on a doubly magic $$^{60}$$Ca

Chen, S.*; Browne, F.*; Doornenbal, P.*; Lee, J.*; Obertelli, A.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Chazono, Yoshiki*; Hagen, G.*; Holt, J. D.*; et al.

Physics Letters B, 843, p.138025_1 - 138025_7, 2023/08

https://doi.org/10.1016/j.physletb.2023.138025
 Times Cited Count：7 Percentile：83.07(Astronomy & Astrophysics)

Gamma decays were observed in $$^{56}$$Ca and $$^{58}$$Ca following quasi-free one-proton knockout reactions from $$^{57,59}$$Sc. For $$^{56}$$Ca, a $$gamma$$ ray transition was measured to be 1456(12) keV, while for $$^{58}$$Ca an indication for a transition was observed at 1115(34) keV. Both transitions were tentatively assigned as the $$2^{+}_{1} rightarrow 0^{+}_{gs}$$ decays. A shell-model calculation in a wide model space with a marginally modified effective nucleon-nucleon interaction depicts excellent agreement with experiment for $$2^{+}_{1}$$ level energies, two-neutron separation energies, and reaction cross sections, corroborating the formation of a new nuclear shell above the N = 34 shell. Its constituents, the $$0_{f5/2}$$ and $$0_{g9/2}$$ orbitals, are almost degenerate. This degeneracy precludes the possibility for a doubly magic $$^{60}$$Ca and potentially drives the dripline of Ca isotopes to $$^{70}$$Ca or even beyond.

Journal Articles

First spectroscopic study of odd-odd $$^{78}$$Cu

Pedersen, L. G.*; Sahin, E.*; G$"o$rgen, A.*; Bello Garrote, F. L.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Niikura, Megumi*; Orlandi, R.; 59 of others*

Physical Review C, 107(4), p.044301_1 - 044301_10, 2023/04

https://doi.org/10.1103/PhysRevC.107.044301
 Times Cited Count：2 Percentile：28.72(Physics, Nuclear)

Journal Articles

Study of the $$N=32$$ and $$N=34$$ shell gap for Ti and V by the first high-precision multireflection time-of-flight mass measurements at BigRIPS-SLOWRI

Iimura, Shun*; Rosenbusch, M.*; Takamine, Aiko*; Tsunoda, Yusuke*; Wada, Michiharu*; Chen, S.*; Hou, D. S.*; Xian, W.*; Ishiyama, Hironobu*; Yan, S.*; et al.

Physical Review Letters, 130(1), p.012501_1 - 012501_6, 2023/01

https://doi.org/10.1103/PhysRevLett.130.012501
 Times Cited Count：12 Percentile：89.17(Physics, Multidisciplinary)

Journal Articles

$$alpha$$-clustering in atomic nuclei from first principles with statistical learning and the Hoyle state character

Otsuka, Takaharu; Abe, Takashi*; Yoshida, Toru*; Tsunoda, Yusuke*; Shimizu, Noritaka*; Itagaki, Naoyuki*; Utsuno, Yutaka; Vary, J. P.*; Maris, P.*; Ueno, Hideki*

Nature Communications (Internet), 13, p.2234_1 - 2234_10, 2022/04

AA2021-0861.pdf:3.07MB

https://doi.org/10.1038/s41467-022-29582-0
 Times Cited Count：42 Percentile：96.97(Multidisciplinary Sciences)

no abstracts in English

Journal Articles

Moments and radii of exotic Na and Mg isotopes

Otsuka, Takaharu*; Shimizu, Noritaka*; Tsunoda, Yusuke*

Physical Review C, 105(1), p.014319_1 - 014319_8, 2022/01

https://doi.org/10.1103/PhysRevC.105.014319
 Times Cited Count：6 Percentile：68.58(Physics, Nuclear)

no abstracts in English

Journal Articles

Lifetime measurements of excited states in $$^{55}$$Cr

Kleis, H.*; Seidlitz, M.*; Blazhev, A.*; Kaya, L.*; Reiter, P.*; Arnswald, K.*; Dewald, A.*; Droste, M.*; Fransen, C.*; M$"o$ller, O.*; et al.

Physical Review C, 104(3), p.034310_1 - 034310_9, 2021/09

AA2021-0426.pdf:0.73MB

https://doi.org/10.1103/PhysRevC.104.034310
 Times Cited Count：4 Percentile：44.74(Physics, Nuclear)

no abstracts in English

Journal Articles

Variational approach with the superposition of the symmetry-restored quasiparticle vacua for nuclear shell-model calculations

Shimizu, Noritaka*; Tsunoda, Yusuke*; Utsuno, Yutaka; Otsuka, Takaharu*

Physical Review C, 103(1), p.014312_1 - 014312_11, 2021/01

AA2020-0764.pdf:0.89MB

https://doi.org/10.1103/PhysRevC.103.014312
 Times Cited Count：24 Percentile：92.32(Physics, Nuclear)

no abstracts in English

Journal Articles

$$beta$$ decay of $$^{75}$$Ni and the systematics of the low-lying level structure of neutron-rich odd-$$A$$ Cu isotopes

Bello Garrote, F. L.*; Sahin, E.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; G$"o$rgen, A.*; Orlandi, R.; 61 of others*

Physical Review C, 102(3), p.034314_1 - 034314_13, 2020/09

https://doi.org/10.1103/PhysRevC.102.034314
 Times Cited Count：4 Percentile：37.63(Physics, Nuclear)

Journal Articles

Thick-restart block Lanczos method for large-scale shell-model calculations

Shimizu, Noritaka*; Mizusaki, Takahiro*; Utsuno, Yutaka; Tsunoda, Yusuke*

Computer Physics Communications, 244, p.372 - 384, 2019/11

https://doi.org/10.1016/j.cpc.2019.06.011
 Times Cited Count：252 Percentile：99.88(Computer Science, Interdisciplinary Applications)

no abstracts in English

Journal Articles

Shape staggering of midshell mercury isotopes from in-source laser spectroscopy compared with density-functional-theory and Monte Carlo shell-model calculations

Sels, S.*; Day Goodacre, T.*; Marsh, B. A.*; Pastore, A.*; Ryssens, W.*; Tsunoda, Yusuke*; Althubiti, N.*; Andel, B.*; Andreyev, A. N.; 39 of others*

Physical Review C, 99(4), p.044306_1 - 044306_17, 2019/04

https://doi.org/10.1103/PhysRevC.99.044306
 Times Cited Count：46 Percentile：96.25(Physics, Nuclear)

Journal Articles

Characterization of the shape-staggering effect in mercury nuclei

Marsh, B. A.*; Day Goodacre, T.*; Tsunoda, Yusuke*; Andreyev, A. N.; 41 of others*

Nature Physics, 14(12), p.1163 - 1167, 2018/12

https://doi.org/10.1038/s41567-018-0292-8
 Times Cited Count：116 Percentile：96.96(Physics, Multidisciplinary)

Journal Articles

Monte Carlo shell model studies with massively parallel supercomputers

Shimizu, Noritaka*; Abe, Takashi*; Homma, Michio*; Otsuka, Takaharu*; Togashi, Tomoaki*; Tsunoda, Yusuke*; Utsuno, Yutaka; Yoshida, Toru*

Physica Scripta, 92(6), p.063001_1 - 063001_19, 2017/06

https://doi.org/10.1088/1402-4896/aa65e4
 Times Cited Count：32 Percentile：82.26(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Type II shell evolution in $$A=70$$ isobars from the $$N geq 40$$ island of inversion

Morales, A. I.*; Benzoni, G.*; Watanabe, H.*; Tsunoda, Yusuke*; Otsuka, T.*; Nishimura, Shunji*; Browne, F.*; Daido, R.*; Doornenbal, P.*; Fang, Y.*; et al.

Physics Letters B, 765, p.328 - 333, 2017/02

https://doi.org/10.1016/j.physletb.2016.12.025
 Times Cited Count：38 Percentile：92.50(Astronomy & Astrophysics)

Journal Articles

Are there signatures of harmonic oscillator shells far from stability?; First spectroscopy of $$^{110}$$Zr

Paul, N.*; Corsi, A.*; Obertelli, A.*; Doornenbal, P.*; Authelet, G.*; Baba, Hidetada*; Bally, B.*; Bender, M.*; Calvet, D.*; Ch$^a$teau, F.*; et al.

Physical Review Letters, 118(3), p.032501_1 - 032501_7, 2017/01

https://doi.org/10.1103/PhysRevLett.118.032501
 Times Cited Count：46 Percentile：88.34(Physics, Multidisciplinary)

Journal Articles

Large-scale shell-model studies for exotic nuclei; Probing shell evolution

Utsuno, Yutaka; Otsuka, Takaharu*; Shimizu, Noritaka*; Tsunoda, Yusuke*; Homma, Michio*; Abe, Takashi*; Mizusaki, Takahiro*; Togashi, Tomoaki*; Brown, B. A.*

Proceedings of International Conference on Nuclear Theory in the Supercomputing Era 2014 (NTSE 2014), p.29 - 34, 2016/00

http://ntse.khb.ru/files/uploads/2014/proceedings/Utsuno.pdf

no abstracts in English

Journal Articles

Recent advances in shell evolution with shell-model calculations

Utsuno, Yutaka; Otsuka, Takaharu*; Tsunoda, Yusuke*; Shimizu, Noritaka*; Homma, Michio*; Togashi, Tomoaki*; Mizusaki, Takahiro*

JPS Conference Proceedings (Internet), 6, p.010007_1 - 010007_8, 2015/06

https://doi.org/10.7566/JPSCP.6.010007

no abstracts in English

Journal Articles

Identification of deformed intruder states in semi-magic $$^{70}$$Ni

Chiara, C. J.*; Weisshaar, D.*; Janssens, R. V. F.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Harker, J. L.*; Walters, W. B.*; Recchia, F.*; Albers, M.*; Alcorta, M.*; et al.

Physical Review C, 91(4), p.044309_1 - 044309_10, 2015/04

https://doi.org/10.1103/PhysRevC.91.044309
 Times Cited Count：40 Percentile：90.88(Physics, Nuclear)

The neutron-rich isotope $$^{70}$$Ni was produced by multi-nucleon transfer reactions of $$^{70}$$Zn in the Argonne National Laboratory, and an in-beam $$gamma$$-ray experiment were performed using the GRETINA array. The $$2^+_2$$ and $$4^+_2$$ levels of $$^{70}$$Ni were observed for the first time. Those levels are regarded as large deformed states associated with proton excitation from the $$f_{7/2}$$ orbit because they cannot be reproduced by a shell-model calculation assuming a small valence space without $$f_{7/2}$$. A theoretical analysis based on the Monte Carlo shell model published in 2014 indicates that those levels corresponds to a prolate deformed band. The present result demonstrates the occurrence of shape coexistence in neutron-rich Ni isotopes other than a known case of $$^{68}$$Ni, and confirms the predictive power of the Monte Carlo shell-model calculation.

Journal Articles

Nature of isomerism in exotic sulfur isotopes

Utsuno, Yutaka; Shimizu, Noritaka*; Otsuka, Takaharu*; Yoshida, Toru*; Tsunoda, Yusuke*

Physical Review Letters, 114(3), p.032501_1 - 032501_5, 2015/01

AA2014-0621.pdf:0.23MB

https://doi.org/10.1103/PhysRevLett.114.032501
 Times Cited Count：40 Percentile：84.71(Physics, Multidisciplinary)

In usual even-even nuclei, $$0^+_1$$, $$2^+_1$$, $$4^+_1cdots$$ states are known to be connected via strong $$E2$$ transitions. The recently observed $$4^+_1$$ state in the neutron-rich nucleus $$^{44}$$S has a strongly hindered $$E2$$ transition to the $$4^+_1$$ state. We report the origin of this strong hindrance in this paper. While shell-model calculations reproduce the hindrance, their many-body wave functions are too complicated for one to understand the nature. In this study, we introduce a novel method to obtain wave functions in the intrinsic frame by performing the variation after angular-momentum projection. The $$0^+_1$$, $$2^+_1$$ states are dominated by the usual $$K=0$$ state, whereas for the $$4+$$ level the $$K=4$$ state is lower than $$K=0$$ state, which causes the $$E2$$ hindrance. We also account for similar $$E2$$ hindrance in $$^{43}$$S in this framework. The $$4^+$$ level is the lightest-mass high-$$K$$ isomer ever found.

Journal Articles

Recent shell-model results for exotic nuclei

Utsuno, Yutaka; Otsuka, Takaharu*; Shimizu, Noritaka*; Homma, Michio*; Mizusaki, Takahiro*; Tsunoda, Yusuke*; Abe, Takashi*

EPJ Web of Conferences, 66, p.02106_1 - 02106_8, 2014/03

https://doi.org/10.1051/epjconf/20146602106
 Times Cited Count：15 Percentile：96.56(Physics, Nuclear)

no abstracts in English

27 (Records 1-20 displayed on this page)