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Journal Articles

First observation of $$^{28}$$O

Kondo, Yosuke*; Achouri, N. L.*; Al Falou, H.*; Atar, L.*; Aumann, T.*; Baba, Hidetada*; Boretzky, K.*; Caesar, C.*; Calvet, D.*; Chae, H.*; et al.

Nature, 620(7976), p.965 - 970, 2023/08

https://doi.org/10.1038/s41586-023-06352-6
 Times Cited Count：5 Percentile：92.64(Multidisciplinary Sciences)

no abstracts in English

Journal Articles

Intruder configurations in $$^{29}$$Ne at the transition into the island of inversion; Detailed structure study of $$^{28}$$Ne

Wang, H.*; Yasuda, Masahiro*; Kondo, Yosuke*; Nakamura, Takashi*; Tostevin, J. A.*; Ogata, Kazuyuki*; Otsuka, Takaharu*; Poves, A.*; Shimizu, Noritaka*; Yoshida, Kazuki; et al.

Physics Letters B, 843, p.138038_1 - 138038_9, 2023/08

https://doi.org/10.1016/j.physletb.2023.138038
 Times Cited Count：2 Percentile：68.16(Astronomy & Astrophysics)

Detailed $$gamma$$-ray spectroscopy of the exotic neon isotope $$^{28}$$Ne has been performed using the one-neutron removal reaction from $$^{29}$$Ne. Based on an analysis of parallel momentum distributions, a level scheme with spin-parity assignments has been constructed for $$^{28}$$Ne and the negative-parity states are identified for the first time. The measured partial cross sections and momentum distributions reveal a significant intruder p-wave strength providing evidence of the breakdown of the N = 20 and N = 28 shell gaps. Only a weak, possible f-wave strength was observed to bound final states. Large-scale shell-model calculations with different effective interactions do not reproduce the large p-wave and small f-wave strength observed experimentally, indicating an ongoing challenge for a complete theoretical description of the transition into the island of inversion along the Ne isotopic chain.

Journal Articles

Neutron capture cross sections of light neutron-rich nuclei relevant for $$r$$-process nucleosynthesis

Bhattacharyya, A.*; Datta, U.*; Rahaman, A.*; Chakraborty, S.*; Aumann, T.*; Beceiro-Novo, S.*; Boretzky, K.*; Caesar, C.*; Carlson, B. V.*; Catford, W. N.*; et al.

Physical Review C, 104(4), p.045801_1 - 045801_14, 2021/10

AA2021-0553.pdf:7.41MB

https://doi.org/10.1103/PhysRevC.104.045801
 Times Cited Count：5 Percentile：57.13(Physics, Nuclear)

no abstracts in English

Journal Articles

Pairing forces govern population of doubly magic $$^{54}$$Ca from direct reactions

Browne, F.*; Chen, S.*; Doornenbal, P.*; Obertelli, A.*; Ogata, Kazuyuki*; Utsuno, Yutaka; Yoshida, Kazuki; Achouri, N. L.*; Baba, Hidetada*; Calvet, D.*; et al.

Physical Review Letters, 126(25), p.252501_1 - 252501_7, 2021/06

https://doi.org/10.1103/PhysRevLett.126.252501
 Times Cited Count：10 Percentile：69.3(Physics, Multidisciplinary)

Direct proton-knockout reactions of $$^{55}$$Sc were studied at the RIKEN Radioactive Isotope Beam Factory. Populated states of $$^{54}$$Ca were investigated through $$gamma$$-ray and invariant-mass spectroscopy. Level energies were calculated from the nuclear shell model employing a phenomenological inter-nucleon interaction. Theoretical cross sections to states were calculated from distorted-wave impulse approximation estimates multiplied by the shell model spectroscopic factors. Despite the calculations showing a significant amplitude of excited neutron configurations in the ground-state of $$^{55}$$Sc, valence proton removals populated predominantly the ground-state of $$^{54}$$Ca. This counter-intuitive result is attributed to pairing effects leading to a dominance of the ground-state spectroscopic factor. Owing to the ubiquity of the pairing interaction, this argument should be generally applicable to direct knockout reactions from odd-even to even-even nuclei.

Journal Articles

Ground-state configuration of neutron-rich $$^{35}$$Al via Coulomb breakup

Chakraborty, S.*; Datta, U.*; Aumann, T.*; Beceiro-Novo, S.*; Boretzky, K.*; Caesar, C.*; Carlson, B. V.*; Catford, W. N.*; Chartier, M.*; Cortina-Gil, D.*; et al.

Physical Review C, 96(3), p.034301_1 - 034301_9, 2017/09

https://doi.org/10.1103/PhysRevC.96.034301
 Times Cited Count：4 Percentile：27.61(Physics, Nuclear)

no abstracts in English

Journal Articles

Shape coexistence in $$^{68}$$Ni

Suchyta, S.*; Liddick, S. N.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Bennett, M. B.*; Chemey, A.*; Homma, Michio*; Larson, N.*; Prokop, C. J.*; Quinn, S. J.*; et al.

Physical Review C, 89(2), p.021301_1 - 021301_5, 2014/02

https://doi.org/10.1103/PhysRevC.89.021301
 Times Cited Count：79 Percentile：97.46(Physics, Nuclear)

no abstracts in English

Journal Articles

Ion specific effects on the structure of molten AF-ZrF$$_4$$ systems (A$$^+$$ = Li$$^+$$, Na$$^+$$, and K$$^+$$)

Pauvert, O.*; Salanne, M.*; Zanghi, D.*; Simon, C.*; Reguer, S.*; Thiaudi$`e$re, D.*; Okamoto, Yoshihiro; Matsuura, Haruaki*; Bessada, C.*

Journal of Physical Chemistry B, 115(29), p.9160 - 9167, 2011/07

https://doi.org/10.1021/jp203137h
 Times Cited Count：64 Percentile：81.85(Chemistry, Physical)

The structure of molten AF-ZrF$$_4$$ system (A$$^+$$=Li$$^+$$, Na$$^+$$, K$$^+$$) is studied using EXAFS spectroscopy with molecular dynamics simulations. From the Zr$$^{4+}$$ solvation shell point of view, we observe a progressive stabilization of the 7-fold and then of the 6-fold coordinated complexes when passing from Li$$^+$$ to Na$$^+$$ and K$$^+$$ as a "counterion". Particular attention is given to the systems consisting of 35 mol% of ZrF$$_4$$. At that particular composition, the ZrF$$_6$$$$^{2-}$$ complex predominates largely whatever the nature of the alkali. The calculated vibrational properties of this complex are in excellent agreement with a previous Raman spectroscopy experiment on molten KF-ZrF$$_4$$. The most important differences are observed for the lifetime of these octahedral units. On a larger scale, an intense first sharp diffraction peak is observed for the Zr$$^{4+}$$-Zr$$^{4+}$$ partial structure factor, which can be attributed to the correlations between the octahedral units formed.

Journal Articles

In situ experimental evidence for a nonmonotonous structural evolution with composition in the molten LiF-ZrF$$_4$$ system

Pauvert, O.*; Zanghi, D.*; Salanne, M.*; Simon, C.*; Rakhamatullin, A.*; Matsuura, Haruaki*; Okamoto, Yoshihiro; Vivet, F.*; Bessada, C.*

Journal of Physical Chemistry B, 114(19), p.6472 - 6479, 2010/05

https://doi.org/10.1021/jp912195j
 Times Cited Count：60 Percentile：79.38(Chemistry, Physical)

The structure of the molten LiF-ZrF$$_4$$ system up to 50 mol% ZrF$$_4$$ was investigated by combining high-temperature nuclear magnetic resonance (NMR) and extended X-ray absorption fine structure (EXAFS) experiments with molecular dynamics (MD) calculations. $$^{91}$$Zr high-temperature NMR experiments give an average coordination of 7 for the zirconium ion on all domains of composition. MD simulations, in agreement with EXAFS experiments at the K-edge of Zr, provide evidence for the coexistence of three different Zr-based complexes, [ZrF$$_6$$]$$^{2-}$$, [ZrF$$_7$$]$$^{3-}$$, and [ZrF$$_8$$]$$^{4-}$$, in the melt.

Journal Articles

Validation of $$^{131}$$I ecological transfer models and thyroid dose assessments using Chernobyl fallout data from the Plavsk district, Russia

Zvonova, I.*; Krajewski, P.*; Berkovsky, V.*; Ammann, M.*; Duffa, C.*; Filistovic, V.*; Homma, Toshimitsu; Kany$'a$r, B.*; Nedveckaite, T.*; Simon, S. L.*; et al.

Journal of Environmental Radioactivity, 101(1), p.8 - 15, 2010/01

https://doi.org/10.1016/j.jenvrad.2009.08.005
 Times Cited Count：6 Percentile：17.82(Environmental Sciences)

Journal Articles

Validation of environmental transfer models and assessment of the effectiveness of countermeasures using data on $$^{131}$$I releases from Chernobyl

Krajewski, P.*; Ammann, M.*; Bartuskov$'a$, M.*; Duffa, C.*; Filistovic, V.*; Homma, Toshimitsu; Kany$'a$r, B.*; Mal$'a$tov$'a$, I.*; Nedveckaite, T.*; Simon, S.*; et al.

Applied Radiation and Isotopes, 66(11), p.1730 - 1735, 2008/11

https://doi.org/10.1016/j.apradiso.2007.11.022
 Times Cited Count：6 Percentile：40.09(Chemistry, Inorganic & Nuclear)

Journal Articles

Validation of ecological $$^{131}$$I transfer models using experimental data of the "Plavsk scenario"

Zvonova, I.*; Krajewski, P.*; Berkovskyy, V.*; Ammann, M.*; Duffa, C.*; Filistovic, V.*; Homma, Toshimitsu; Kany$'a$r, B.*; Nedveckaite, T.*; Simon, S.*; et al.

Proceedings of 7th International Conference on Nuclear and Radiochemistry (NRC-7) (CD-ROM), 5 Pages, 2008/08

11 (Records 1-11 displayed on this page)
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