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Journal Articles

Sequential nature of ($$p,3p$$) two-proton knockout from neutron-rich nuclei

Frotscher, A.*; G$'o$mez-Ramos, M.*; Obertelli, A.*; Doornenbal, P.*; Authelet, G.*; Baba, Hidetada*; Orlandi, R.; 86 of others*

Physical Review Letters, 125(1), p.012501_1 - 012501_7, 2020/07

Journal Articles

How different is the core of $$^{25}$$F from $$^{24}$$O$$_{g.s.}$$ ?

Tang, T. L.*; Uesaka, Tomohiro*; Kawase, Shoichiro; Beaumel, D.*; Dozono, Masanori*; Fujii, Toshihiko*; Fukuda, Naoki*; Fukunaga, Taku*; Galindo-Uribarri. A.*; Hwang, S. H.*; et al.

Physical Review Letters, 124(21), p.212502_1 - 212502_6, 2020/05

 Times Cited Count:1 Percentile:100(Physics, Multidisciplinary)

The structure of a neutron-rich $$^{25}$$F nucleus is investigated by a quasifree ($$p,2p$$) knockout reaction. The sum of spectroscopic factors of $$pi 0d_{5/2}$$ orbital is found to be 1.0 $$pm$$ 0.3. The result shows that the $$^{24}$$O core of $$^{25}$$F nucleus significantly differs from a free $$^{24}$$O nucleus, and the core consists of $$sim$$35% $$^{24}$$O$$_{rm g.s.}$$, and $$sim$$65% excited $$^{24}$$O. The result shows that the $$^{24}$$O core of $$^{25}$$F nucleus significantly differs from a free $$^{24}$$O nucleus. The result may infer that the addition of the $$0d_{5/2}$$ proton considerably changes the neutron structure in $$^{25}$$F from that in $$^{24}$$O, which could be a possible mechanism responsible for the oxygen dripline anomaly.

Journal Articles

Shell structure of the neutron-rich isotopes $$^{69,71,73}$$Co

Lokotko, T.*; Leblond, S.*; Lee, J.*; Doornenbal, P.*; Obertelli, A.*; Poves, A.*; Nowacki, F.*; Ogata, Kazuyuki*; Yoshida, Kazuki; Authelet, G.*; et al.

Physical Review C, 101(3), p.034314_1 - 034314_7, 2020/03

 Times Cited Count:0 Percentile:100(Physics, Nuclear)

The structures of the neutron-rich $$^{69,71,73}$$Co isotopes were investigated via ($$p,2p$$) knockout reactions at the Radioactive Isotope Beam Factory, RIKEN. Level schemes were reconstructed using the $$gamma-gamma$$ coincidence technique, with tentative spin-parity assignments based on the measured inclusive and exclusive cross sections. Comparison with shell-model calculations suggests coexistence of spherical and deformed shapes at low excitation energies in the $$^{69,71,73}$$Co isotopes.

Journal Articles

Restoration of the natural $$E(1/2^+_1)-E(3/2^+_1)$$ energy splitting in odd-K isotopes towards $$N=40$$

Sun, Y. L.*; Obertelli, A.*; Doornenbal, P.*; Barbieri, C.*; Chazono, Yoshiki*; Duguet, T.*; Liu, H. N.*; Navr$'a$til, P.*; Nowacki, F.*; Ogata, Kazuyuki*; et al.

Physics Letters B, 802, p.135215_1 - 135215_7, 2020/03

 Times Cited Count:2 Percentile:27.79(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Shell evolution of $$N$$ = 40 isotones towards $$^{60}$$Ca; First spectroscopy of $$^{62}$$Ti

Cort$'e$s, M. L.*; Rodriguez, W.*; Doornenbal, P.*; Obertelli, A.*; Holt, J. D.*; Lenzi, S. M.*; Men$'e$ndez, J.*; Nowacki, F.*; Ogata, Kazuyuki*; Poves, A.*; et al.

Physics Letters B, 800, p.135071_1 - 135071_7, 2020/01

 Times Cited Count:2 Percentile:11.68(Astronomy & Astrophysics)

Excited states in the $$N$$ = 40 isotone $$^{62}$$Ti were populated via the $$^{63}$$V($$p$$,$$2p$$)$$^{62}$$Ti reaction at $$sim$$200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using $$gamma$$-ray spectroscopy. The energies of the $$2_1^+ rightarrow 0_{rm gs}^+$$ and $$4_1^+ rightarrow 2_1^+$$ transitions, observed here for the first time, indicate a deformed Ti ground state. These energies are increased compared to the neighboring $$^{64}$$Cr and $$^{66}$$Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings.

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

Prominence of pairing in inclusive ($$p,2p$$) and ($$p,pn$$) cross sections from neutron-rich nuclei

Paul, N.*; Obertelli, A.*; Bertulani, C. A.*; Corsi, A.*; Doornenbal, P.*; Rodriguez-Sanchez, J. L.*; Authelet, G.*; Orlandi, R.; 84 of others*

Physical Review Letters, 122(16), p.162503_1 - 162503_7, 2019/04

 Times Cited Count:2 Percentile:42.99(Physics, Multidisciplinary)

Journal Articles

Nuclear structure of $$^{76}$$Ni from the ($$p$$,$$2p$$) reaction

Elekes, Z.*; Kripk$'o$, $'A$*; Sohler, D.*; Sieja, K.*; Ogata, Kazuyuki*; Yoshida, Kazuki; Doornenbal, P.*; Obertelli, A.*; Authelet, G.*; Baba, Hidetada*; et al.

Physical Review C, 99(1), p.014312_1 - 014312_7, 2019/01

 Times Cited Count:3 Percentile:24.4(Physics, Nuclear)

The nuclear structure of the $$^{76}$$Ni nucleus was investigated by ($$p$$,$$2p$$) reaction using a NaI(Tl) array to detect the deexciting prompt $$gamma$$ rays. A new transition with an energy of 2227 keV was identified by $$gamma gamma$$ and $$gamma gamma gamma$$ coincidences. Our shell-model calculations using the Lenzi, Nowacki, Poves, and Sieja interaction produced good candidates for the experimental proton hole states in the observed energy region, and the theoretical cross sections showed good agreement with the experimental values. Although we could not assign all the experimental states to the theoretical ones unambiguously, the results are consistent with a reasonably large Z = 28 shell gap for nickel isotopes in accordance with previous studies.

Journal Articles

Shell evolution beyond $$Z$$=28 and $$N$$=50; Spectroscopy of $$^{81,82,83,84}$$Zn

Shand, C. M.*; Podoly$'a$k, Zs.*; G$'o$rska, M.*; Doornenbal, P.*; Obertelli, A.*; Nowacki, F.*; Otsuka, T.*; Sieja, K.*; Tostevin, J. A.*; Tsunoda, T.*; et al.

Physics Letters B, 773, p.492 - 497, 2017/10

 Times Cited Count:13 Percentile:12.73(Astronomy & Astrophysics)

Journal Articles

Shape evolution in neutron-rich krypton isotopes beyond N=60; First spectroscopy of $$^{98,100}$$Kr

Flavigny, F.*; Doornenbal, P.*; Obertelli, A.*; Delaroche, J.-P.*; Girod, M.*; Libert, J.*; Rodriguez, T. R.*; Authelet, G.*; Baba, Hidetada*; Calvet, D.*; et al.

Physical Review Letters, 118(24), p.242501_1 - 242501_6, 2017/06

 Times Cited Count:21 Percentile:10.69(Physics, Multidisciplinary)

Journal Articles

Low-lying structure and shape evolution in neutron-rich Se isotopes

Chen, S.*; Doornenbal, P.*; Obertelli, A.*; Rodriguez, T. R.*; Authelet, G.*; Baba, Hidetada*; Calvet, D.*; Ch$^a$teau, F.*; Corsi, A.*; Delbart, A.*; et al.

Physical Review C, 95(4), p.041302_1 - 041302_6, 2017/04

 Times Cited Count:15 Percentile:9.8(Physics, Nuclear)

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

 Times Cited Count:23 Percentile:9.46(Physics, Multidisciplinary)

Journal Articles

Shell evolution beyond $$N$$=40; $$^{69,71,73}$$Cu

Sahin, E.*; Doncel, M.*; Sieja, K.*; de Angelis, G.*; Gadea, A.*; Quintana, B.*; G$"o$rgen, A.*; Modamio, V.*; Mengoni, D.*; Valiente-Dob$'o$n, J. J.*; et al.

Physical Review C, 91(3), p.034302_1 - 034302_9, 2015/03

 Times Cited Count:19 Percentile:14.91(Physics, Nuclear)

Journal Articles

Limited asymmetry dependence of correlations from single nucleon transfer

Flavigny, F.*; Gillibert, A.*; Nalpas, L.*; Obertelli, A.*; Keeley, N.*; Barbieri, C.*; Beaumel, D.*; Boissinot, S.*; Burgunder, G.*; Cipollone, A.*; et al.

Physical Review Letters, 110(12), p.122503_1 - 122503_5, 2013/03

 Times Cited Count:49 Percentile:8.97(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

In-beam $$gamma$$-ray spectroscopy of $$^{35}$$Mg and $$^{33}$$Na

Gade, A.*; Basin, D.*; Brown, B. A.*; Campbell, C. M.*; Cook, J. M.*; Ettenauer, S.*; Glasmacher, T.*; Kemper, K. W.*; McDaniel, S.*; Obertelli, A.*; et al.

Physical Review C, 83(4), p.044305_1 - 044305_5, 2011/04

 Times Cited Count:17 Percentile:24.36(Physics, Nuclear)

no abstracts in English

Journal Articles

Spectroscopy of $$^{36}$$Mg; Interplay of normal and intruder configurations at the neutron-rich boundary of the "Island of Inversion"

Gade, A.*; Adrich, P.*; Bazin, D.*; Bowen, M. D.*; Brown, B. A.*; Campbell, C. M.*; Cook, J. M.*; Ettenauer, S.*; Glasmacher, T.*; Kemper, K. W.*; et al.

Physical Review Letters, 99(7), p.072502_1 - 072502_4, 2007/08

 Times Cited Count:69 Percentile:8.95(Physics, Multidisciplinary)

no abstracts in English

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