Triaxiality of neutron-rich 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ge</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>84</mml:mn><mml:mo>,</mml:mo><mml:mn>86</mml:mn><mml:mo>,</mml:mo><mml:mn>88</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>
 from low-energy nuclear spectra

Lettmann, M.; Werner, V.; Pietralla, N.; Doornenbal, P.; Obertelli, A.; Rodríguez, T. R.; Sieja, K.; Authelet, G.; Baba, H.; Calvet, D.; Château, F.; Chen, Shaohua; Corsi, A.; Delbart, A.; Gheller, J.-M.; Giganon, A.; Gillibert, A.; Lapoux, V.; Motobayashi, T.; Nııkura, M.; Paul, N.; Roussé, J.-Y.; Sakuraï, H.; Santamaria, C.; Steppenbeck, D.; Taniuchi, R.; Uesaka, T.; Ando, Takashi; Arıcı, T.; Blazhev, A.; Browne, F.; Bruce, A. M.; Caroll, R. J.; Chung, L. X.; Cortés, M. L.; Dewald, M.; Ding, Bing; Flavigny, F.; Franchoo, S.; Górska, M.; Gottardo, A.; Jungclaus, A.; Lee, J.; Linh, B. D.; Liu, J.; Liu, Z.; Lizarazo, C.; Momiyama, S.; Moschner, K.; Nagamine, S.; Nakatsuka, N.; Niță, Cristina; Nobs, C.R.; Olivier, L.; Patel, Z.; Podolyák, Zs.; Rudigier, M.; Saito, T.; Shand, C.; Söderström, P.-A.; Stefan, I.; Vaquero, V.; Wimmer, K.; Xu, Z. Y.

doi:10.1103/physrevc.96.011301

Cited by 36 publications

(9 citation statements)

References 64 publications

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“…Triaxiality has been the subject of investigation in the nearby isotopic chains of Ge and Se [38][39][40][41], and is also suggested for adjacent even-even 72 Zn [12,13], although it has not previously been known to exist in 73 Zn. Experimental evidence for triaxial deformation is usually provided by γ -ray spectroscopy, as in the even-even isotopes 74 [43,44].…”

Section: B Triaxial Shapementioning

confidence: 99%

Investigating the large deformation of the 5/2+ isomeric state in Zn73 : An indicator for triaxiality

Yang¹,

Tsunoda²,

Babcock³

et al. 2018

Phys. Rev. C

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Recently reported nuclear spins and moments of neutron-rich Zn isotopes measured at ISOLDE-CERN [C. Wraith et al., Phys. Lett. B 771, 385 (2017)] show an uncommon behavior of the isomeric state in 73 Zn. Additional details relating to the measurement and analysis of the 73m Zn hyperfine structure are addressed here to further support its spin-parity assignment 5/2 + and to estimate its half-life. A systematic investigation of this 5/2 + isomer indicates that significant collectivity appears due to proton/neutron E2 excitations across the proton Z = 28 and neutron N = 50 shell gaps. This is confirmed by the good agreement of the observed quadrupole moments with large scale Monte Carlo shell model calculations. In addition, potential energy surface calculations in combination with T plots reveal a triaxial shape for this isomeric state.

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Section: B Triaxial Shapementioning

confidence: 99%

Investigating the large deformation of the 5/2+ isomeric state in Zn73 : An indicator for triaxiality

Yang¹,

Tsunoda²,

Babcock³

et al. 2018

Phys. Rev. C

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“…The primary objective of the present work was to investigate further this scenario by studying the origin of collective quadrupole effects beyond the N ¼ 50 shell gap, focusing on their evolutions in N ¼ 52 even-even isotones approaching Z ¼ 28 thanks to the measurement of reduced electric quadrupole transition probabilities BðE2; 2 þ → 0 þ Þ. This was an a priori demanding task in view of the accumulation of evidencethough so far only model-dependently inferred-for triaxiality approaching Z ¼ 32 [14,15]. The measurement of 2 þ state lifetimes seemed then the ideal approach, because the extraction of BðE2Þ from Coulomb-excitation cross sections might be distorted either by unmeasured diagonal E2 matrix elements having unexpected values originating from triaxial dynamics or, more importantly, by transitions to yet unobserved or unidentified low-lying 0 þ states originating from shape coexistence.…”

mentioning

confidence: 99%

“…Seven, five, and two transitions in 88 Kr, 86 Se, and 84 Ge, already identified in Refs. [15,27,28], respectively, could be studied and the effective or intrinsic lifetimes (uncorrected or corrected for the feeding lifetimes, respectively) of the corresponding decaying states were extracted. We report in Table I results relevant for the present discussion.…”

mentioning

confidence: 99%

Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the Ni78 Region: A Hint from Lifetime Measurements

Delafosse¹,

Verney²,

Marević³

et al. 2018

Phys. Rev. Lett.

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Lifetime measurements of excited states of the light N ¼ 52 isotones 88 Kr, 86 Se, and 84 Ge have been performed, using the recoil distance Doppler shift method and VAMOS and AGATA spectrometers for particle identification and gamma spectroscopy, respectively. The reduced electric quadrupole transition probabilities BðE2; 2 þ → 0 þ Þ and BðE2; 4 þ → 2 þ Þ were obtained for the first time for the hard-to-reach 84 Ge. While the BðE2; 2 þ → 0 þ Þ values of 88 Kr, 86 Se saturate the maximum quadrupole collectivity offered by the natural valence (3s, 2d, 1g 7=2 , 1h 11=2) space of an inert 78 Ni core, the value obtained for 84 Ge largely exceeds it, suggesting that shape coexistence phenomena, previously reported at N ≲ 49, extend beyond N ¼ 50. The onset of collectivity at Z ¼ 32 is understood as due to a pseudo-SU(3) organization of the proton single-particle sequence reflecting a clear manifestation of pseudospin symmetry. It is realized that Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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“…Thus, only bound final states were measured. Details of the experimental campaigns can be found in [24,[35][36][37][38][39][40][41][42]. Events considered for the cross section determination were triggered by a thin plastic scintillator few meters upstream the hydrogen target.…”

mentioning

confidence: 99%

Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei

Frotscher¹,

Gómez-Ramos²,

Obertelli³

et al. 2020

Phys. Rev. Lett.

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Twenty-one two-proton knockout ðp; 3pÞ cross sections were measured from neutron-rich nuclei at ∼250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for the first time, demonstrating that the ðp; 3pÞ kinematics are consistent with two sequential proton-proton collisions within the projectile nucleus. Ratios of ðp; 3pÞ over ðp; 2pÞ inclusive cross sections follow the trend of other many-nucleon removal reactions, further reinforcing the sequential nature of ðp; 3pÞ in neutron-rich nuclei.

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Triaxiality of neutron-rich Ge84,86,88 from low-energy nuclear spectra

Cited by 36 publications

References 64 publications

Investigating the large deformation of the 5/2+ isomeric state in Zn73 : An indicator for triaxiality

Investigating the large deformation of the 5/2+ isomeric state in Zn73 : An indicator for triaxiality

Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the Ni78 Region: A Hint from Lifetime Measurements

Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei

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