Evolution of Collectivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Kr</mml:mi></mml:mrow><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>72</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>: Evidence for Rapid Shape Transition

Iwasaki, H.; Lemasson, A.; Morse, C.; Dewald, Α.; Braunroth, T.; Bader, V. M.; Baugher, T.; Bazin, D.; Berryman, J. S.; Campbell, C. M.; Gade, A.; Langer, C.; Lee, I. Y.; Loelius, C.; Lunderberg, E.; Recchia, F.; Smalley, D.; Stroberg, S. R.; Wadsworth, R.; Walz, C.; Weißhaar, D.; Westerberg, Arthur W.; Whitmore, K.; Wimmer, K.

doi:10.1103/physrevlett.112.142502

Cited by 64 publications

(29 citation statements)

References 33 publications

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“…The comparison with QRPA calculations [40] [14] suggest the occurrence of a rapid prolate-oblate shape transition from the purely prolate band identified in [12] towards the ground state. Although suggesting a dominant oblate deformation for the ground state, a certain amount of mixing with the prolate deformed 0 + state was suggested by another experimental work [11].…”

Section: E Discussionmentioning

confidence: 86%

“…It corresponds to a quadrupole deformation parameter |β 2 | = 0.33 (2). A recent determination of the strengths of the deexciting transitions from the 4 + state [14] [14] reinforces the idea of a shape transition to an oblate 0 + 1 ground state or shape mixing between these two low-lying 0 + states. The newer value of the B(E2; 2 + 1 → 0 + 1 ) agrees with the previous result of [13].…”

Section: Introductionmentioning

confidence: 80%

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Shape study of theN=ZnucleusKr72viaβdecay

et al. 2015

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The β decay of the N = Z nucleus 72 Kr has been studied with the total absorption spectroscopy technique at ISOLDE (CERN). A total B(GT) = 0.79(4)g 2 A /4π has been found up to an excitation energy of 2.7 MeV. The B(GT) distribution obtained is compared with predictions from state-of-the-art theoretical calculations to learn about the ground state deformation of 72 Kr. Although a dominant oblate deformation is suggested by direct comparison with quasiparticle random phase approximation (QRPA) calculations, beyond-mean-field and shell-model calculations favor a large oblate-prolate mixing in the ground state.

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Section: E Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 80%

Shape study of theN=ZnucleusKr72viaβdecay

et al. 2015

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“…The experiment was performed at the National Superconducting Cyclotron Laboratory, using the same experimental setup of [25]. A primary beam of 78 Kr was accelerated to 150 MeV per nucleon by the K500 and K1200 coupled cyclotrons and incident on a 9 Be target to produce a secondary cocktail beam including 74 Kr.…”

Section: Methodsmentioning

confidence: 99%

Lifetime measurement of the41+state ofNi58with the recoil distance method

et al. 2016

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The quadrupole transition rate for the 4 + 1 → 2 + 1 transition of 58 Ni was determined from an application of the recoil distance method with the GRETINA array. The present result of the B(E2; 4 + 1 → 2 + 1 ) was found to be 50 +11 −6 e 2 fm 4 , which is about three times smaller than the literature value, indicating substantially less collectivity than previously believed. Shell model calculations performed with the GXPF1A effective interaction agree with the present data and the validity of the standard effective charges in understanding collectivity in the Nickel isotopes is discussed.

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“…For even-even nuclei populated in (p,2p) reactions (see, e.g., Refs. [44][45][46][47]), the strongest observed γ decay in the spectrum stems from the transition (2 + 1 ) → 0 + 1 , while the second strongest intensity typically originates from the (4 + 1 ) → (2 + 1 ) transition. The inset in Fig.…”

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confidence: 97%

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

Lettmann¹,

Werner²,

Pietralla³

et al. 2017

Phys. Rev. C

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γ -ray transitions between low-spin states of the neutron-rich 84,86,88 Ge were measured by means of in-flight γ -ray spectroscopy at 270 MeV/u. Excited 6 + 1 , 4 + 1,2 , and 2 + 1,2 states of 84,86 Ge and 4 + 1 and 2 + 1,2 states of 88 Ge were observed. Furthermore, a candidate for a 3 + 1 state of 86 Ge was identified. This state plays a key role in the discussion of ground-state triaxiality of 86 Ge, along with other features of its low-energy level scheme. A new region of triaxially deformed nuclei is proposed in the Ge isotopic chain.

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Evolution of Collectivity inKr72: Evidence for Rapid Shape Transition

Cited by 64 publications

References 33 publications

Shape study of theN=ZnucleusKr72viaβdecay

Shape study of theN=ZnucleusKr72viaβdecay

Lifetime measurement of the41+state ofNi58with the recoil distance method

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

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