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- W3082430062 abstract "Background: Neutron-rich nuclei around neutron number N=60 show a dramatic shape transition from spherical ground states to prolate deformation in Sr98 and heavier nuclei. Purpose: The purpose of this study is to investigate the single-particle structure approaching the shape transitional region. Method: The level structures of neutron-rich Sr93,94,95 were studied via the H2(Sr94,95,96,t) one-neutron stripping reactions at TRIUMF using a beam energy of 5.5 AMeV. γ-rays emitted from excited states and recoiling charged particles were detected by using the TIGRESS and SHARC arrays, respectively. States were identified by gating on the excitation energy and, if possible, the coincident γ radiation. Results: Triton angular distributions for the reactions populating states in ejectile nuclei Sr93,94,95 were compared with distorted wave Born approximation calculations to assign and revise spin and parity quantum numbers and extract spectroscopic factors. The results were compared with shell-model calculations and the reverse (d,p) reactions and good agreement was obtained. Conclusions: The results for the H2(Sr94,t)Sr93 and H2(Sr95,t)Sr94 reactions are in good agreement with shell-model calculations. A two-level mixing analysis for the 0+ states in Sr94 suggest strong mixing of two shapes. For the H2(Sr96,t)Sr95 reaction the agreement with the shell-model is less good. The configuration of the ground state of Sr96 is already more complex than predicted, and therefore indications for the shape transition can already be observed before N=60.9 MoreReceived 14 January 2020Accepted 17 August 2020DOI:https://doi.org/10.1103/PhysRevC.102.024335©2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasDirect reactionsSpectroscopic factors & electromagnetic momentsTransfer reactionsProperties90 ≤ A ≤ 149TechniquesRadioactive beamsNuclear Physics" @default.
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- W3082430062 date "2020-08-31" @default.
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- W3082430062 title "Single-particle structure in neutron-rich Sr isotopes approaching the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>60</mml:mn></mml:mrow></mml:math> shape transition" @default.
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- W3082430062 doi "https://doi.org/10.1103/physrevc.102.024335" @default.
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