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Signature of $$0^{+}$$ excited state and shape coexistence in $$^{94}$$Kr through $$^{93}$$Kr(d,p)$$^{94}$$Kr reaction

Walter, D.*; Smallcombe, J. ; 25 of others*

A measurement of the excitation spectrum of $$^{94}$$Kr via one-neutron transfer to the ground state of $$^{93}$$Kr using the $$^{93}$$Kr(d,p)$$^{94}$$Kr reaction at 8A MeV, observing the outgoing protons, performed with the IRIS facility at TRIUMF is reported. Two states in $$^{94}$$Kr, at 1.50$$pm$$0.14 MeV and 2.20$$pm$$0.14 MeV, were observed. An adiabatic-wave approximation analysis of the differential cross sections leads us to identify the lower energy state as being populated with neutron transfer to the 3 orbital. This leads to the first observation of the lowest $$0^{+}$$ excited state in $$^{94}$$Kr, hence signaling shape co-existence. Theoretical calculations performed within the in-medium similarity renormalization group framework are presented that also show the existence of a low-energy $$0^{+}$$ state, aligning qualitatively with the observation.

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English

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Physics Letters B

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862

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p.139352_1 - 139352_6

Publication Year/Month

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2025/03

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Paper URL

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https://doi.org/10.1016/j.physletb.2025.139352

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Category:Astronomy & Astrophysics

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