Abstract
Excited states in the Tz=−1 nucleus 70Kr have been populated using inelastic scattering of a radioactive 70Kr beam as well as one- and two-neutron removal reactions from 71,72Kr at intermediate beam energies. The level scheme of 70Kr was constructed from the observed γ-ray transitions and coincidences. Tentative spin and parity assignments were made based on comparison with the mirror nucleus 70Se. A second 2+ state and a candidate for the corresponding 42+ state suggest shape coexistence in 70Kr.
Highlights
Excited states in the T z = −1 nucleus 70Kr have been populated using inelastic scattering of a radioactive 70Kr beam as well as one- and two-neutron removal reactions from 71,72Kr at intermediate beam energies
Tentative spin and parity assignments were made based on comparison with the mirror nucleus 70Se
Which differ by the interchange of proton and neutron number, differences arise from Coulomb effects and isospin nonconserving terms in the nuclear interaction
Summary
Excited states in the T z = −1 nucleus 70Kr have been populated using inelastic scattering of a radioactive 70Kr beam as well as one- and two-neutron removal reactions from 71,72Kr at intermediate beam energies. Comparison of the relative final state exclusive cross sections of these reactions allow for tentative spin and parity assignments of states in 70Kr. The observation of the 2+2 state and a candidate for the 4+2 state suggest the presence of shape coexistence in 70Kr. The experiment was performed at the Radioactive Isotope Beam
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