@Article{Vitez-Sveiczer_etal2022,
author="Vitez-Sveiczer, A. et al
and Algora, A.
and Morales, A. I.
and Rubio, B.
and Agramunt, J.
and Guadilla, V.
and Montaner-Piza, A.
and Orrigo, S. E. A.",
title="The beta-decay of Kr-70 into Br-70: Restoration of the pseudo-SU(4) symmetry",
journal="Physics Letters B",
year="2022",
publisher="Elsevier",
volume="830",
pages="137123--8pp",
optkeywords="Beta decay of Kr-70; pn pairing; GT strength distribution; Pseudo-SU(4) symmetry; QRPA calculations",
abstract="The beta-decay of the even-even nucleus Kr-70 with Z=N+2, has been investigated at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center using the BigRIPS fragment separator, the ZeroDegree Spectrometer, the WAS3ABI implantation station and the EURICA HPGe cluster array. Fifteen gamma-rays associated with the beta-decay of( 70)Kr into Br-70 have been identified for the first time, defining ten populated states below E-exc=3300 keV. The half-life of Kr-70 was derived with increased precision and found to be t(1/2)=45.19 +/- 0.14 ms. The beta-delayed proton emission probability has also been determined as epsilon(p)=0.545(23){\%}. An increase in the beta-strength to the yrast 1(+) state in comparison with the heaviest Z=N+2 system studied so far (Ge-62 decay) is observed that may indicate increased np correlations in the T=0 channel. The beta-decay strength deduced from the results is interpreted in terms of the proton-neutron quasiparticle random-phase approximation (pnQRPA) and also with a schematic model that includes isoscalar and isovector pairing in addition to quadrupole deformation. The application of this last model indicates an approximate realization of pseudo-SU(4) symmetry in this system.",
optnote="WOS:000832707200002",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5316), last updated on Tue, 30 Aug 2022 11:27:24 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2022.137123",
opturl="https://doi.org/10.1016/j.physletb.2022.137123",
language="English"
}