Abstract
The β-delayed two-proton (β2p) decay of S27 was studied using a state-of-the-art silicon array and Clover-type HPGe detectors. An energy peak at 6372(15) keV with a branching ratio of 2.4(5)% in the decay-energy spectrum was identified as a two-proton transition via the isobaric-analog state in P27 to the ground state of Al25 in the β decay of S27. Two-proton angular correlations were measured by the silicon array to study the mechanism of two-proton emission. Based on experimental results and Monte Carlo simulations, it was found that the main mechanism for the emission of β2p by S27 is of sequential nature.Received 3 March 2021Accepted 21 May 2021DOI:https://doi.org/10.1103/PhysRevC.103.L061301©2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBeta decayLifetimes & widthsNuclear structure & decaysProton emissionProperties20 ≤ A ≤ 38Nuclear Physics
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