Beta-Delayed Proton Emission Branches in 43Cr

TL;DR

This study investigates the beta-delayed proton emission in the decay of 43Cr using an imaging time projection chamber, revealing multiple proton emission channels and establishing 43Cr as the second known case of beta-3p decay.

Contribution

The paper provides the first detailed measurement of branching ratios for beta-delayed proton emissions in 43Cr, including the rare beta-3p decay mode.

Findings

Beta-delayed proton emission channels identified and quantified.

Branching ratios determined: 81%, 7.1%, and 0.08% for one-, two-, and three-proton emissions.

First observation of beta-3p decay in 43Cr.

Abstract

The beta+ decay of very neutron deficient 43Cr has been studied by means of an imaging time projection chamber which allowed recording tracks of charged particles. Events of beta-delayed emission of one-, two-, and three protons were clearly identified. The absolute branching ratios for these channels were determined to be 81(4)%, 7.1(4)%, and 0.08(3)%, respectively. The 43Cr is thus established as the second case in which the beta-3p decay occurs. Although the feeding to the proton-bound states in 43V is expected to be negligible, the large branching ratio of 12(4)% for decays without proton emission is found.