β-delayed proton decays of 93Pd and 92Rh

β-delayed proton emission in the100Sn region

“…[35], but was later revised to 1.0(2) s [36]. Subsequent experiments confirmed the shorter half-life [27,37]. A half-life of 1.15(5) s was deduced in this work based on a fit of the βp-decay curve, again in agreement with the most recent measurements in the literature.…”

“…[27]. Taking the statistical model calculations [37] at face value, this new result is more consistent with a 7/2 + ground state for 93 Pd (b βp = 4.8%) as opposed to the previously proposed 9/2 + ground state (b βp = 1.7%). The energy spectrum of β-delayed protons, shown in Fig.…”

“…7). The intensities of the three observed γ-ray transitions with energies 865.5(2), 991.5(3), and 817 keV are 100, 15.5(60)%, and <8%, respectively, and are compatible with the relative βp-branching ratios to different states in 92 Ru predicted for the βp decay of a 9/2 + 93 Pd ground state [37]. The total β-delayed proton branch for 93 Pd was deduced to be 7.5(5)%, similar to the upper limit of 5% reported in Ref.…”

“…While this γ-ray transition was not observed in the experiment reported in Ref. [37] evidence for this specific decay pathway was found in this work (see Fig. 7).…”

“…Ref. [37] could not be excluded [37]. Decay of a 9/2 + ground state of 93 Pd is expected to weakly populate the 6 + state in 92 Ru, resulting in the emission of a 817 keV γ ray.…”