β-feeding Intensity Distribution of ⁷³Co From Total Absorption Spectroscopy

The β-decay properties of isotopes far from stability are necessary for improving astrophysical r-process abundance calculations and validating nuclear structure models. Nuclei far from stability tend to have large β-decay Q-values, often leading to decay schemes with many weak β-decay branches and multiple deexcitation pathways to the ground state. These weak branches are difficult to detect with high efficiency detectors. These issues may be overcome using a large volume, high efficiency g-ray detector that can simultaneously measure all g-rays emitted following a β-decay event allowing for reconstruction of the initial excited state populated in the β-decay. In this work, the β-decay of ⁷³Co was studied at the NSCL using the Summing NaI(Tl) (SuN) detector [1]. Implanted ions and subsequent β-decay electrons were detected using a DSSD while β-delayed g-rays were measured in SuN. The resulting feeding intensities are used to calculate the Gamow-Teller strength distribution (B(GT)) for the β decay of ⁷³Co. The β-decay properties of neighboring isotopes have been completed previously using the same experimental setup and will be compared with the results of this analysis [2-3].



[1] NIM Phys. Res. A 703, 16 (2013)

[2] PRC 100.2 (2019): 025806

[3] PRL 117.14 (2016): 142701