Investigation of the Gamow‐Teller strength near the doubly‐magic nucleus 100Sn

Neutron deficient nuclei near 100Sn have been produced by projectile fragmentation of a 1 A⋅GeV 112Sn beam in a beryllium target. The fragments were separated in the magnetic spectrometer FRS at GSI, Darmstadt. The unambigiuously identified ions were stopped in a highly segmented silicon strip detector stack which was designed to measure the halflives and the total energy of emitted particles with very low background and high efficiency. We were able to study 102Sn in decay spectroscopy for the first time and establish a decay scheme for the daughter nuclide 102In. With the measurement of the halflife and the Q‐value the Gamow‐Teller (GT) strength could be deduced. Additionally the Q‐value of 98Cd was measured with high precision.