2022 Impact factor 2.7
Hadrons and Nuclei

Eur. Phys. J. A 10, 85-95

Potential and limitations of nucleon transfer experiments with radioactive beams at REX-ISOLDE

C. Gund1, H. Bauer1, J. Cub2, A. Dietrich1, T. Härtlein1, H. Lenske3, D. Pansegrau1, A. Richter2, H. Scheit1, G. Schrieder2 and D. Schwalm1

1  Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
2  Institut für Kernphysik, Technische Universität Darmstadt, D-64298 Darmstadt, Germany
3  Institut für Theoretische Physik, Universität Gießen, D-35392 Gießen, Germany


(Received: 9 October 2000 Communicated by J. Äystö)

As a tool for studying the structure of nuclei far off stability the technique of $\gamma$-ray spectroscopy after low-energy single-nucleon transfer reactions with radioactive nuclear beams in inverse kinematics was investigated. Modules of the MINIBALL germanium array and a thin position-sensitive parallel plate avalanche counter (PPAC) to be employed in future experiments at REX-ISOLDE were used in a test experiment performed with a stable 36S beam on deuteron and 9Be targets. It is demonstrated that the Doppler broadening of $\gamma$ lines detected by the MINIBALL modules is considerably reduced by exploiting their segmentation, and that for beam intensities up to 106 particles/s the PPAC positioned around zero degrees with respect to the beam axis allows not only to significantly reduce the $\gamma$ background by requiring coincidences with the transfer products but also to control the beam and its intensity by single particle counting. The predicted large neutron pickup cross-sections of neutron-rich light nuclei on 2H and 9Be targets at REX-ISOLDE energies of 2.2 MeV$\cdot A$ are confirmed.

29.40.Cs - Gas-filled counters: ionization chambers, proportional, and avalanche counters.
29.30.Kv - X- and $\gamma$-ray spectroscopy.
25.60.Je - Transfer reactions.

© Società Italiana di Fisica, Springer-Verlag 2001