Speaker
Prof.
Thorsten Kroell
(TU Darmstadt)
Description
Nucleon-transfer reactions like (d,p) or (t,p) have been a well-established tool to investigate the single-particle properties of nuclei for many decades. Applied to exotic nuclei they have to be performed in inverse kinematics and, in many cases, combined with gamma-ray spectroscopy.
The region around the ``island of inversion'' where the traditional shell closure at N=20 disappears has been studied at REX-ISOLDE (CERN)[1,2] with the MINIBALL array consisting of 24 six-fold segmented HPGe detectors [3] and the particle detector T-REX [4]. Similar investigations have been performed around 68Ni evaluating a local shell closure at N=40 [5].
For more energetic beams nucleon-knockout reactions are a similar tool. A possible new magic number at N=32 or 34 beyond 48Ca has been addressed at GSI by studying neutron-rich Ti and Sc isotopes [6,7]. The combination of the FRS with MINIBALL allowed for the measurement of exclusive momentum distributions.
Nucleon-knockout reactions are also a sensitive method to populate different configurations in the final nucleus by varying the primary beam. This has been exploited recently to study neutron-rich Mg and Na isotopes at NSCL employing the GRETINA array for gamma-ray detection [8].
We will present the status of the research programmes as well as discuss the perspectives for future experiments at HIE-ISOLDE (CERN) and with R3B at FAIR.
This work is supported by the German BMBF (grants No. 06DA9036I, 05P12RDCIA, and 05P12RDFN8), HIC for FAIR, EU through EURONS (No. 506065) and ENSAR (No. 262010) and the MINIBALL and REX-ISOLDE collaborations.
References
[1] K. Wimmer et al., Phys. Rev. Lett. 105, 252501 (2010).
[2] V. Bildstein et al., to be published.
[3] N. Warr et al., Eur. Phys. J. A 49, 40 (2013).
[4] V. Bildstein et al., Eur. Phys. J A 48, 85 (2012).
[5] J. Diriken et al., to be published.
[6] P. Maierbeck et al., Phys. Lett. B 675, 22 (2009).
[7] S. Schwertel et al., Eur. Phys. J. A 48, 191 (2012).
[8] K. Wimmer et al., to be published.
Primary author
Prof.
Thorsten Kroell
(TU Darmstadt)
