Proton-induced quasifree scattering reactions studied in inverse kinematics with the LAND-R3B experiment at GSI/FAIR
- When?
- Tuesday 12 June 2012, 14:00
- Where?
- 30BB03 Physics Seminar Room
- Open to:
- Students, Staff
- Speaker:
- Dr Marielle Chartier, University of Liverpool, UK
Understanding nucleon-nucleon correlations beyond the nuclear mean-field and their modification as a function of density, temperature and isospin asymmetry of the nuclear medium will determine the nature of many-body systems as diverse as finite nuclei, extended nuclear matter and compact astrophysical objects such as n stars. The most direct experimental probes to study single-particle properties of nuclei and investigate the role of correlations in nuclei and nuclear matter are the high-energy p- and electron-induced quasifree scattering reactions, such as (p,2p) and (e,e′p), from which absolute spectroscopic factors can be derived. Both valence and deeply bound nucleons can be removed, enabling different densities to be studied and probing different types of correlations.
First exclusive measurements of proton-induced quasifree scattering reactions have been performed recently at GSI in inverse kinematics with the LAND-R3B setup using both stable and radioactive beams. In particular the 12C(p,2p)11B reaction was studied using a 4π Si+NaI target-recoil detector for both nucleons and gammas and forward detectors for heavy fragments and particles from the decay of continuum states. The spectral function after p-knockout was extracted for the first time from observing the heavy residues in the final state, combining gamma spectroscopy and the invariant-mass method. High-energy intense radioactive beams at FAIR will enable such measurements on exotic nuclei with the R3B experiment. Central to these is the new STFC-funded R3B Silicon Tracker currently under construction at the University of Liverpool in collaboration with STFC Daresbury Laboratory and the Universities of Birmingham, Edinburgh and Surrey. R3B opens the prospects for a wide-ranging experimental programme, e.g. the study of the role of correlations in asymmetric nuclei and nuclear matter, of the cluster- and shell-structure of exotic nuclei and of unbound states beyond the dripline.
