The experimental setup dedicated to studies of exotic nuclei with electromagnetic and ligh hadronic probes (EXL) is part of the FAIR project. The aim of the EXL experiment is to study the structure of unstable exotic nuclei in light-ion scattering experiments at intermediate energies. The objective is to capitalise on light-ion reactions in inverse kinematics by using novel storage-ring techniques and a universal detector system providing high resolution and large solid angle coverage in kinematically complete measurements.

The apparatus is foreseen being installed at the internal target at the NESR storage-cooler ring. It comprises a silicon target-recoil detector for charged particles, completed by gamma-ray and slow-neutron detectors, located around the internal gas-jet target, a forward detectors for fast ejectiles (both charged particles and neutrons) and an in-ring heavy-ion spectrometer. 
The overall design for the recoil and gamma-ray detector for EXL is divided in two major arrays, the Silicon Particle Array (ESPA) to detect light charged particles from the target and the Gamma and Particle Array (EGPA) to detect punch-through particles and gamma-rays. 

Work is also underway for the in-ring detectors, notably for the detection of fast neutron and proton ejectiles in forward direction. The LAND detector will be used to detect these particles and its geometry has to be modifed to accomodate a beam pipe in its centre.

Spokesperson: Prof. Dr. Thomas Aumann

GSI Liason: Prof. Dr. Rene Reifarth

Information for staff and guests

If you are planning to come to GSI and work at the R³B experimental setup, the following information will be important for you; it is strongly recommended to use Internet Explorer/Edge and/or Mozilla Firefox, with Chrome some of the registration forms below do not function properly:

• Registration at GSI - if you register for the first time, please fill in Haik Simon as the local contact person.
• GSI Welcome Office - if you need an invitation, questions about insurance, funding oportunities...
• User service of GSI (guest house)
• Entrance requirements for caves during beam operation
• Online safety training - important: for Cave C, you need the radiation safety AND the general safety AND the Cave C safety training not older than 12 months. In case you have problems with Cave C safety training access, please contact Haik Simon. Please note, when you log in for the first time, you need to type in the local contact person. Please fill in Haik Simon. This is mandatory, otherwise Haik Simon can not asign the needed instructions to the user.
• Internet is available via wifi with an eduroam account or by a guest account (link to application form).

If you have any further questions concerning the webpage of our group, please contact Aleksandra Kelic-Heil.