Experimental Nuclear Physics

Nuclear Spectroscopy using Multi-detector Systems

Atomic nuclei at high excitation energy with a high angular momentum in extreme configurations of isospin and deformation may be produced in heavy ion reactions at accelerator laboratories. The internal structure of such nuclei are today studied with large detector arrays for high-resolution gamma-rays, neutron and charged particle spectroscopy. Examples of international accelerator laboratories where we are involved in heavy-ion collision experiments are listed below.

University of Jyväskylä, Finland
GANIL, France
GSI, Germany
LNL, Italy
RIKEN, Japan
Argonne National Laboratory, USA

Contact Prof. Bo Cederwall, for more information.

Compton Imaging

The aim of this project is to develop a detector system that can create an image in gamma-rays that has a 4Pi sensitivity and requires no collimators. Physics of the interactions between gamma-rays and matter, namely of the Compton scattering process, make it possible to reconstruct the direction of the incoming photons, and thus create an image, provided that the scattering paths of gamma rays can be determined. We are applying this idea on a single planar pixelated Germanium detector and using pulse shape analysis methods to achieve the necessary position resolution.

Contact Prof. Bo Cederwall, for more information.

Detector Development and Gamma-Ray Tracking

AGATA

The AGATA (Advanced Gamma Tracking Array) project is a European collaboration aimed at the construction of a new-generation 4Pi gamma spectrometer for nuclear physics applications. The array is designed for a great efficiency at high gamma-ray multiplicities and high Doppler shifts. AGATA will consist of 180 hexagonal 36-fold segmented large-volume HPGe detectors covering 80% of the solid angle. In this array, the need for Compton suppression detectors is eliminated through the use of pulse shape analysis and gamma-ray tracking. The first detectors have been manufactured and are currently being tested in various European labs.

Links to the AGATA project:

GSI – Darmstadt
LNL – Padova
TU – Munich
University of Liverpool

Contact Prof. Bo Cederwall, for more information.

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