The RISING project was designed to perform high-resolution gamma-ray spectroscopy with radioactive beams at GSI. Unstable beams were produced by fragmentation of relativistic heavy ion projectiles provided by the SIS synchrotron. The fragment separator FRS was used to select and to focus the exotic fragments at about 100A MeV energy on a secondary target. Various charged particle detectors enabled an event-by-event tracking of the incoming radioactive projectiles and the reaction products, thus allowing for a selection of the nuclei of interest and their velocity vector reconstruction. The gamma-ray detection system consisting of the EUROBALL Cluster Ge detectors and the large volume HECTOR BaF2 detectors measured prompt gamma-radiation from nuclei excited in the secondary target. Despite the huge Doppler shift due to the high recoil velocity (beta approximate to 40%), RISING achieved a gamma-energy resolution below 2%. The paper reviews the present status of the RISING project.
Status of the rising project at relativistic energies / P. Bednarczyk, A. Banu, T. Beck, F. Becker, M.A. Bentley, G. Benzoni, A. Bracco, A. Burger, F. Camera, P. Doornenbal, C. Fahlander, H. Geissel, J. Gerl, M. Gorska, H. Grawe, J. Grebosz, G. Hammond, M. Hellstrom, H. Hubel, J. Jolie, M. Kmiecik, I. Kojouharov, N. Kurz, R. Lozeva, A. Maj, S. Mandal, W. Meczynski, B. Million, S. Muralithar, P. Reiter, D. Rudolph, N. Saito, T.R. Saito, H. Schaffner, J. Simpson, J. Styczen, N. Warr, H. Weick, C. Wheldon, O. Wieland, M. Winkler, H.J. Wollersheim. - In: ACTA PHYSICA POLONICA B. - ISSN 0587-4254. - 36:4(2005 Apr), pp. 1235-1244.
Status of the rising project at relativistic energies
A. Bracco;F. Camera;
2005
Abstract
The RISING project was designed to perform high-resolution gamma-ray spectroscopy with radioactive beams at GSI. Unstable beams were produced by fragmentation of relativistic heavy ion projectiles provided by the SIS synchrotron. The fragment separator FRS was used to select and to focus the exotic fragments at about 100A MeV energy on a secondary target. Various charged particle detectors enabled an event-by-event tracking of the incoming radioactive projectiles and the reaction products, thus allowing for a selection of the nuclei of interest and their velocity vector reconstruction. The gamma-ray detection system consisting of the EUROBALL Cluster Ge detectors and the large volume HECTOR BaF2 detectors measured prompt gamma-radiation from nuclei excited in the secondary target. Despite the huge Doppler shift due to the high recoil velocity (beta approximate to 40%), RISING achieved a gamma-energy resolution below 2%. The paper reviews the present status of the RISING project.
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