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HK: Fachverband Hadronen und Kerne

HK 36: Nuclear Structure and Dynamics I

HK 36.2: Talk

Tuesday, March 17, 2009, 16:45–17:00, H-ZO 40

Nuclei production in the spallation reaction ¹³⁶Xe (200 MeV/A)+¹H — •Carlos Paradela — Universidad de Santiago de Compostela,, Spain

For several years, an extensive research program in spallation reactions have carried out at GSI (Darmstadt, Germany) taking advantage of the relativistic heavy-ion beams and the high-resolution magnetic spectrometer (FRS)[1]. The measured cross sections are highly relevant for the validation of the existing nuclear codes in their low energy range. These codes are employed in the studies for radioactive beam facilities (RIBs) or accelerator-driven systems (ADS) dedicated to the radioactive waste incineration.

The study of ¹³⁶Xe on Hydrogen at 1000, 500 and 200 MeV/A is conceived as an extension of the previous experimental data in order to provide decisive information on the energy dependence of the spallation process, achieving the lowest primary beam energy ever studied at FRS for a projectile that present a behaviour close to the heaviest elements.

In this work, the reaction ¹³⁶Xe + p at 200 MeV/A has been studied by separating and identifying the produced fragments and determining their kinematical properties. The results obtained for the production cross section were compared to different codes describing the spallation process such as ISABEL, INCL4 or ABLA. The integral cross section obtained is compatible with the value given by the optic-model computation from Karol [2].

[1] Charms web site http://www-w2k.gsi.de/charms/data.htm

[2] P.J. Karol, Phys. Rev. C 11, 1203 (1975)