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N/Z Dependence of Projectile Fragmentation

Abstract : The N/Z dependence of projectile fragmentation at relativistic energies has been studied in a recent experiment at the GSI laboratory with the ALADiN forward spectrometer coupled to the LAND neutron detector. Besides a primary beam of 124Sn, also secondary beams of 124La and 107Sn delivered by the FRS fragment separator have been used in order to extend the range of isotopic compositions of the produced spectator sources. With the achieved mass resolution of \Delta A/A \approx 1.5%, lighter isotopes with atomic numbers Z \le 10 are individually resolved. The presently ongoing analyses of the measured isotope yields focus on isoscaling and its relation to the properties of hot fragments at freeze-out and on the derivation of chemical freeze-out temperatures which are found to be independent of the isotopic composition of the studied systems. The latter result is at variance with the predictions for limiting temperatures as obtained with finite-temperature Hartree-Fock calculations.
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http://hal.in2p3.fr/in2p3-00192683
Contributor : Dominique Girod <>
Submitted on : Thursday, November 29, 2007 - 11:09:04 AM
Last modification on : Wednesday, September 30, 2020 - 11:06:14 AM

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W. Trautmann, P. Adrich, T. Aumann, C.O. Bacri, T. Barczyk, et al.. N/Z Dependence of Projectile Fragmentation. International Workshop on Nuclear Dynamics in Heavy-Ion Reactions and Neutron Stars, Jul 2007, Beijing, China. pp.1838-1849, ⟨10.1142/S0218301308010829⟩. ⟨in2p3-00192683⟩

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