Fragmentation of 95 MeV/u 12C and 75 MeV/u 13C. Application to secondary-beam production |
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| Authors: | G Farés R Bimbot S Hachem M Mirea R Anne T Benfoughal C Cabot F Clapier P Delbourgo-Salvador T Ethvignot A Lefebvre M Lewitowicz P Roussel-Chomaz M G Saint-Laurent J E Sauvestre J L Sida Yang Yong Feng |
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| Institution: | (1) Université de Nice-Valrose, F-06108 Nice Cedex, France;(2) Institut de Physique Nucléaire; IN2P3/CNRS and UPS XI, F-91406 Orsay Cedex, France;(3) Institute of Atomic Physics, P.O. Box MG-6, Bucharest, Romania;(4) BP 5027, GANIL, F-14021 Caen Cedex, France;(5) CEA, BP 12, DPTA/SPN, F-91680 Bruyéres le Châtel, France;(6) IN2P3/CNRS and UPS XI, CSNSM, F-91406 Orsay Cedex, France;(7) DAPNIA CEN Saclay, F-91191 Gif-sur-Yvette Cedex, France |
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| Abstract: | The fragmentation of 95 MeV/u 12C and 75 MeV/u 13C projectiles, interacting with natural targets of different elements (9Be,
Cu and 197Au for 12C, and 9Be,
Ni, and 181Ta for 13C) and of various thicknesses has been investigated at GANIL, using the doubly achromatic magnetic spectrometer LISE. The projectile-like fragments transmitted at 0
have been analysed using a silicon
-E telescope and the
-time-of-flight method. The results obtained with the thinnest targets are discussed in the scope of radioactive nuclear beam production. The fragment momentum distributions can be fitted by Gaussian peaks associated with exponential tails towards low momentum values. The experimental production yields are compared with the results of the simulation code LISE. It appears that this code reproduces satisfactorily the yields of nuclei close to the stability line, but strongly overestimates the production of very neutron-deficient nuclei.Received: 17 September 2002, Revised: 25 July 2003, Published online: 18 December 2003PACS:
25.70.Mn Projectile and target fragmentation - 29.90. + r Other topics in elementary-particle and nuclear physics experimental methods and instrumentation |
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