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Boltzmann-Uehling-Uhlenbech calculation of total reaction cross-section and fragmentation cross-section

Authors:	X. Z. Cai C. Zhong W. Q. Shen Y. G. Ma H. Y. Zhang Y. B. Wei J. G. Chen W. Guo K. Wang G. L. Ma X. F. Zhou

Affiliation:	(1) Shanghai Institute of Nuclear Research, CAS, 201800 Shanghai, PRC;(2) CCAST (World Laboratory), P.O. Box 8730, 100080 Beijing, PRC;(3) Physics Department of Ningbo University, 315211 Ningbo, PRC

Abstract:	$sigma_{rm R}$ , $sigma_{-n}$ and $sigma_{-2n}$ have been calculated via the BUU model with soft EOS and 0.8 times of $sigma_{rm Cug}$ . The density distribution without any adjustable parameters which comes from the RMF model has been introduced into the BUU calculation to replace the normally used one-parameter square-type distribution. The calculated results can reproduce the experimental data well for both halo- and stable-nuclei-induced reactions. Here $sigma_{-n}$ or $sigma_{-2n}$ is calculated as the difference between $sigma_{rm R}$ of halo nucleus and core nucleus, by assuming $sigma_{rm corr}simeq 0$ . It indicates that this assumption works very well at high energy in the BUU calculation. More experimental measurements are necessary to test the validity of this assumption at intermediate energy.Received: 12 June 2003, Revised: 29 September 2003, Published online: 27 April 2004PACS: 24.10.-i Nuclear reaction models and methods - 25.60.Dz Interaction and reaction cross-sections - 25.60.Gc Breakup and momentum distributions - 27.20. + n

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