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25 April 2024 |
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Heavy Residues with A<90 in the Asymmetric Reaction of 20 AMeV 124Sn+27Al as a Sensitive Probe of the Onset of Multifragmentation | | M. Veselsky
; G.A. Souliotis
; G. Chubarian
; L. Trache
; A. Keksis
; E. Martin
; A. Ruangma
; E. Winchester
; S. J. Yennello
; | | Date: |
24 Oct 2002 | | Subject: | nucl-ex | | Abstract: | The cross sections and velocity distributions of heavy residues from the reaction of 20 AMeV 124Sn + 27Al have been measured at forward angles using the MARS recoil separator at Texas A&M in a wide mass range. A consistent overall description of the measured cross sections and velocity distributions was achieved using a model calculation employing the concept of deep-inelastic transfer for the primary stage of peripheral collisions, pre-equilibrium emission and incomplete fusion for the primary stage of more violent central collisions and the statistical model of multifragmentation (SMM code) for the deexcitation stage. An alternative calculation employing the sequential binary decay (GEMINI code) could not reproduce the observed yields of the residues from violent collisions (A<90) due to different kinematic properties. The success of SMM demonstrates that the heavy residues originate from events where a competition of thermally equilibrated fragment partitions takes place rather than a sequence of binary decays. | | Source: | arXiv, nucl-ex/0210030 | | Services: | Forum | Review | PDF | Favorites | |
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