Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-07-23
Phys.Rev. C67 (2003) 034609
Physics
Nuclear Physics
Nuclear Theory
Scientific paper
10.1103/PhysRevC.67.034609
Statistical fragment emission from excited nuclear systems is studied within the framework of a schematic Fermi-gas model combined with Weisskopf's detailed balance approach. The formalism considers thermal expansion of finite nuclear systems and pays special attention to the role of the diffuse surface region in the decay of hot equilibrated systems. It is found that with increasing excitation energy, effects of surface entropy lead to a systematic and significant reduction of effective emission barriers for fragments and, eventually, to the vanishing of these barriers. The formalism provides a natural explanation for the occurrence of negative nuclear heat capacities reported in the literature. It also accounts for the observed linearity of pseudo-Arrhenius plots of the logarithm of the fragment emission probability {\it versus} the inverse square-root of the excitation energy, but does not predict true Arrhenius behavior of these emission probabilities.
Lu Jun
Schroder Udo W.
Toke Jan
No associations
LandOfFree
The Role of Surface Entropy in Statistical Emission of Massive Fragments from Equilibrated Nuclear Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Role of Surface Entropy in Statistical Emission of Massive Fragments from Equilibrated Nuclear Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Role of Surface Entropy in Statistical Emission of Massive Fragments from Equilibrated Nuclear Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-469370