Quasielastic barrier distributions for the systems: Influence of weak channels
A Trzcińska, E Piasecki, K Hagino, W Czarnacki… - Physical Review C, 2015 - APS
A Trzcińska, E Piasecki, K Hagino, W Czarnacki, P Decowski, N Keeley, M Kisieliński…
Physical Review C, 2015•APSBackground: Near-barrier fusion can be strongly affected by the coupling between relative
motion and internal degrees of freedom of the collision partners. The coupled channels (CC)
method is a usual way of describing the reaction dynamics in this energy region. In the
standard approach in the CC method only strong reaction channels (collective excitations)
are taken into account. However, in some cases this approach fails to describe
experimentally obtained barrier height distributions. Purpose: The influence of weak …
motion and internal degrees of freedom of the collision partners. The coupled channels (CC)
method is a usual way of describing the reaction dynamics in this energy region. In the
standard approach in the CC method only strong reaction channels (collective excitations)
are taken into account. However, in some cases this approach fails to describe
experimentally obtained barrier height distributions. Purpose: The influence of weak …
Background: Near-barrier fusion can be strongly affected by the coupling between relative motion and internal degrees of freedom of the collision partners. The coupled channels (CC) method is a usual way of describing the reaction dynamics in this energy region. In the standard approach in the CC method only strong reaction channels (collective excitations) are taken into account. However, in some cases this approach fails to describe experimentally obtained barrier height distributions.
Purpose: The influence of weak (noncollective) reaction channels on barrier height distributions was studied.
Method: The barrier height distributions were determined from quasielastic scattering of on targets. The scattered ions were registered at backward angles (130–150 degrees).
Results: In the and cases one observes a “structure” (two peaks) in the barrier height distribution which is completely smoothed out for .
Conclusions: The results support the hypothesis that noncollective excitations of the target nuclei, much more numerous in than in and , influence the barrier height distribution and are responsible for smoothing out the structure.
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