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Entrance Channel Shell Effects on Fusion Hindrance

Entrance Channel Shell Effects on Fusion Hindrance. Introduction Idea of the model 3. Results 4. Conclusions. J.Błocki, J.Wilczyński. Experimental evidence. G.Fazio et al., Phys.Rev. C72, 064614 (2005). Compound systems:. 223 228 232.

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Entrance Channel Shell Effects on Fusion Hindrance

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  1. Entrance Channel Shell Effects on Fusion Hindrance • Introduction • Idea of the model • 3. Results • 4. Conclusions J.Błocki, J.Wilczyński

  2. Experimental evidence G.Fazio et al., Phys.Rev. C72, 064614 (2005) Compound systems:

  3. 223 228 232 Z.H.Liu and Jing-Dong Bao, Phys.Rev.C76,034604(2007)

  4. 187.0 227 181.7 221.7

  5. Rayleigh-Lagrange equations of motion L=T-V F – one-body dissipation

  6. Potential energy

  7. 1.Myers, Swiatecki (1966) 2.Moller, Nix, Myers, Swiatecki 3.Myers, Swiatecki + 3 MeV 4.Myers, Swiatecki - 3 MeV

  8. Dissipative energy Wall formula Window formula

  9. Smoluchowski approach Y.Abe et al., Acta Phys. Pol. B34,2091(2003) W.J.Swiatecki, K.Siwek-Wilczynska and J.Wilczynski, Acta Phys.Pol.B34,2049(2003) W.J.Swiatecki, K.Siwek-Wilczynska and J.Wilczynski, Phys.Rev.C71,014602(2005)

  10. P=0.4372

  11. P=0.7739

  12. Ecm=240MeV

  13. Ecm=230MeV

  14. Conclusions 1. Introduced shells are not able to predict experimental differences in the cross sections. The calculated ratio of the formation probabilities is at the maximum up to 3 compared to more than two orders of magnitude in the ratio of experimental cross sections. 2. One could accomodate the remaining factor in the survival probabilities, but this is not the case (K.W.)

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