Oscillations above the barrier in the fusion of 28 Si + 28 Si
Abstract
Fusion cross sections of Si-28 + Si-28 have been measured in a range above the barrier with a very small energy step (Delta E-lab = 0.5 MeV). Regular oscillations have been observed, best evidenced in the first derivative of the energy-weighted excitation function. For the first time, quite different behaviors (the appearance of oscillations and the trend of sub-barrier cross sections) have been reproduced within the same theoretical frame, i.e., the coupled-channel model using the shallow M3Y + repulsion potential. The calculations suggest that channel couplings play an important role in the appearance of the oscillations, and that the simple relation between a peak in the derivative of the energy-weighted cross section and the height of a centrifugal barrier is lost, and so is the interpretation of the second derivative of the excitation function as a barrier distribution for this system, at energies above the Coulomb barrier.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- Croatian Science Foundation; USDOE Office of Science - Office of Nuclear Physics; European Commission - Community Research and Development Information Service (CORDIS) - Seventh Framework Programme (FP7)
- OSTI Identifier:
- 1392415
- DOE Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Volume: 746; Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Montagnoli, G., Stefanini, A. M., Esbensen, H., Corradi, L., Courtin, S., Fioretto, E., Grebosz, J., Haas, F., Jia, H. M., Jiang, C. L., Mazzocco, M., Michelagnoli, C., Mijatović, T., Montanari, D., Parascandolo, C., Scarlassara, F., Strano, E., Szilner, S., and Torresi, D. Oscillations above the barrier in the fusion of 28 Si + 28 Si. United States: N. p., 2015.
Web. doi:10.1016/j.physletb.2015.05.021.
Montagnoli, G., Stefanini, A. M., Esbensen, H., Corradi, L., Courtin, S., Fioretto, E., Grebosz, J., Haas, F., Jia, H. M., Jiang, C. L., Mazzocco, M., Michelagnoli, C., Mijatović, T., Montanari, D., Parascandolo, C., Scarlassara, F., Strano, E., Szilner, S., & Torresi, D. Oscillations above the barrier in the fusion of 28 Si + 28 Si. United States. https://doi.org/10.1016/j.physletb.2015.05.021
Montagnoli, G., Stefanini, A. M., Esbensen, H., Corradi, L., Courtin, S., Fioretto, E., Grebosz, J., Haas, F., Jia, H. M., Jiang, C. L., Mazzocco, M., Michelagnoli, C., Mijatović, T., Montanari, D., Parascandolo, C., Scarlassara, F., Strano, E., Szilner, S., and Torresi, D. 2015.
"Oscillations above the barrier in the fusion of 28 Si + 28 Si". United States. https://doi.org/10.1016/j.physletb.2015.05.021.
@article{osti_1392415,
title = {Oscillations above the barrier in the fusion of 28 Si + 28 Si},
author = {Montagnoli, G. and Stefanini, A. M. and Esbensen, H. and Corradi, L. and Courtin, S. and Fioretto, E. and Grebosz, J. and Haas, F. and Jia, H. M. and Jiang, C. L. and Mazzocco, M. and Michelagnoli, C. and Mijatović, T. and Montanari, D. and Parascandolo, C. and Scarlassara, F. and Strano, E. and Szilner, S. and Torresi, D.},
abstractNote = {Fusion cross sections of Si-28 + Si-28 have been measured in a range above the barrier with a very small energy step (Delta E-lab = 0.5 MeV). Regular oscillations have been observed, best evidenced in the first derivative of the energy-weighted excitation function. For the first time, quite different behaviors (the appearance of oscillations and the trend of sub-barrier cross sections) have been reproduced within the same theoretical frame, i.e., the coupled-channel model using the shallow M3Y + repulsion potential. The calculations suggest that channel couplings play an important role in the appearance of the oscillations, and that the simple relation between a peak in the derivative of the energy-weighted cross section and the height of a centrifugal barrier is lost, and so is the interpretation of the second derivative of the excitation function as a barrier distribution for this system, at energies above the Coulomb barrier.},
doi = {10.1016/j.physletb.2015.05.021},
url = {https://www.osti.gov/biblio/1392415},
journal = {Physics Letters B},
issn = {0370-2693},
number = C,
volume = 746,
place = {United States},
year = {Mon Jun 01 00:00:00 EDT 2015},
month = {Mon Jun 01 00:00:00 EDT 2015}
}
Works referenced in this record:
Fusion Cross Sections of Light Heavy-Ion Systems: Resonances and Shell Effects
journal, August 1976
- Sperr, P.; Braid, T. H.; Eisen, Y.
- Physical Review Letters, Vol. 37, Issue 6
Oscillations in the Excitation Function for Complete Fusion of +
journal, February 1976
- Sperr, P.; Vigdor, S.; Eisen, Y.
- Physical Review Letters, Vol. 36, Issue 8
Systematics of carbon- and oxygen-induced fusion on nuclei with
journal, October 1979
- Kovar, D. G.; Geesaman, D. F.; Braid, T. H.
- Physical Review C, Vol. 20, Issue 4
Total fusion cross section for the + system
journal, October 1978
- Tserruya, I.; Eisen, Y.; Pelte, D.
- Physical Review C, Vol. 18, Issue 4
Fusion oscillations for symmetric light heavy-ion systems
journal, December 1983
- Poffe, N.; Rowley, N.; Lindsay, R.
- Nuclear Physics A, Vol. 410, Issue 3
Structures in high-energy fusion data
journal, June 2012
- Esbensen, H.
- Physical Review C, Vol. 85, Issue 6
Fusion and compound nuclei decay for light and intermediate-mass systems: , + , + , + ,
journal, April 1982
- Gary, S.; Volant, C.
- Physical Review C, Vol. 25, Issue 4
Effects of entrance channel and compound nucleus in the fusion cross sections for Si Si, O Ca, S Si, and C Cr
journal, January 1986
- Nagashima, Y.; Schimizu, J.; Nakagawa, T.
- Physical Review C, Vol. 33, Issue 1
Search for structure in the fusion of , 30 Si and Si
journal, June 1986
- Aguilera, E. F.; Kolata, J. J.; DeYoung, P. A.
- Physical Review C, Vol. 33, Issue 6
Unexpected Behavior of Heavy-Ion Fusion Cross Sections at Extreme Sub-Barrier Energies
journal, July 2002
- Jiang, C. L.; Esbensen, H.; Rehm, K. E.
- Physical Review Letters, Vol. 89, Issue 5
Systematics of heavy-ion fusion hindrance at extreme sub-barrier energies
journal, January 2006
- Jiang, C. L.; Back, B. B.; Esbensen, H.
- Physical Review C, Vol. 73, Issue 1
Beyond the Coherent Coupled Channels Description of Nuclear Fusion
journal, November 2007
- Dasgupta, M.; Hinde, D. J.; Diaz-Torres, A.
- Physical Review Letters, Vol. 99, Issue 19
Fusion hindrance for
journal, July 2010
- Stefanini, A. M.; Montagnoli, G.; Corradi, L.
- Physical Review C, Vol. 82, Issue 1
Analysis of heavy-ion fusion reactions at extreme sub-barrier energies
journal, January 2004
- Jiang, C. L.; Esbensen, H.; Back, B. B.
- Physical Review C, Vol. 69, Issue 1
Recent developments in heavy-ion fusion reactions
journal, March 2014
- Back, B. B.; Esbensen, H.; Jiang, C. L.
- Reviews of Modern Physics, Vol. 86, Issue 1
Fusion of and other systems near and below the barrier
journal, February 2012
- Montagnoli, G.; Stefanini, A. M.; Jiang, C. L.
- Physical Review C, Vol. 85, Issue 2
Fusion of 40Ca + 96Zr revisited: Transfer couplings and hindrance far below the barrier
journal, January 2014
- Stefanini, A. M.; Montagnoli, G.; Esbensen, H.
- Physics Letters B, Vol. 728
Fusion of + : Further exploration of the effect of the positive value neutron transfer channels
journal, June 2014
- Jia, H. M.; Lin, C. J.; Yang, F.
- Physical Review C, Vol. 89, Issue 6
Hindrance of Heavy-Ion Fusion due to Nuclear Incompressibility
journal, March 2006
- Mişicu, Ş.; Esbensen, H.
- Physical Review Letters, Vol. 96, Issue 11
Signature of shallow potentials in deep sub-barrier fusion reactions
journal, March 2007
- Mişicu, Ş.; Esbensen, H.
- Physical Review C, Vol. 75, Issue 3
Signature of Smooth Transition from Sudden to Adiabatic States in Heavy-Ion Fusion Reactions at Deep Sub-Barrier Energies
journal, November 2009
- Ichikawa, Takatoshi; Hagino, Kouichi; Iwamoto, Akira
- Physical Review Letters, Vol. 103, Issue 20
Damping of quantum vibrations revealed in deep sub-barrier fusion
journal, July 2013
- Ichikawa, Takatoshi; Matsuyanagi, Kenichi
- Physical Review C, Vol. 88, Issue 1
Fusion of : Different trends at sub-barrier energies
journal, October 2014
- Montagnoli, G.; Stefanini, A. M.; Esbensen, H.
- Physical Review C, Vol. 90, Issue 4
Fusion of 28 Si + 28 Si: oscillations above the barrier and the behavior down to 1 μ b
journal, January 2014
- Stefanini, A. M.; Montagnoli, G.; Corradi, L.
- EPJ Web of Conferences, Vol. 66
Influence of Complex Surface Vibrations on the Fusion of +
journal, February 1995
- Stefanini, A. M.; Ackermann, D.; Corradi, L.
- Physical Review Letters, Vol. 74, Issue 6
Nuclear Constitution and the Interpretation of Fission Phenomena
journal, March 1953
- Hill, David Lawrence; Wheeler, John Archibald
- Physical Review, Vol. 89, Issue 5
On the “distribution of barriers” interpretation of heavy-ion fusion
journal, January 1991
- Rowley, N.; Satchler, G. R.; Stelson, P. H.
- Physics Letters B, Vol. 254, Issue 1-2
Works referencing / citing this record:
Systematic investigations of deep sub-barrier fusion reactions using an adiabatic approach
journal, December 2015
- Ichikawa, Takatoshi
- Physical Review C, Vol. 92, Issue 6
Association of molecular resonances with the oscillatory structures in nucleus–nucleus fusion cross section and its energy-weighted derivatives
journal, October 2019
- Sahu, Basudeb
- Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 11
Recent experimental results in sub- and near-barrier heavy-ion fusion reactions
journal, August 2017
- Montagnoli, Giovanna; Stefanini, Alberto M.
- The European Physical Journal A, Vol. 53, Issue 8
Systematic investigations of deep sub-barrier fusion reactions using an adiabatic approach
text, January 2015
- Ichikawa, Takatoshi
- arXiv