Systematics of heavy-ion fusion reactions at extreme sub-barrier energies

C. L. Jiang; H. Esbensen; K. E. Rehm; B. B. Back; R. V.F. Janssens; C. N. Davids; J. P. Greene; D. J. Henderson; G. Mukherjee; R. C. Pardo; T. O. Pennington; D. Seweryniak; S. Sinha; Z. Zhou; M. Paul; P. Collon; J. A. Caggiano; A. M. Heinz; I. Nishinaka

doi:10.1143/PTPS.154.61

Systematics of heavy-ion fusion reactions at extreme sub-barrier energies

C. L. Jiang^*, H. Esbensen, K. E. Rehm, B. B. Back, R. V.F. Janssens, C. N. Davids, J. P. Greene, D. J. Henderson, G. Mukherjee, R. C. Pardo, T. O. Pennington, D. Seweryniak, S. Sinha, Z. Zhou, M. Paul, P. Collon, J. A. Caggiano, A. M. Heinz, I. Nishinaka

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A new measurement of fusion reactions down to 10 nb has been performed for the system ⁶⁴Ni + ⁶⁴Ni. Coupled-channels analyses have been carried out for the systems ⁶⁰Ni + ⁸⁹Y and ⁶⁴Ni + ⁶⁴Ni. They demonstrate that coupled-channels calculations are unable to reproduce the unexpected steep falloff of the cross sections at extreme sub-barrier energies. Heavy-ion fusion excitation functions are also analyzed in terms of the S factor, as this offers a pragmatic way to study fusion behavior in the energy regime of interest. It is shown that the steep falloff in cross section observed in several heavy-ion systems translates into a maximum of the S factor. The energies where the maximum occurs can be parameterized with a simple empirical formula. The parameterization, which is derived here for rather stiff heavy-ion systems, provides also an upper limit for reactions involving softer nuclei.

Original language	English
Pages (from-to)	61-68
Number of pages	8
Journal	Progress of Theoretical Physics Supplement
Volume	154
DOIs	https://doi.org/10.1143/PTPS.154.61
State	Published - 2004

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Jiang, C. L., Esbensen, H., Rehm, K. E., Back, B. B., Janssens, R. V. F., Davids, C. N., Greene, J. P., Henderson, D. J., Mukherjee, G., Pardo, R. C., Pennington, T. O., Seweryniak, D., Sinha, S., Zhou, Z., Paul, M., Collon, P., Caggiano, J. A., Heinz, A. M., & Nishinaka, I. (2004). Systematics of heavy-ion fusion reactions at extreme sub-barrier energies. Progress of Theoretical Physics Supplement, 154, 61-68. https://doi.org/10.1143/PTPS.154.61

@article{ea5608d6b89b4ee59e04d2e272c16a95,

title = "Systematics of heavy-ion fusion reactions at extreme sub-barrier energies",

abstract = "A new measurement of fusion reactions down to 10 nb has been performed for the system 64Ni + 64Ni. Coupled-channels analyses have been carried out for the systems 60Ni + 89Y and 64Ni + 64Ni. They demonstrate that coupled-channels calculations are unable to reproduce the unexpected steep falloff of the cross sections at extreme sub-barrier energies. Heavy-ion fusion excitation functions are also analyzed in terms of the S factor, as this offers a pragmatic way to study fusion behavior in the energy regime of interest. It is shown that the steep falloff in cross section observed in several heavy-ion systems translates into a maximum of the S factor. The energies where the maximum occurs can be parameterized with a simple empirical formula. The parameterization, which is derived here for rather stiff heavy-ion systems, provides also an upper limit for reactions involving softer nuclei.",

author = "Jiang, {C. L.} and H. Esbensen and Rehm, {K. E.} and Back, {B. B.} and Janssens, {R. V.F.} and Davids, {C. N.} and Greene, {J. P.} and Henderson, {D. J.} and G. Mukherjee and Pardo, {R. C.} and Pennington, {T. O.} and D. Seweryniak and S. Sinha and Z. Zhou and M. Paul and P. Collon and Caggiano, {J. A.} and Heinz, {A. M.} and I. Nishinaka",

year = "2004",

doi = "10.1143/PTPS.154.61",

language = "אנגלית",

volume = "154",

pages = "61--68",

journal = "Progress of Theoretical Physics Supplement",

issn = "0375-9687",

publisher = "Yukawa Institute for Theoretical Physics",

}

Jiang, CL, Esbensen, H, Rehm, KE, Back, BB, Janssens, RVF, Davids, CN, Greene, JP, Henderson, DJ, Mukherjee, G, Pardo, RC, Pennington, TO, Seweryniak, D, Sinha, S, Zhou, Z, Paul, M, Collon, P, Caggiano, JA, Heinz, AM & Nishinaka, I 2004, 'Systematics of heavy-ion fusion reactions at extreme sub-barrier energies', Progress of Theoretical Physics Supplement, vol. 154, pp. 61-68. https://doi.org/10.1143/PTPS.154.61

TY - JOUR

T1 - Systematics of heavy-ion fusion reactions at extreme sub-barrier energies

AU - Jiang, C. L.

AU - Esbensen, H.

AU - Rehm, K. E.

AU - Back, B. B.

AU - Janssens, R. V.F.

AU - Davids, C. N.

AU - Greene, J. P.

AU - Henderson, D. J.

AU - Mukherjee, G.

AU - Pardo, R. C.

AU - Pennington, T. O.

AU - Seweryniak, D.

AU - Sinha, S.

AU - Zhou, Z.

AU - Paul, M.

AU - Collon, P.

AU - Caggiano, J. A.

AU - Heinz, A. M.

AU - Nishinaka, I.

PY - 2004

Y1 - 2004

N2 - A new measurement of fusion reactions down to 10 nb has been performed for the system 64Ni + 64Ni. Coupled-channels analyses have been carried out for the systems 60Ni + 89Y and 64Ni + 64Ni. They demonstrate that coupled-channels calculations are unable to reproduce the unexpected steep falloff of the cross sections at extreme sub-barrier energies. Heavy-ion fusion excitation functions are also analyzed in terms of the S factor, as this offers a pragmatic way to study fusion behavior in the energy regime of interest. It is shown that the steep falloff in cross section observed in several heavy-ion systems translates into a maximum of the S factor. The energies where the maximum occurs can be parameterized with a simple empirical formula. The parameterization, which is derived here for rather stiff heavy-ion systems, provides also an upper limit for reactions involving softer nuclei.

AB - A new measurement of fusion reactions down to 10 nb has been performed for the system 64Ni + 64Ni. Coupled-channels analyses have been carried out for the systems 60Ni + 89Y and 64Ni + 64Ni. They demonstrate that coupled-channels calculations are unable to reproduce the unexpected steep falloff of the cross sections at extreme sub-barrier energies. Heavy-ion fusion excitation functions are also analyzed in terms of the S factor, as this offers a pragmatic way to study fusion behavior in the energy regime of interest. It is shown that the steep falloff in cross section observed in several heavy-ion systems translates into a maximum of the S factor. The energies where the maximum occurs can be parameterized with a simple empirical formula. The parameterization, which is derived here for rather stiff heavy-ion systems, provides also an upper limit for reactions involving softer nuclei.

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ER -

Systematics of heavy-ion fusion reactions at extreme sub-barrier energies

Abstract

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