Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion
A detailed analysis of the projectile-like fragments detected at backward angles in the reactions 16O, 32S+208Pb at energies below the fusion barrier is presented. Excitation functions corresponding to nucleon transfer with ΔZ = 1 and ΔZ = 2 were extracted, indicating surprisingly large absolute pro...
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EDP Sciences
2012-10-01
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Series: | EPJ Web of Conferences |
Online Access: | http://dx.doi.org/10.1051/epjconf/20123505005 |
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doaj-4102905c0dca441e96c1710dfb7c56372021-08-02T03:11:24ZengEDP SciencesEPJ Web of Conferences2100-014X2012-10-01350500510.1051/epjconf/20123505005Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusionHinde D. J.Simenel C.Evers M.Dasgupta M.A detailed analysis of the projectile-like fragments detected at backward angles in the reactions 16O, 32S+208Pb at energies below the fusion barrier is presented. Excitation functions corresponding to nucleon transfer with ΔZ = 1 and ΔZ = 2 were extracted, indicating surprisingly large absolute probabilities at sub-barrier energies. A comparison of 2p transfer probabilities with time-dependent Hartree-Fock calculations suggests strong pairing correlations between the two protons. Excitation energies in the projectile-like fragments up to ~ 15MeV for the 16O and ~ 25MeV for 32S-induced reactions demonstrate the population of highly excited states in the residual nuclei, indicating substantial dissipation of kinetic energy. These highly inelastic (large excitation energies) and complex (correlated few-nucleon transfer) processes may be closely related to the depletion of fusion through tunnelling at sub-barrier energies. http://dx.doi.org/10.1051/epjconf/20123505005 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hinde D. J. Simenel C. Evers M. Dasgupta M. |
spellingShingle |
Hinde D. J. Simenel C. Evers M. Dasgupta M. Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion EPJ Web of Conferences |
author_facet |
Hinde D. J. Simenel C. Evers M. Dasgupta M. |
author_sort |
Hinde D. J. |
title |
Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion |
title_short |
Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion |
title_full |
Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion |
title_fullStr |
Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion |
title_full_unstemmed |
Sub-barrier transfer in 16O+208Pb and 32S+208Pb and its role in understanding the suppression of fusion |
title_sort |
sub-barrier transfer in 16o+208pb and 32s+208pb and its role in understanding the suppression of fusion |
publisher |
EDP Sciences |
series |
EPJ Web of Conferences |
issn |
2100-014X |
publishDate |
2012-10-01 |
description |
A detailed analysis of the projectile-like fragments detected at backward angles in the reactions 16O, 32S+208Pb at energies below the fusion barrier is presented. Excitation functions corresponding to nucleon transfer with ΔZ = 1 and ΔZ = 2 were extracted, indicating surprisingly large absolute probabilities at sub-barrier energies. A comparison of 2p transfer probabilities with time-dependent Hartree-Fock calculations suggests strong pairing correlations between the two protons. Excitation energies in the projectile-like fragments up to ~ 15MeV for the 16O and ~ 25MeV for 32S-induced reactions demonstrate the population of highly excited states in the residual nuclei, indicating substantial dissipation of kinetic energy. These highly inelastic (large excitation energies) and complex (correlated few-nucleon transfer) processes may be closely related to the depletion of fusion through tunnelling at sub-barrier energies. |
url |
http://dx.doi.org/10.1051/epjconf/20123505005 |
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