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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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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 |
| _version_ | 1828941478473236480 |
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| author | Hinde D. J. Simenel C. Evers M. Dasgupta M. |
| author_facet | Hinde D. J. Simenel C. Evers M. Dasgupta M. |
| author_sort | Hinde D. J. |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-14T03:36:51Z |
| format | Article |
| id | doaj.art-4102905c0dca441e96c1710dfb7c5637 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T03:36:51Z |
| publishDate | 2012-10-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-4102905c0dca441e96c1710dfb7c56372022-12-21T23:18:35ZengEDP 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 |
| 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 |
| title | 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_short | 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 |
| url | http://dx.doi.org/10.1051/epjconf/20123505005 |
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