Observation of oscillations and near-barrier suppression in the fusion of $^{20}$O + p
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914130885083136 |
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| author | Desilets, H. Kumar, Rohit deSouza, R. T. Hudan, S. Ciampi, C. Chbihi, A. Brown, K. W. Singh, Varinderjit Pinheiro, B. Ferreira, J. L. Lubian, J. |
| author_facet | Desilets, H. Kumar, Rohit deSouza, R. T. Hudan, S. Ciampi, C. Chbihi, A. Brown, K. W. Singh, Varinderjit Pinheiro, B. Ferreira, J. L. Lubian, J. |
| contents | Using an active target detector, the fusion excitation function for $^{20}$O + $^1$H was measured for the first time. Near the barrier, the fusion cross section manifests an oscillatory behavior with broad peaks $\sim$50-100 keV wide. The presence of these peaks likely reflects the low density of low-angular-momentum states in the quasibound regime. R-matrix coupled channel (CC) calculations that include the first excited 2$^+$ state in $^{20}$O are able to reproduce the observed oscillations. However, one channel CC calculations fail to reproduce the decrease in the sub-barrier cross section experimentally observed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_01076 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of oscillations and near-barrier suppression in the fusion of $^{20}$O + p Desilets, H. Kumar, Rohit deSouza, R. T. Hudan, S. Ciampi, C. Chbihi, A. Brown, K. W. Singh, Varinderjit Pinheiro, B. Ferreira, J. L. Lubian, J. Nuclear Experiment Using an active target detector, the fusion excitation function for $^{20}$O + $^1$H was measured for the first time. Near the barrier, the fusion cross section manifests an oscillatory behavior with broad peaks $\sim$50-100 keV wide. The presence of these peaks likely reflects the low density of low-angular-momentum states in the quasibound regime. R-matrix coupled channel (CC) calculations that include the first excited 2$^+$ state in $^{20}$O are able to reproduce the observed oscillations. However, one channel CC calculations fail to reproduce the decrease in the sub-barrier cross section experimentally observed. |
| title | Observation of oscillations and near-barrier suppression in the fusion of $^{20}$O + p |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2511.01076 |