Near-threshold dipole strength in {^{10}}Be with isoscalar character
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Chen, J. Ayyad, Y. Bazin, D. Mittig, W. Serikow, M. Z. Keeley, N. Wang, S. M. Zhou, B. Zamora, J. C. Beceiro-Novo, S. Cortesi, M. DeNudt, M. Heinitz, S. Giraud, S. Gueye, P. Hoffman, C. R. Kay, B. P. Maugeri, E. A. Monteagudo, B. G. Li, H. Liu, W. P. Munoz, A. Ndayisabye, F. Pereira, J. Rijal, N. Santamaria, C. Schumann, D. Watwood, N. Votta, G. Yin, P. Yuan, C. X. Zhang, Y. N. |
| author_facet | Chen, J. Ayyad, Y. Bazin, D. Mittig, W. Serikow, M. Z. Keeley, N. Wang, S. M. Zhou, B. Zamora, J. C. Beceiro-Novo, S. Cortesi, M. DeNudt, M. Heinitz, S. Giraud, S. Gueye, P. Hoffman, C. R. Kay, B. P. Maugeri, E. A. Monteagudo, B. G. Li, H. Liu, W. P. Munoz, A. Ndayisabye, F. Pereira, J. Rijal, N. Santamaria, C. Schumann, D. Watwood, N. Votta, G. Yin, P. Yuan, C. X. Zhang, Y. N. |
| contents | Isoscalar dipole transitions are a distinctive fingerprint of cluster structures. A {1^-} resonance at 7.27(10) MeV, located just below the α-emission threshold, has been observed in the deuteron inelastic scattering reactions off 10Be. The deformation lengths of the excited states in 10Be below 9 MeV have been inferred from the differential cross sections using coupled channel calculations. This observed {1^-} resonance has isoscalar characteristics and exhausts approximately 5{\%}-15{\%} of the isoscalar dipole energy-weighted sum rule, providing evidence for pronounced α cluster structure in 10Be. The Gamow coupled channel approach supports this interpretation and suggests the near-threshold effect might be playing an important role in this excitation energy domain. The α+α+n+n four-body calculation reproduces the observed enhanced dipole strength, implying that the four-body cluster structure is essential to describe the {1^-} states in 10Be. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_05231 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Near-threshold dipole strength in {^{10}}Be with isoscalar character Chen, J. Ayyad, Y. Bazin, D. Mittig, W. Serikow, M. Z. Keeley, N. Wang, S. M. Zhou, B. Zamora, J. C. Beceiro-Novo, S. Cortesi, M. DeNudt, M. Heinitz, S. Giraud, S. Gueye, P. Hoffman, C. R. Kay, B. P. Maugeri, E. A. Monteagudo, B. G. Li, H. Liu, W. P. Munoz, A. Ndayisabye, F. Pereira, J. Rijal, N. Santamaria, C. Schumann, D. Watwood, N. Votta, G. Yin, P. Yuan, C. X. Zhang, Y. N. Nuclear Experiment Nuclear Theory Isoscalar dipole transitions are a distinctive fingerprint of cluster structures. A {1^-} resonance at 7.27(10) MeV, located just below the α-emission threshold, has been observed in the deuteron inelastic scattering reactions off 10Be. The deformation lengths of the excited states in 10Be below 9 MeV have been inferred from the differential cross sections using coupled channel calculations. This observed {1^-} resonance has isoscalar characteristics and exhausts approximately 5{\%}-15{\%} of the isoscalar dipole energy-weighted sum rule, providing evidence for pronounced α cluster structure in 10Be. The Gamow coupled channel approach supports this interpretation and suggests the near-threshold effect might be playing an important role in this excitation energy domain. The α+α+n+n four-body calculation reproduces the observed enhanced dipole strength, implying that the four-body cluster structure is essential to describe the {1^-} states in 10Be. |
| title | Near-threshold dipole strength in {^{10}}Be with isoscalar character |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2501.05231 |