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PreprintCC BY-NC-SA 4.0arXiv

Comparing the fusion of 19O and 20O ions with protons at near barrier energies

  • Rohit Kumar
  • H. Desilets
  • R. T. deSouza
  • S. Hudan
  • C. Ciampi
  • A. Chbihi
  • K. W. Brown
  • B. Pinheiro
  • J. Lubian
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Abstract

Proton capture on 19,20O nuclei was measured in inverse kinematics with the active-target detector MuSIC@Indiana using CH4 as the target gas. Direct measurement of the (p,n) cross section was enabled by the intrinsically high efficiency and self-normalizing nature of the measurement. The excitation function of both (p,n) reactions exhibits an oscillatory behavior. For the neutron-rich nuclei studied, determining the (p,n) cross section provides access to the proton fusion cross section because the proton's de Broglie wavelength is much larger than that of the heavy ion. A significant suppression of the cross section in 19O compared to 20O is observed, suggesting level-density differences. While the coupled channel calculations reproduce the oscillatory behavior observed in the case of 20O, they fail to predict the oscillatory behavior observed in 19O or the overall suppression of the fusion cross section.

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Cite

BibTeXRIS
BibTeX
@misc{kumar2026comparing,
  title = {{Comparing the fusion of $^19$O and $^20$O ions with protons at near barrier energies}},
  author = {Rohit Kumar and H. Desilets and R. T. deSouza and S. Hudan and C. Ciampi and A. Chbihi and K. W. Brown and B. Pinheiro and J. Lubian},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.00372},
  eprint = {2611.00372},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.00372},
  note = {CC BY-NC-SA 4.0},
}
RIS
TY  - UNPB
TI  - Comparing the fusion of ^19O and ^20O ions with protons at near barrier energies
AU  - Rohit Kumar
AU  - H. Desilets
AU  - R. T. deSouza
AU  - S. Hudan
AU  - C. Ciampi
AU  - A. Chbihi
AU  - K. W. Brown
AU  - B. Pinheiro
AU  - J. Lubian
PY  - 2026
DA  - 2026/11/01
PB  - arXiv
DO  - 10.48550/arxiv.2611.00372
UR  - https://arxiv.org/abs/2611.00372
AB  - Proton capture on ^19,20O nuclei was measured in inverse kinematics with the active-target detector MuSIC@Indiana using CH_4 as the target gas. Direct measurement of the (p,n) cross section was enabled by the intrinsically high efficiency and self-normalizing nature of the measurement. The excitation function of both (p,n) reactions exhibits an oscillatory behavior. For the neutron-rich nuclei studied, determining the (p,n) cross section provides access to the proton fusion cross section because the proton's de Broglie wavelength is much larger than that of the heavy ion. A significant suppression of the cross section in ^19O compared to ^20O is observed, suggesting level-density differences. While the coupled channel calculations reproduce the oscillatory behavior observed in the case of ^20O, they fail to predict the oscillatory behavior observed in ^19O or the overall suppression of the fusion cross section.
ER  -