Are breakup reactions sensitive to spectroscopic factors? (Spoiler alert: they ain't)

Abstract

Halo nuclei are mostly studied through reactions. In breakup reactions, the projectile is sent upon a target, which induces the dissociation of the loosely-bound halo from the core of the nucleus. In most cases, a spectroscopic factor for the core-halo structure is inferred from experimental data. In this contribution, we present a new analysis of the Coulomb breakup of 11Be on 208Pb at 69A MeV measured at RIKEN. We use an effective multi-channel particle-rotor model of the projectile, which accounts for the excitation of the 10Be core. The calculations are in excellent agreement with the data, independently of the value of the spectroscopic factor. This confirms that breakup cross sections are insensitive to this value and that spectroscopic factors cannot be inferred from such measurements. In the near future, we plan to extend this idea to other reactions.

Factorization in quasi-free breakup reactions with two bodies left behind
Raúl A. Briceño, Caroline S. R. Costa, Hans-Werner Hammer +1
arXiv26 Oct 2026PreprintarXiv licenceFull textHigh-energy & particle physics Nuclear physicsarXiv
Evolution of Spectroscopic Factors in Neutron-deficient p-shell Nuclei in connection with Short-Range Correlations
S Koyama, D Suzuki, O Sorlin +31
HAL7 Sep 2026PreprintarXiv licenceFull textNuclear physicsHALarXiv
Role of Metastable Dicationic Intermediates in the Breakup of CH₄²⁺
Samiksha Dehru, Evan Munaro-Langloÿs, Aditya Yadav +8
arxiv.org17 Sep 2026PreprintLicence not statedFull textAtomic, molecular & optical physicsHAL
Bayesian analysis of the Coulomb breakup of C19
Quentin Bozet, Pierre Capel, Isak Svensson
arXiv23 Oct 2026PreprintCC BY 4.0Full textNuclear physicsarXiv
Femtosecond laser-induced cavitation seeds liquid-jet breakup beyond the Rayleigh-Plateau stability limit
Sourabh Singh, Tamanna, S. Sree Harsha +1
arXiv1 Oct 2026PreprintarXiv licenceFull textFluid dynamics Optics & photonicsarXiv

Cite

BibTeX RIS

BibTeX

@misc{kubushishi2026breakup,
  title = {{Are breakup reactions sensitive to spectroscopic factors? (Spoiler alert: they ain't)}},
  author = {Live-Palm Kubushishi and Pierre Capel},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.39743},
  eprint = {2609.39743},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.39743},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Are breakup reactions sensitive to spectroscopic factors? (Spoiler alert: they ain't)
AU  - Live-Palm Kubushishi
AU  - Pierre Capel
PY  - 2026
DA  - 2026/09/30
PB  - arXiv
DO  - 10.48550/arxiv.2609.39743
UR  - https://arxiv.org/abs/2609.39743
AB  - Halo nuclei are mostly studied through reactions. In breakup reactions, the projectile is sent upon a target, which induces the dissociation of the loosely-bound halo from the core of the nucleus. In most cases, a spectroscopic factor for the core-halo structure is inferred from experimental data. In this contribution, we present a new analysis of the Coulomb breakup of 11Be on 208Pb at 69A MeV measured at RIKEN. We use an effective multi-channel particle-rotor model of the projectile, which accounts for the excitation of the 10Be core. The calculations are in excellent agreement with the data, independently of the value of the spectroscopic factor. This confirms that breakup cross sections are insensitive to this value and that spectroscopic factors cannot be inferred from such measurements. In the near future, we plan to extend this idea to other reactions.
ER  -

Abstract

Related

Cite