Nucleon Correlations in Unstable Nuclei via Knockout Reactions
Abstract
We review the physical ideas and reaction theory underlying one- and two-nucleon removal from fast projectiles, quasi-free proton-induced reactions such as (p,2p) and (p,pn), and the use of exclusive momentum and coincidence observables to diagnose correlations. Particular emphasis is placed on the distinction between independent-particle occupancy, long-range collective and pairing correlations, tensor-driven neutron-proton correlations, and short-range correlations generated by the repulsive core and noncentral components of the nuclear interaction. The discussion develops the overlap-function language, spectroscopic factors, eikonal stripping and diffraction, distorted-wave impulse approximation, factorization and spectral functions, center-of-mass and recoil effects, two-nucleon amplitudes, pair densities, and the relation between measured cross sections and ab initio or shell-model structure. The well-known reduction of experimental single-particle strength relative to simple shell-model expectations, its dependence on separation-energy asymmetry, and the continuing debate over reaction-model systematics are treated in detail.
Related
- Probing the Size of Neutron and Proton Single-Particle Orbitals from Nucleon Knockout Reactions
- Insights into the Angular Momentum of Compound Nuclei Populated in Fragmentation-Induced Fission Reactions of 238U
- Implications of relativistic corrections on high-momentum nucleon-transfer reactions
- Local-nuclear-density dependent calculation of nucleon electromagnetic form factor ratios in finite nuclei
- Letter of Intent for Alpha Knockout from Nuclei in Hard Exclusive Processes with ALERT
BibTeX
@misc{bertulani2026nucleon,
title = {{Nucleon Correlations in Unstable Nuclei via Knockout Reactions}},
author = {C. A. Bertulani},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.06216},
eprint = {2609.06216},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.06216},
}
RIS
TY - UNPB
TI - Nucleon Correlations in Unstable Nuclei via Knockout Reactions
AU - C. A. Bertulani
PY - 2026
DA - 2026/09/05
PB - arXiv
DO - 10.48550/arxiv.2609.06216
UR - https://arxiv.org/abs/2609.06216
AB - We review the physical ideas and reaction theory underlying one- and two-nucleon removal from fast projectiles, quasi-free proton-induced reactions such as (p,2p) and (p,pn), and the use of exclusive momentum and coincidence observables to diagnose correlations. Particular emphasis is placed on the distinction between independent-particle occupancy, long-range collective and pairing correlations, tensor-driven neutron-proton correlations, and short-range correlations generated by the repulsive core and noncentral components of the nuclear interaction. The discussion develops the overlap-function language, spectroscopic factors, eikonal stripping and diffraction, distorted-wave impulse approximation, factorization and spectral functions, center-of-mass and recoil effects, two-nucleon amplitudes, pair densities, and the relation between measured cross sections and ab initio or shell-model structure. The well-known reduction of experimental single-particle strength relative to simple shell-model expectations, its dependence on separation-energy asymmetry, and the continuing debate over reaction-model systematics are treated in detail.
ER -