PreprintCC BY-NC-SA 4.0arXiv
From Superfluid Coherence to High-K Fragment Channels at Nuclear Scission
Abstract
The origin of fission-fragment spin remains unresolved. For 236U fission, we combine deformation-dependent finite-temperature pairing with a multidimensional scission-spectrum analysis. Near the pairing-quenching boundary, pair breaking exposes near-Fermi high-Ω intruder orbitals and opens high-K channels. The resulting maximum spectroscopic capacities range from a few to more than a dozen units of ℏ. Rapid neck rupture acts as a non-adiabatic projection freeze-out, where pairing serves as a dynamical gate: its critical attenuation does not generate angular momentum but allows existing high-K projections to be retained diabatically as local fragment-K components while total angular momentum remains conserved.
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BibTeX
@misc{kowal2026from,
title = {{From Superfluid Coherence to High-$K$ Fragment Channels at Nuclear Scission}},
author = {M. Kowal and A. Augustyn and T. Cap and K. Pomorski},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.11485},
eprint = {2609.11485},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.11485},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - From Superfluid Coherence to High-K Fragment Channels at Nuclear Scission
AU - M. Kowal
AU - A. Augustyn
AU - T. Cap
AU - K. Pomorski
PY - 2026
DA - 2026/09/10
PB - arXiv
DO - 10.48550/arxiv.2609.11485
UR - https://arxiv.org/abs/2609.11485
AB - The origin of fission-fragment spin remains unresolved. For ^236U fission, we combine deformation-dependent finite-temperature pairing with a multidimensional scission-spectrum analysis. Near the pairing-quenching boundary, pair breaking exposes near-Fermi high-Ω intruder orbitals and opens high-K channels. The resulting maximum spectroscopic capacities range from a few to more than a dozen units of ℏ. Rapid neck rupture acts as a non-adiabatic projection freeze-out, where pairing serves as a dynamical gate: its critical attenuation does not generate angular momentum but allows existing high-K projections to be retained diabatically as local fragment-K components while total angular momentum remains conserved.
ER -