Year: 2026
Type: preprint
Abstract: The sharing of particles and energy between entangled fission fragments is known to contribute considerably to final observable distributions. This work unravels this sharing mechanism at finite excitations, which exhibits an intriguing quantum-thermal interplay relevant to long-standing open questions in induced fission. We formulate a thermal double particle-number projection onto spatial subspaces, using the Balian-Brezin representation and Grassmann integrals, to derive the projected partition function and observables. Based on finite-temperature dynamical fission calculations of 240Pu, the formalism explains the puzzling energy dependence of odd-even staggering in charge yields and of sawtooth neutron multiplicities. The present framework also provides a general projection tool for probing entangled thermal many-body systems.
Source: arXiv (Cornell University)
Authors: Chen, J. W., Li, S. C., Qiang, Y., Pei, J. C.
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G2081971988, G3534781906
OpenAlex ID: W7223145180