Fluctuations of the second order observables for dissipative processes in 19F+27Al system

Berceanu, I.; Andronic, A.; Dūma, M.; Moisă, D.; Petrovici, M.; Pop, A.; Simion, V.; Zoppo, A. Del; D’Erasmo, G.; Immé, G.; Lanzanó, G.; Pagano, A.; Pantaleo, A.; Raciti, G.

doi:10.1007/s12043-999-0008-9

Cited by 3 publications

(1 citation statement)

References 9 publications

(7 reference statements)

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“…[109], [110], [111], [112], [113]). The experiments firmly established exit channel correlation which manifests itself in non-self-averaging of oscillations in the excitation functions.…”

Section: Discussionmentioning

confidence: 99%

Thermalized Non-Equilibrated Matter against Random Matrix Theory, Quantum Chaos and Direct Interaction: Warming up

Kun¹,

Zhao²,

Huang³

et al. 2013

Preprint

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We discuss a number of the nuclear reaction data sets for low energy proton emission. Strong forward peaking persists up to the lowest emission energies corresponding to the evaporation domain of the spectra. The conventional understanding of the forward peaking requires significant contribution of direct interaction. Yet, for heavy target nuclei, modern theories predict a diminishing contribution of direct reactions for the typically evaporation part of the spectra. The idea of a thermalized non-equilibrated state of matter offers a conceptually new understanding of the strong angular asymmetry. In this compact review we present some clarifications, corrections and further developments of the approach, and provide a brief account of results previously discussed but not reported in the literature. The cross symmetry compound nucleus S-matrix correlations are obtained (i) starting from the unitary S-matrix representation, (ii) by explicitly taking into account a process of energy equilibration, and (iii) without taking the thermodynamic limit of an infinite number of particles in the thermalized system. It is conjectured that the long phase memory is due to the exponentially small total spin off-diagonal resonance intensity correlations. This manifestly implies that the strong angular asymmetry intimately relates to extremely small deviations of the eigenfunction distribution from Gaussian law. The spin diagonal resonance intensity correlations determine a new time/energy scale for a validity of random matrix theory. Its definition does not involve overlaps of the many-body interacting configurations with shell model non-interacting states and thus is conceptually different from the physical meaning (inverse energy relaxation time) of the spreading widths introduced by Wigner. Exact Gaussian distribution of the resonance wave functions corresponds to the instantaneous phase relaxation. We invite the nuclear reaction community for the competition to describe, as the first challenge, the strong forward peaking in the typically evaporation part of the proton spectra. This is necessary to initiate revealing long-term misconduct in the heavily cross-disciplinary field, also important for nuclear industry applications.

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“…[109], [110], [111], [112], [113]). The experiments firmly established exit channel correlation which manifests itself in non-self-averaging of oscillations in the excitation functions.…”

Section: Discussionmentioning

confidence: 99%

Thermalized Non-Equilibrated Matter against Random Matrix Theory, Quantum Chaos and Direct Interaction: Warming up

Kun¹,

Zhao²,

Huang³

et al. 2013

Preprint

View full text Add to dashboard Cite

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Quantum-classical correspondence in microscopic and mesoscopic complex collisions

2000

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We propose a novel method to study quantum-classical correspondence in complex, e.g., heavy-ion, atomic, molecular, and atomic cluster collisions. The many-body rotating wave packets are formed spontaneously and their stability is due to the slow decoherence between highly excited strongly overlapping states of the intermediate complex. The phenomenon is illustrated by analyzing the 12 Cϩ 24 Mg collision. The significant deviations from the random-matrix theory are reproduced in terms of the macroscopically rotating molecule formed in this collision.

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Sensitivity of Nucleus-Nucleus Cross Sections and Atomic-Electron Effects in Dissipative Heavy-Ion Collisions

Kun

2000

Phys. Rev. Lett.

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We argue that spontaneous microchannel S-matrix correlations and slow spin decoherence result in a sensitivity of the cross sections for strongly dissipative heavy-ion collisions to an arbitrarily small perturbation. Such a sensitivity implies that atomic electrons should influence energetic ( approximately 100 MeV) heavy-ion reactions. The atomic-electron effects are predicted to be approximately 100% of the magnitude of the non-self-averaged oscillating component of the nucleus-nucleus cross sections.

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Fluctuations of the second order observables for dissipative processes in 19F+27Al system

Cited by 3 publications

References 9 publications

Thermalized Non-Equilibrated Matter against Random Matrix Theory, Quantum Chaos and Direct Interaction: Warming up

Thermalized Non-Equilibrated Matter against Random Matrix Theory, Quantum Chaos and Direct Interaction: Warming up

Quantum-classical correspondence in microscopic and mesoscopic complex collisions

Sensitivity of Nucleus-Nucleus Cross Sections and Atomic-Electron Effects in Dissipative Heavy-Ion Collisions

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