Fluctuations of Nuclear Cross Sections in the "Continuum" Region

Ericson, T.E.O.

doi:10.1103/physrevlett.5.430

Cited by 309 publications

(209 citation statements)

References 1 publication

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“…The critical dimensions of the HPGe crystal were measured with a CT scan of the detector [37]. Past studies of the HPGe detector have included extensive geant simulations comparing experimentally measured and simulated γ-ray spectra of radioactive sources including 60 Co, 56 Co, and 137 Cs as well as (p,γ) resonances in 14 N, 18 O, 23 Na, and 27 Al target nuclei [17,34,38]. Comparisons similar to those carried out for the HPGe have been completed for the NaI using 60 Co, the 151-keV resonance in the 18 O(p,γ) 19 F reaction [35], and both resonant and DC spectra from the 17 O(p,γ) 18 F reaction [32].…”

Section: B Detectorsmentioning

confidence: 99%

New measurements of low-energy resonances in theNe22(p,γ)Na23reaction

et al. 2017

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The 22 Ne(p,γ) 23 Na reaction is one of the most uncertain reactions in the NeNa cycle and plays a crucial role in the creation of 23 Na, the only stable Na isotope. Uncertainties in the low-energy rates of this and other reactions in the NeNa cycle lead to ambiguities in the nucleosynthesis predicted from models of thermally pulsing AGB stars. This in turn complicates the interpretation of anomalous Na-O trends in globular cluster evolutionary scenarios. (2015) and is attributed to the interplay between the 23 Na(p,α) 20 Ne and 20 Ne(p,γ) 21 Na reactions, both of which remain fairly uncertain at the relevant temperature range.

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Section: B Detectorsmentioning

confidence: 99%

New measurements of low-energy resonances in theNe22(p,γ)Na23reaction

et al. 2017

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“…A more stringent measure of the nature of these fluctuating observables can be best quantified with the aid of the correlation function. The resulting function is Lorentzian in shape as demonstrated by Ericson [2]. Consider the conductance in QDs.…”

Section: Ericson Fluctuationsmentioning

confidence: 99%

“…Further, the case of overlapping resonances requires the study of the correlation function in order to obtain information about the lifetime of the compound nucleus. The resulting theory of the compound nucleus hinges on the Hauser-Feshbach expression for the average cross section [1] and the Ericson correlation function [2]. There is a vast body of literature on compound nucleus theory.…”

Section: Introductionmentioning

confidence: 99%

Chaotic behavior of the Compound Nucleus, open Quantum Dots and other nanostructures

Hussein

Ramos

2014

EPJ Web of Conferences

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Abstract. It is well established that physical systems exhibit both ordered and chaotic behavior. The chaotic behavior of nanostructures such as open quantum dots has been confirmed experimentally and discussed exhaustively theoretically. This is manifested through random fluctuations in the electronic conductance. What useful information can be extracted from this noise in the conductance? In this contribution we shall address this question. In particular, we will show that the average maxima density in the conductance is directly related to the correlation function whose characteristic width is a measure of the energy-or applied magnetic field-correlation length. The idea behind the above was originally discovered in the context of the atomic nucleus, a mesoscopic system. Our findings are directly applicable to graphene.

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“…At the same time Ericson [150,151,230] introduced the cross section correlation function as a measure of the degree of coherence in the otherwise chaotic nuclear system. Through an analysis of the correlation function or the average density of maxima [230] one is able to extract the correlation width, which had been previously estimated by Weisskopf to be…”

Section: F Quantum Chaotic Scatteringmentioning

confidence: 99%

“…The treatment of this issue relies on the use of assumed random properties of the P − Q couplings and the whole apparatus of quantum chaotic scattering theory is employed. The Hauser-Feshbach cross section and the Ericson correlation function [150,151] are then obtained, making the above theory a complete one.…”

Section: Feshbach's Theorymentioning

confidence: 99%

Current Status of Nuclear Physics Research

Bertulani

Hussein

2015

Braz J Phys

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In this review we discuss the current status of research in nuclear physics which is being carried out in different centers in the World. For this purpose we supply a short account of the development in the area which evolved over the last 9 decades, since the discovery of the neutron. The evolution of the physics of the atomic nucleus went through many stages as more data become available. We briefly discuss models introduced to discern the physics behind the experimental discoveries, such as the shell model, the collective model, the statistical model, the interacting boson model, etc., some of these models may be seemingly in conflict with each other, but this was shown to be only apparent.The richness of the ideas and abundance of theoretical models attests to the important fact that the nucleus is a really singular system in the sense that it evolves from two-body bound states such as the deuteron, to few-body bound states, such as 4 He, 7 Li, 9 Be etc. and up the ladder to heavier bound nuclei containing up to more than 200 nucleons. Clearly statistical mechanics, usually employed in systems with very large number of particles, would seemingly not work for such finite systems as the nuclei, neither do other theories which are applicable to condensed matter. The richness of nuclear physics stems from these restrictions. New theories and models are presently being developed. Theories of the structure and reactions of neutron-rich and proton-rich nuclei, called exotic nuclei, halo nuclei, or Borromean nuclei, deal with the wealth of experimental data that became available in the last 35 years. Further, nuclear astrophysics and stellar and Big Bang nucleosynthesis have become a more mature subject. Due to limited space, this review only covers a few selected topics, mainly those with which the authors have worked on. Our aimed potential readers of this review are nuclear physicists and physicists in other areas, as well as graduate students interested in pursuing a career in nuclear physics.

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Fluctuations of Nuclear Cross Sections in the "Continuum" Region

Cited by 309 publications

References 1 publication

New measurements of low-energy resonances in theNe22(p,γ)Na23reaction

New measurements of low-energy resonances in theNe22(p,γ)Na23reaction

Chaotic behavior of the Compound Nucleus, open Quantum Dots and other nanostructures

Current Status of Nuclear Physics Research

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