RPA instabilities in finite nuclei at low density

Download

index.pdf

Date

1997-05-12

Author

Jacquot, B
Colonna, M
Ayik, S
Chomaz, P

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

137
views

137
downloads

Early development of the instabilities in a dilute nuclear source is investigated using a finite temperature quantal RPA approach for different systems, The growth rates of the unstable collective modes are determined by solving a dispersion relation, which is obtained by parametrizing the transition density in terms of its multipole moments. Under typical conditions of a dilute finite system at moderate temperatures the dispersion relation exhibits an ultraviolet cut-off. As a result, only a finite number of multipole modes becomes unstable, and the number of the unstable collective modes increases with the size of the source. Calculations indicate that for an expanding source, unstable modes show a transition from surface to volume character. (C) 1997 Published by Elsevier Science B.V.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/67435

Journal

NUCLEAR PHYSICS A

DOI

https://doi.org/10.1016/s0375-9474(97)00049-3

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Investigations of spinodal dynamics in asymmetric nuclear matter within a stochastic relativistic model Yılmaz, Osman; ACAR, FERİDE PINAR; Saatci, S.; GÖKALP, AHMET (Springer Science and Business Media LLC, 2013-03-01) Early development of spinodal instabilities and density correlation functions in asymmetric nuclear matter are investigated in the stochastic extension of the Walecka-type relativistic mean field including coupling with rho meson. Calculations are performed under typical conditions encountered in heavy-ion collisions and in the crusts of neutron stars. In general, growth of instabilities occur relatively slower for increasing charge asymmetry of matter. At higher densities around rho = 0.4 rho(0) fluctuatio...
Study of Z boson production in pPb collisions at root S-NN=5.02 TeV Khachatryan, V.; et. al. (Elsevier BV, 2016-08-01) The production of Z bosons in pPb collisions at root S-NN = 5.02 TeV is studied by the CMS experiment via the electron and muon decay channels. The inclusive cross section is compared to pp collision predictions, and found to scale with the number of elementary nucleon-nucleon collisions. The differential cross sections as a function of the Z boson rapidity and transverse momentum are measured. Though they are found to be consistent within uncertainty with theoretical predictions both with and without nucle...
Quantal effects on spinodal instabilities in charge asymmetric nuclear matter Ayik, S.; Er, N.; Yılmaz Tüzün, Özgül; Gokalp, A. (Elsevier BV, 2008-11-01) Quantal effects on growth of spinodal instabilities in charge asymmetric nuclear matter are investigated in the framework of a stochastic mean field approach. Due to quantal effects, in both symmetric and asymmetric matter, dominant unstable modes shift towards longer wavelengths and modes with wave numbers larger than the Fermi momentum are strongly suppressed. As a result of quantum statistical effects, in particular at lower temperatures, magnitude of density fluctuations grows larger than those calculat...
Measurement of the differential cross-sections of inclusive, prompt and non-prompt J/psi production in proton-proton collisions at root s=7 TeV Aad, G.; et. al. (Elsevier BV, 2011-09-21) The inclusive production cross-section and fraction of mesons produced in B-hadron decays are measured in proton–proton collisions at with the ATLAS detector at the LHC, as a function of the transverse momentum and rapidity of the , using 2.3 pb−1 of integrated luminosity. The cross-section is measured from a minimum of 1 GeV to a maximum of 70 GeV and for rapidities within giving the widest reach of any measurement of production to date. The differential production cross-sections of prompt and non-pr...
Spinodal instabilities in nuclear matter in a stochastic relativistic mean-field approach Ayik, S.; Yılmaz Tüzün, Özgül; Er, N.; Gokalp, A.; Ring, P. (American Physical Society (APS), 2009-09-01) Spinodal instabilities and early growth of baryon density fluctuations in symmetric nuclear matter are investigated in the basis of the stochastic extension of the relativistic mean-field approach in the semiclassical approximation. Calculations are compared with the results of nonrelativistic calculations based on Skyrme-type effective interactions under similar conditions. A qualitative difference appears in the unstable response of the system: the system exhibits most unstable behavior at higher baryon d...

Citation Formats

B. Jacquot, M. Colonna, S. Ayik, and P. Chomaz, “RPA instabilities in finite nuclei at low density,” NUCLEAR PHYSICS A, pp. 356–367, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67435.