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The line shapes of giant dipole resonance (GDR) in the decay of the compound nucleus $^{88}$Mo, which is formed after the fusion-evaporation reaction $^{48}$Ti + $^{40}$Ca at various excitation energies $E^{*}$ from 58 to 308 MeV, are…

Nuclear Theory · Physics 2015-06-15 N. Dinh Dang , M. Ciemala , M. Kmiecik , A. Maj

The systematic study of the correlation between the experimental giant dipole resonance (GDR) width and the average deformation <\beta> of the nucleus at finite excitation is presented for the mass region A ~ 59 to 208. We show that the…

Collisional damping widths of giant monopole and quadrupole excitations for $^{120}$Sn and $^{208}$Pb at zero and finite temperatures are calculated within Thomas-Fermi approximation by employing the microscopic in-medium cross-sections of…

Nuclear Theory · Physics 2009-11-07 S. Yildirim , A. Gokalp , O. Yilmaz , S. Ayik

The enhancement of radiative strength function (RSF) in the region of low $\gamma$-rays energy ($E_{\gamma}\leq 12$ MeV), which is caused by the pygmy dipole resonance (PDR), is treated within the phonon damping model (PDM) plus exact…

The universality of the Critical Temperature included Fluctuation Model (CTFM) in explaining the evolution of the giant dipole resonance (GDR) width as a function of angular momentum is examined in the light of recent experimental data on…

The damping rate of hot giant dipole resonances (GDR) is investigated. Besides Landau damping we consider collisions and density fluctuations as contributions to the damping of GDR. Within the nonequilibrium Green's function method we…

Nuclear Theory · Physics 2008-11-26 U. Fuhrmann , K. Morawetz , R. Walke

Proton capture reaction is an important process concerning the astrophysical origin of the elements. In present work, we focus on giant dipole resonance (GDR) in proton capture reactions, such as $^{11}$B$(p, \gamma)^{12}$C, $^{27}$Al$(p,…

Nuclear Theory · Physics 2017-06-06 K. Wang , Y. G. Ma , G. Q. Zhang , X. G. Cao , W. B. He , W. Q. Shen

In a recent Letter [1] an overall agreement with the experimental data for the excitation of the single and double giant dipole resonances in relativistic heavy ion collision in 136Xe and 208Pb nuclei has been reported. We point out that…

Nuclear Theory · Physics 2009-11-07 C. A. Bertulani , P. F. Bortignon , V. Yu. Ponomarev , V. V. Voronov

The pygmy dipole resonance (PDR) at the low-lying tail of the giant dipole resonance (GDR) is an interesting research subject as it carries important information about the nuclear surface with mixed isoscalar and isovector vibrations in $N…

Nuclear Theory · Physics 2025-04-09 L. Tan Phuc , N. Dinh Dang , R. Li , N. Quang Hung

We investigate how well the shape parameterizations are applicable for studying the giant dipole resonance (GDR) in nuclei, in the low temperature and/or high spin regime. The shape fluctuations due to thermal effects in the GDR observables…

Nuclear Theory · Physics 2015-06-26 P. Arumugam , A. Ganga Deb , S. K. Patra

Collisional damping widths of giant dipole excitations are calculated in Thomas-Fermi approximation by employing the microscopic in-medium cross-sections of Li and Machleidt and the phenomenological Gogny force. The results obtained in both…

Nuclear Theory · Physics 2009-10-31 Osman Yilmaz , Ahmet Gokalp , Serbulent Yildirim , Sakir Ayik

We study the impact of finite-temperature effects in numerical-relativity simulations of binary neutron star mergers with microphysical equations of state and neutrino transport in which we vary the effective nucleon masses in a controlled…

High Energy Astrophysical Phenomena · Physics 2023-08-01 Jacob Fields , Aviral Prakash , Matteo Breschi , David Radice , Sebastiano Bernuzzi , André da Silva Schneider

Within the framework of the NJL model, we investigate the modification of the pion damping width in a hot pion gas for temperatures ranging from 0 to 180 MeV. The pion is found to broaden noticeably at T > 60 MeV. Near the chiral phase…

Nuclear Theory · Physics 2009-11-10 D. Blaschke , M. K. Volkov , V. L. Yudichev

The possible constraints on the poorly determined symmetry part of the effective nuclear Hamiltonians or effective energy functionals, i.e., the so-called symmetry energy S(rho), are very much under debate. In the present work, we show that…

Nuclear Theory · Physics 2008-11-26 Luca Trippa , Gianluca Colo' , Enrico Vigezzi

We study the systematics of the giant dipole resonance width $\Gamma$ in hot rotating nuclei as a function of temperature $T$, spin $J$ and mass $A$. We compare available experimental results with theoretical calculations that include…

Nuclear Theory · Physics 2009-01-23 Dimitri Kusnezov , Yoram Alhassid , Kurt Snover

We report ab initio calculations of the S wave pairing gap in neutron matter calculated using realistic nuclear Hamiltonians that include two- and three-body interactions. We use a trial state, properly optimized to capture the essential…

Nuclear Theory · Physics 2022-02-08 S. Gandolfi , G. Palkanoglou , J. Carlson , A. Gezerlis , K. E. Schmidt

We study the correlation between the neutron skin development and the low-energy dipole response associated with the pygmy dipole resonance (PDR) in connection with the properties of symmetry energy. We perform our investigation within a…

Nuclear Theory · Physics 2015-06-16 V. Baran , M. Colonna , M. Di Toro , A. Croitoru , D. Dumitru

Rather than using the geometric method employed in the original Extended Quantum Molecular Dynamics (EQMD) model, this article employs a stochastic approach to analyze the collision term and examine the width of the isovector giant dipole…

Nuclear Theory · Physics 2026-02-25 Chen-Zhong Shi , Xiang-Zhou Cai , Yu-Gang Ma

First-principles density-functional calculations are performed to investigate the thermal transport properties in graphene nanoribbons (GNRs). The dimensional crossover of thermal conductance from one to two dimensions (2D) is clearly…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 Jian Wang , Xiao-Ming Wang , Yun-Fei Chen , Jian-Sheng Wang

A global study of the electric dipole strength in and below the isovector giant dipole resonance (GDR) is presented for mass numbers A>80. It relies on the recently established remarkably good match between data for the nuclear photo effect…

Nuclear Experiment · Physics 2008-12-18 A. R. Junghans , G. Rusev , R. Schwengner , A. Wagner , E. Grosse