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Recent studies have revealed that certain nuclear parameters are more dominant than others in governing global neutron star properties, such as its structure or oscillation mode characteristics. Although neutron stars can in general assumed…

High Energy Astrophysical Phenomena · Physics 2025-01-16 Nilaksha Barman , Bikram Keshari Pradhan , Debarati Chatterjee

Type-I X-ray bursts can be used to determine properties of accreting neutron stars via comparisons between model calculations and astronomical observations, exploiting the sensitivity of models to astrophysical conditions. However, the…

High Energy Astrophysical Phenomena · Physics 2019-02-19 Zach Meisel , Grant Merz , Sophia Medvid

The s-process in massive stars, producing nuclei up to $A\approx 90$, has a different behaviour at low metallicity if stellar rotation is significant. This enhanced s-process is distinct from the s-process in massive stars around solar…

Solar and Stellar Astrophysics · Physics 2018-02-19 N. Nishimura , R. Hirschi , T. Rauscher

Accurately quantifying the transmutation rate of tungsten (W) under neutron irradiation is a necessary requirement in the assessment of its performance as an armour material in a fusion power plant. The usual approach of calculating average…

Instrumentation and Detectors · Physics 2017-03-28 M. R. Gilbert , J. -Ch. Sublet , S. L. Dudarev

In order to study the processes creating intermediate and heavy nuclei in massive stars it is necessary to provide neutron capture cross sections and reaction rates close to stability and for moderately unstable neutron-rich nuclei.…

Astrophysics · Physics 2007-05-23 T. Rauscher , A. Heger , S. E. Woosley , R. D. Hoffman

In this work we revisit the thermal relaxation process for neutron stars. Such process is associated with the thermal coupling between the core and the crust of neutron stars. The thermal relaxation, which takes place at around 10 -- 100…

High Energy Astrophysical Phenomena · Physics 2020-10-07 Thiago Sales , Odilon Lourenço , Mariana Dutra , Rodrigo Negreiros

The temperature of a newly formed neutron star is believed to be as high as $10^{11}$~K, corresponding to a thermal energy of about $10$ MeV. After a time $t \sim 50 \ {\rm s}$, the neutrino mean free path in nuclear matter exceeds the…

Nuclear Theory · Physics 2025-06-02 Omar Benhar , Lucas Tonetto

Recent observations have found several candidates for old warm neutron stars whose surface temperatures are above the prediction of the standard neutron star cooling scenario, and thus require some heating mechanism. Motivated by these…

High Energy Astrophysical Phenomena · Physics 2020-02-20 Keisuke Yanagi , Natsumi Nagata , Koichi Hamaguchi

We discuss the fission barrier height of neutron-rich nuclei in a r-process site at highly excited state, which is resulted from the beta-decay or the neutron-capture processes. We particularly investigate the sensitivity of the fission…

Nuclear Theory · Physics 2008-11-26 Futoshi Minato , Kouichi Hagino

The rapid neutron capture process (r-process) is thought to be responsible for the creation of more than half of all elements beyond iron. The scientific challenges to understanding the origin of the heavy elements beyond iron lie in both…

Nuclear Theory · Physics 2015-06-12 S. Brett , I. Bentley , N. Paul , R. Surman , A. Aprahamian

The extreme conditions in Neutron Stars make them ideal test facilities for fundamental interactions. A Neutron Star can capture Dark Matter via scattering. As a result of the scattering, Dark Matter kinetic energy is transferred to the…

High Energy Physics - Phenomenology · Physics 2022-09-21 Giorgio Busoni

A quasi-statistical equilibrium model is constructed to simulate the multicomponent composition of the crust of an accreting neutron star. The ashes of rp-process nucleosynthesis are driven by accretion through a series of electron…

Nuclear Theory · Physics 2012-05-17 Andrew W. Steiner

Transiently accreting neutron stars in quiescence (Lx<10^34 erg/s) have been observed to vary in intensity by factors of few, over timescales of days to years. If the quiescent luminosity is powered by a hot NS core, the core cooling…

Astrophysics · Physics 2009-11-06 Greg Ushomirsky , Robert E. Rutledge

The propagation of uncertainties in reaction cross sections and rates of neutron-, proton-, and alpha-induced reactions into the final isotopic abundances obtained in nucleosynthesis models is an important issue in studies of…

High Energy Astrophysical Phenomena · Physics 2025-01-07 T. Rauscher , N. Nishimura , G. Cescutti , R. Hirschi , A. St. J. Murphy , C. Travaglio

The thermal properties of asymmetric nuclear matter are investigated in a relativistic mean- field approach. We start from free space NN-interactions and derive in-medium self-energies by Dirac-Brueckner theory. By the DDRH procedure we…

Nuclear Theory · Physics 2015-03-11 Andreas Fedoseew , Horst Lenske

The continued interest to the study of the radiative neutron capture on atomic nuclei is caused, on the one hand, by the important role of this process in the analysis of many fundamental properties of nuclei and nuclear reactions, and, on…

Nuclear Theory · Physics 2014-01-29 S. B. Dubovichenko , A. V. Dzhazairov-Kakhramanov , N. A. Burkova

Using the most recent realistic effective interactions for nuclear matter with a smooth extrapolation to high densities including causality, we constrain the equation of state and calculate maximum masses of rotating neutron stars. First…

Astrophysics · Physics 2009-10-31 H. Heiselberg , M. Hjorth-Jensen

The internal properties of the neutron star crust can be probed by observing the epoch of thermal relaxation. After the supernova explosion, powerful neutrino emission quickly cools the stellar core, while the crust stays hot. The cooling…

Astrophysics · Physics 2009-10-31 Oleg Y. Gnedin , Dmitry G. Yakovlev , Alexander Y. Potekhin

Effect of atomic disordering induced by irradiation with fast neutrons on the properties of the normal and superconducting states of polycrystalline samples FeSe has been studied. The irradiation with fast neutrons of fluencies up to…

Superconductivity · Physics 2011-11-28 A. E. Karikin , T. Wolf , A. N. Vasil'ev , O. S. Volkova , B. N. Goshchitskii

The reaction rates of neutron capture reactions on light nuclei are important for reliably simulating nucleosynthesis in a variety of stellar scenarios. Neutron capture reaction rates on neutron-rich C-, N-, and O-isotopes are calculated in…

Nuclear Theory · Physics 2008-11-26 H. Herndl , R. Hofinger , J. Jank , H. Oberhummer , J. Goerres , M. Wiescher , F. -K. Thielemann , B. A. Brown