Abstract A moving ion in plasma creates a deformed electric potential depending on the velocity, which leads to distinct screening effect compared standard static Salpeter formula. In this paper, adopting test charge method, we explore dynamical effects big bang nucleosynthesis (BBN). We find that high temperature early universe causes velocity be faster than solar condition so is effectively p...

The $^{11}$B$(p,\alpha)2\alpha$ fusion reaction is particularly attractive for energy production purposes because of its aneutronic character and the absence radioactive species among reactants products. Its exploitation in thermonuclear regime, however, appears to be prohibitive due low reactivity $^{11}$B fuel at temperatures up 100 keV. A chain sustained by elastic collisions between alpha p...

At temperatures below 0.1 GK, the $^{19}\mathrm{F}(p,\ensuremath{\gamma})^{20}\mathrm{Ne}$ reaction is only breakout path out of CNO cycle. Experimental studies this are challenging from a technical perspective due to copious $\ensuremath{\gamma}$-ray background far stronger $^{19}\mathrm{F}(p,\ensuremath{\alpha})^{16}\mathrm{O}$ channel. Here, we present first inverse kinematics study reaction...

An experiment was conducted at the High Intensity γ-ray Source (HIγS) facility Triangle Universities Nuclear Laboratory (TUNL) in Durham, NC, USA to measure cross-section of key astrophysical thermonuclear reaction 12 C(α,γ) 16 O by means its inverse photo-disintegration process. A high-intensity monochromatic beam interacted with CO 2 gas active volume Warsaw target TPC detector. The products ...

The synthesis of heavy, proton rich isotopes is a poorly understood astrophysical process. Thermonuclear (type Ia) supernova explosions are among the suggested sites and abundance some present in early solar system may be used to test models. 92Nb such an isotope one reactions playing role its 91Zr(p,gamma)92Nb. As no experimental cross sections were available for this reaction so far, nucleosy...

SLX 1737−282 is a persistent moderately bright X-ray source 1. 2 from the Galactic center. X-ray observations with the Wide Field Cameras on BeppoSAX have for the first time revealed the true nature of SLX 1737−282: a 15-min long thermonuclear flash was detected exposing the source as a neutron star in a binary system. The flash was Eddington-limited constraining the distance to between 5 and 8...

Nuclear reactions govern major aspects of the chemical evolution of galaxies and stars. Analytic study of the reaction rates and reaction probability integrals is attempted here. Exact expressions for the reaction rates and reaction probability integrals for nuclear reactions in the cases of nonresonant, modified nonres-onant, screened nonresonant and resonant cases are given. These are express...

• Prof. James D. Callen, University of Wisconsin, Madison, WI, USA • Dr. Geoffrey Cordey, JET, Abingdon, UK • Dr. Otto Gruber, ASDEX U, Max Planck Institut, Garching bei Muenchen, Germany • Prof. Wendell Horton, IFS, University of Texas at Austin, TX, USA • Dr. Jean Jacquinot, Director of JET, Abingdon, UK (now Director of DRFC, C.E.A., Cadarache, France) • Prof. Guy Laval, Chairman, Ecole Poly...

We have devised a new technique for determining thermonuclear reaction rates of astrophysical importance. By measuring (γ,α) cross sections we will determine (α,γ) reaction rates of processes such as 15N(α,γ)19F and 12C(α,γ)16O with a considerable improvement in sensitivity from previous experiments. Adopting ideas from dark matter search experiments with bubble detectors, we have found that a ...

The propagation of cellularly stabilized thermonuclear flames is investigated by means of numerical simulations. In Type Ia supernova explosions the corresponding burning regime establishes at scales below the Gibson length. The cellular flame stabilization—which is a result of an interplay between the LandauDarrieus instability and a nonlinear stabilization mechanism—is studied for the case of...