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We developed a hierarchical Bayesian framework to estimate S-factors and thermonuclear rates for the $^3$He(d,p)$^{4}$He reaction, which impacts the primordial abundances of $^3$He and $^7$Li. The available data are evaluated and all direct…

Instrumentation and Methods for Astrophysics · Physics 2019-02-19 Rafael S. de Souza , Christian Iliadis , Alain Coc

The $^3{\rm H}(d,n)^4{\rm He}$ reaction is of significant interest in nuclear astrophysics and nuclear applications. It is an important, early step in big-bang nucleosynthesis and a key process in nuclear fusion reactors. We use one- and…

Nuclear Theory · Physics 2022-02-09 Daniel Odell , Carl Brune , Daniel Phillips

Big bang nucleosynthesis (BBN) is the standard model theory for the production of the light nuclides during the early stages of the universe, taking place for a period of about 20 minutes after the big bang. Deuterium production, in…

Cosmology and Nongalactic Astrophysics · Physics 2021-12-22 Joseph Moscoso , Rafael S. de Souza , Alain Coc , Christian Iliadis

The problem of estimating non-resonant astrophysical S-factors and thermonuclear reaction rates, based on measured nuclear cross sections, is of major interest for nuclear energy generation, neutrino physics, and element synthesis. Many…

Solar and Stellar Astrophysics · Physics 2016-11-09 Christian Iliadis , Kevin Anderson , Alain Coc , Frank Timmes , Sumner Starrfield

The study of d+d reactions is of major interest since their reaction rates affect the predicted abundances of D, 3He, and 7Li. In particular, recent measurements of primordial D/H ratios call for reduced uncertainties in the theoretical…

Instrumentation and Methods for Astrophysics · Physics 2017-11-15 Á. Gómez Iñesta , C. Iliadis , A. Coc

The deuteron-deuteron (D-D) thermonuclear reaction rates in metallic environments (considering the electron screening effects) is calculated using the S-factor functions which were obtained by fitting to low-energy data on D-D reactions.…

Nuclear Theory · Physics 2025-06-03 Faisal Etminan

Recent astronomical data have provided the primordial deuterium abundance with percent precision. As a result, Big Bang nucleosynthesis may provide a constraint on the universal baryon to photon ratio that is as precise as, but independent…

Nuclear fusion reactions at sub-barrier energies play crucial roles in many aspects of primordial nucleosynthesis in stellar objects. One of the primary aspects that plays a pivotal role in understanding the relationship between stellar…

Nuclear Theory · Physics 2025-12-15 N. Mohammad , H. Sultana , Md. R. Islam , Md. A. Khan

Experimental study of the nuclear fusion reaction in charge-asymmetrical d-mu-3He complex is presented. The 14.6 MeV protons were detected by three pairs of Si(dE-E) telescopes placed around the cryogenic target filled with the deuterium +…

The rate at which helium ($^4$He) and deuterium ($d$) fuse together to produce lithium-6 ($^6$Li) and a $\gamma$ ray, $^4$He$(d,\gamma)^6$Li, is a critical puzzle piece in resolving the roughly three orders of magnitude discrepancy between…

Muon catalyzed fusion in deuterium has traditionally been studied in gaseous and liquid targets. The TRIUMF solid-hydrogen-layer target system has been used to study the fusion reaction rates in the solid phase of D_2 at a target…

The astrophysical $S$-factor for the radiative capture $d(p,\gamma)^3$He in the energy-range of interest for Big Bang Nucleosynthesis (BBN) is calculated using an {\it ab-initio} approach. The nuclear Hamiltonian retains both two- and…

Nuclear Theory · Physics 2016-03-23 L. E. Marcucci , G. Mangano , A. Kievsky , M. Viviani

The plasma astrophysical S factor for the 3He(D, p)4He fusion reaction was measured for the first time at temperatures of few keV, using the interaction of intense ultrafast laser pulses with molecular deuterium clusters mixed with 3He…

We present a new accurate analysis of the $^3$He$(p,e^+\nu_e)$${}^4$He (''hep'') reaction at astrophysical energies. The S-factor is computed using a state-of-the-art method to calculate the four-nucleon scattering and bound-state wave…

Nuclear Theory · Physics 2026-05-20 Michele Viviani , Alex Gnech , Laura Elisa Marcucci , Alejandro Kievsky , Luca Girlanda

The results are presented on the total cross sections, astrophysical S-factor, reaction rate of the deuteron radiative capture on 3He at the temperatures from 0.03 up to 3 T9 calculated in the framework of the potential cluster model with…

Nuclear Theory · Physics 2017-11-27 Sergey Dubovichenko , Nataliya Burkova , Albert Dzhazairov-Kakhramanov

A theoretical study on thermonuclear fusion including deuterium-tritium (D-T) fusion and D-$^{3}$He fusion in intense laser fields has been shown in this article. With the laser fields expected to be available in the near future, some…

Nuclear Theory · Physics 2022-02-09 Jintao Qi

The nuclear reaction e+p+d -----> He3 + e is considered at thermonuclear energies. The motion of the electron is treated within the adiabatic approximation and the pd scattering state is constructed in the form of an antisymmetrized product…

Nuclear Theory · Physics 2009-10-30 S. A. Rakityansky , S. A. Sofianos , L. L. Howell , M. Braun , V. B. Belyaev

Comparing with ITER, the experimental fusion machine under constraction, the next step test fusion power plant, DEMO will be characterized by very long pulse/steady-state operation and much higher plasma volume and fusion power. The…

Instrumentation and Detectors · Physics 2015-10-29 V. G. Kiptily

Deuterated molecules are important chemical tracers of prestellar and protostellar cores. Up to now, the titular reaction has been assumed to contribute to the generation of these deuterated molecules. We have measured the merged-beams rate…

Instrumentation and Methods for Astrophysics · Physics 2019-05-24 Pierre-Michel Hillenbrand , Kyle P. Bowen , Jacques Liévin , Xavier Urbain , Daniel W. Savin
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