Wirkungsquerschnitte der Kernreaktionen 6Li(p, α)3He und 7Li(p, α)4He bei kleinsten energien

Fiedler, O.; Kunze, P.

doi:10.1016/0375-9474(67)90601-x

Cited by 27 publications

(15 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Fig. 7 we compare the results for the S-factor with both 6 Li and 3 He cluster polarization with the available experimental cross section data [62][63][64][65][66][67][68][69][70]. Notations and data are taken from [71] and the web site http://pntpm.ulb.ac.be.…”

Section: The Reaction 6 Li(p 3 He) 4 Hementioning

confidence: 97%

A microscopic three-cluster model with nuclear polarization applied to the resonances of 7Be and the reaction 6Li(p, 3He)4He

et al. 2009

View full text Add to dashboard Cite

A microscopic model for three-cluster configurations in light nuclei is presented. It uses an expansion in terms of Faddeev components for which the dynamic equations are derived. The model is designed to investigate binary channel processes in a compound system. Gaussian and oscillator bases are used to expand the wave function and to represent appropriate boundary conditions. We study the effect of cluster polarization on ground and resonance states of 7 Be, and on the astrophysical S-factor of the reaction 6 Li(p, 3 He) 4 He.

show abstract

Section: The Reaction 6 Li(p 3 He) 4 Hementioning

confidence: 97%

A microscopic three-cluster model with nuclear polarization applied to the resonances of 7Be and the reaction 6Li(p, 3He)4He

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Experimental data for the reaction are shown, along with our fit (solid line), "1σ" and "2σ" uncertainties in our fit (symmetrical dot-dash lines), and the standard fit of Harris et al [12] (long dash line). Data are those of > Gemeinhardt [13], Fiedler & Kunze [15], < Spinka et al [16], ✷ Kwon et al [14], ✸ Shinozuka et al [17], ⋆ Elwyn et al [18], △ Marion et al [19], × Várnagy et al [20], and ▽ Engstler et al [10].…”

Section: Figmentioning

confidence: 99%

“…In addition, we present the S-factor curve corresponding to the rate found in the compilation of Harris et al [12]. Following Engstler et al [10], we use only the data above 100 keV [13,14,15,16,17,18,19,20,10] in the fit to avoid the effects of electron screening. Unlike their fit, ours includes their data in addition to previous data.…”

Section: Hementioning

confidence: 99%

“…Treating all errors as statistical in our least-squares fit to the cross-section data gives a 1σ error of 5% in overall normalization (based on the fitting error at 100 keV, an energy relevant to BBN). An estimated 2σ error of 15% includes all of the lowest data points except those of Fiedler and Kunze [15], which were not used in the fit, and which seem to be normalized differently from the rest of the data. We will use this rather extreme estimate to determine upper limits on the 6 Li yield.…”

Section: Hementioning

confidence: 99%

See 1 more Smart Citation

Nuclear reaction rates and primordial6Li

1997

View full text Add to dashboard Cite

We examine the possibility that Big Bang Nucleosynthesis (BBN) may produce non-trivial amounts of 6 Li. If a primordial component of this isotope could be observed, it would provide a new fundamental test of Big-Bang cosmology, as well as new constraints on the baryon density of the universe. At present, however, theoretical predictions of the primordial 6 Li abundance are extremely uncertain due to difficulties in both theoretical estimates and experimental determinations of the 2 H(α, γ) 6 Li radiative capture reaction cross-section. We also argue that present observational capabilities do not yet allow the detection of primeval 6 Li in very metal-poor stars of the galactic halo. However, if the critical cross section is towards the upper end of its plausible range, then improvements in 6 Li detection capabilities may allow the establishment of 6 Li as another product of BBN. It is also noted that a primordial 6 Li detection could help resolve current concerns about the extragalactic D/H determination. 26.35.+c,26.44.+h,25.90.+k

show abstract

“…This is the main process destroying 7 Li during the BBN. The data used in our analysis are the ones quoted in [142]- [146]. A self-consistent correction for the screening potential was also performed, whose effect is particularly significant for the low-energy data of Engstler et al [145,146].…”

Section: Reaction Li7pαmentioning

confidence: 99%

Nuclear reaction network for primordial nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields

Serpico

Esposito

Iocco

et al. 2004

J. Cosmol. Astropart. Phys.

250

307

View full text Add to dashboard Cite

Abstract. We analyze in details the standard Primordial Nucleosynthesis scenario. In particular we discuss the key theoretical issues which are involved in a detailed prediction of light nuclide abundances, as the weak reaction rates, neutrino decoupling and nuclear rate modeling. We also perform a new analysis of available data on the main nuclear processes entering the nucleosynthesis reaction network, with particular stress on their uncertainties as well as on their role in determining the corresponding uncertainties on light nuclide theoretical estimates. The current status of theoretical versus experimental results for 2 H, 3 He, 4 He and 7 Li is then discussed using the determination of the baryon density as obtained from Cosmic Microwave Background anisotropies.

show abstract

Wirkungsquerschnitte der Kernreaktionen 6Li(p, α)3He und 7Li(p, α)4He bei kleinsten energien

Cited by 27 publications

References 6 publications

A microscopic three-cluster model with nuclear polarization applied to the resonances of 7Be and the reaction 6Li(p, 3He)4He

A microscopic three-cluster model with nuclear polarization applied to the resonances of 7Be and the reaction 6Li(p, 3He)4He

Nuclear reaction rates and primordial6Li

Nuclear reaction network for primordial nucleosynthesis: a detailed analysis of rates, uncertainties and light nuclei yields

Contact Info

Product

Resources

About