Enhanced electron screening in d(d,p)t for deuterated metals

Raiola, F.; Liu, Gang; Bonomo, C.; Gyürky, Gy.; Aliotta, M.; Becker, Hans‐Werner; Bonetti, R.; Broggini, C.; Corvisiero, P.; D’Onofrio, Antonio; Fülöp, Zs.; Gervino, G.; Gialanella, L.; Junker, M.; Prati, P.; Roca, V.; Rolfs, C.; Romano, M.; Somorjai, E.; Strieder, F.; Terrasi, F.; Fiorentini, G.; Langanke, K.; Winter, J.

doi:10.1140/epja/i2003-10125-0

Cited by 108 publications

(120 citation statements)

References 8 publications

Supporting

Mentioning

105

Contrasting

Order By: Relevance

“…For example, screening in d(d,p)t has been studied for gaseous targets and for deuterated metals, insulators, and semiconductors [23,24]. It is believed that the quasi-free valence electrons in metals create a screening environment quite similar to that found in stellar plasmas.…”

Section: And Its Effects On Big-bang Nucleosynthesismentioning

confidence: 99%

Electron screening and its effects on big-bang nucleosynthesis

2011

View full text Add to dashboard Cite

We study dynamical screening effects of nuclear charge on big bang nucleosynthesis (BBN). A moving ion in plasma creates a distorted electric potential leading to a screening effect which is different from the standard static Salpeter formula. We consider the electric potential for a moving test charge, taking into account dielectric permittivity in the unmagnetized Maxwellian plasma during the BBN epoch. Based on the permittivity in a BBN plasma condition, we present the Coulomb potential for a moving nucleus, and show that enhancement factor for the screening of the potential increases the thermonuclear reaction rates by a factor order of 10 −7. In the Gamow energy region for nuclear collisions, we find that the contribution of the dynamical screening is less than that of the static screening case, consequently which primordial abundances hardly change. Based on the effects of dynamical screening under various possible astrophysical conditions, we discuss related plasma properties required for possible changes of the thermal nuclear reactions.

show abstract

Section: And Its Effects On Big-bang Nucleosynthesismentioning

confidence: 99%

Electron screening and its effects on big-bang nucleosynthesis

2011

View full text Add to dashboard Cite

show abstract

“…The electron screening in d(d,p)t was studied previously for deuterated metals, insulators, and semiconductors, i.e. 58 samples in total [2,3] (see also [4,5]). As compared to measurements performed with a gaseous D 2 target (U e = 25 eV [6]), a large screening was observed in the metals (of order U e = 300 eV), a e-mail: raiola@ep3.rub.de; for the LUNA Collaboration.…”

Section: Introductionmentioning

confidence: 99%

“…An exception was found for the metals of groups 3 and 4 of the periodic table and the lanthanides, which showed a small screening; this is related to their high hydrogen solubility y (= 1/x [2,3]), of the order of unity (see also [7]), that gives the deuterated targets of these metals the properties of insulators. Indeed, for the metals with high U e values, the solubilities were small (a few percent) leaving the metallic character of the samples essentially unchanged.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, for the metals with high U e values, the solubilities were small (a few percent) leaving the metallic character of the samples essentially unchanged. An explanation of the large screening was suggested [3] by the plasma screening of Debye applied to the quasi-free metallic electrons. The electron Debye radius around the deuterons in the lattice is given by…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced d(d,p)t fusion reaction in metals

et al. 2006

Self Cite

View full text Add to dashboard Cite

“…Our calculations refer to particles either slowing down in PdD, or in D 2 O. In the case of PdD, we have used a screening energy U e of 800 eV (Raiola et al 2004); and for D 2 O we have used 25 eV. We are able to compute a yield for the secondary neutrons using this secondary neutron cross section.…”

Section: Secondary Neutrons Resulting From Knock-on Deuteronsmentioning

confidence: 99%

Constraints on energetic particles in the Fleischmann–Pons experiment

Hagelstein

2010

Naturwissenschaften

View full text Add to dashboard Cite

In recent Fleischmann-Pons experiments carried out by different groups, a thermal signal is seen indicative of excess energy production of a magnitude much greater than can be accounted for by chemistry. Correlated with the excess heat appears to be 4 He, with the associated energy near 24 MeV per helium atom. In nuclear reactions, the energy produced is expressed through the kinetic energy of the products; hence it would be natural to assume that some of the reaction energy ends up as kinetic energy of the 4 He nucleus. Depending on the energy that the helium nucleus is born with, it will result in radiation (such as neutrons or x-rays) that can be seen outside of the cell. We have computed estimates of the expected neutron and x-ray emission as a function of helium energy, and compared the results with upper limits taken from experiments.Experimental results with upper limits of neutron emission between 0.008 to 0.8 n/J are found to correspond to upper limits in alpha energy between 6.2 keV and 20.2 keV.

show abstract

Enhanced electron screening in d(d,p)t for deuterated metals

Cited by 108 publications

References 8 publications

Electron screening and its effects on big-bang nucleosynthesis

Electron screening and its effects on big-bang nucleosynthesis

Enhanced d(d,p)t fusion reaction in metals

Constraints on energetic particles in the Fleischmann–Pons experiment

Contact Info

Product

Resources

About