Strong Enhancement of Dd-Reaction Accompanied by X-Ray Generation in a Pulsed Low Voltage High-Current Deuterium Glow Discharge With a Titanium Cathode

Lipson, A. G.; Miley, G.H.; Roussetski, A. S.; Karabut, A. B.

doi:10.1142/9789812701510_0057

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…We note that there has appeared very recently measurements of dd-fusion cross sections at low energy which appear to show significant enhancements 3 (see also [4] Earlier measurements in TiD produced reaction rates similar to that of D 2 , while the new measurements show very large enhancements. We await experimental confirmation of the effect.…”

Section: Introductionmentioning

confidence: 59%

“…We assume in this model that we have N 1 deuteron pairs (with double occupation of a site) which may fuse with phonon exchange to make 4 He. The excitation energy from the reactions is used to drive excitations elsewhere within the coherence domain of a highly excited phonon.…”

Section: Simplified Modelmentioning

confidence: 99%

“…Our early models for phonon exchange showed clearly that if reactions at two sites involved phonon exchange with a highly excited phonon mode, then the two reactions could be coupled together as a second-order quantum process. Early data for fast alpha emission supported this notion, where the energy of two deuterons fusing to 4 He was proposed to be available to ionize an alpha particle out of Pd nuclei. The fastest site-other-site process was predicted to be one in which the energy from two deuterons fusing went into dissociating a 4 He nucleus.…”

Section: Simplified Modelmentioning

confidence: 99%

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Resonant Tunneling and Resonant Excitation Transfer

Hagelstein

2005

Condensed Matter Nuclear Science

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Issues involved in the tunneling of deuterons in metal deuterides are considered in relation to experimental claims of anomalies in metal deuterides. From earlier studies, screening is thought to be similar to the case of molecular D 2 . Resonant tunneling has been advocated in the literature as a possible mechanism to achieve tunneling enhancements. We develop a two-level system for a piecewise constant potential model for resonant tunneling that matches the energy levels in the vicinity of a level crossing, arguing that such models are applicable for more general potential models. Resonant tunneling effects and dynamics, including acceleration due to coherence, are accounted for in the model. The model is extended to include relaxation effects, and it is found that one would not expect to find coherent effects associated with tunneling in the case of two deuterons in a metal lattice. We present a simple model for the transfer of excitation from a collection of deuterons to a collection of helium nuclei, a model closely related to resonant tunneling and also to new phonon-coupled SU(N) models under development. The excitation transfer models show coherent enhancements as well as collective effects.

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Section: Introductionmentioning

confidence: 59%

Section: Simplified Modelmentioning

confidence: 99%

Section: Simplified Modelmentioning

confidence: 99%

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Resonant Tunneling and Resonant Excitation Transfer

Hagelstein

2005

Condensed Matter Nuclear Science

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“…From our experience Zr oxidizes readily. So a relatively thick metal oxide layer explains the results and the discrepancy to the value in [22]. It was obtained with a glow discharge of 2 0% 5 A deuteron current.…”

Section: Comparisonmentioning

confidence: 67%

Accelerator Experiments and Theoretical Models for the Electron Screening Effect in Metallic Environments

Huke¹,

Czerski²,

Heide³

2006

Condensed Matter Nuclear Science

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An overview of our experiments and their results concerning the electron screening effects in metallic environments are presented. The measurements of the reactions 2 H(d,p) 3 H and 2 H(d,n) 3 He were performed with an electrostatic accelerator at incident deuteron energies between 5 and 60 keV at different self-implanted target materials. The resulting screening energy values are about one order of magnitude larger compared to gas target experiments and exceed significantly the theoretical predictions. A thorough investigation of the processes in the targets under ion irradiation shows that there are multi-parameter collateral effects which are crucial for the correct interpretation of the observed enhancements. They mainly originate from target surface contaminations due to residual gases in the vacuum as well as from inhomogeneities in the deuteron density distribution in heterogeneous targets. For the special situation of deuterium in the metallic environment an improved analysis method has been developed beyond the standard procedures. Experimental evidence for the influence of such effects and a mathematical model for their assessment are given and compared with the results of other groups. We also present a numerical model of the electron screening effect in metallic lattices based on an ab-initio Hartree-Fock simulation.

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