Detection of three-body deuteron fusion in titanium deuteride under the stimulation by a deuteron beam

With certain conditions for target-samples and beams, we have identified specific particles (e.g., 4.75MeV tritons and 3 He-particles, and 15.9 MeV deuterons) from 3D fusion reactions with yield ratios [3D]/[2D] on the order of 1E-4 to 1E-3, in contrary to the calculated [3D]/[2D] yield ratio of 1E-30 according to conventional random nuclear reaction theory 2,3) . The increasing trend of yield ratios in lower energy regions (less than 100 keV for deuteron) 4) , suggests that the enhanced 3D reactions were not attributed to the direct reactions with incident d-beam, but to the indirect 3D fusion out of the slowing down range of the beam.

Section: Introductionmentioning

confidence: 75%

Section: He + T Branchmentioning

confidence: 99%

STUDIES ON 3D FUSION REACTIONS IN TiD_x UNDER ION BEAM IMPLANTATION

Takahashi

Miyamaru

Ochiai

et al. 2005

“…On the basis of the hypothesis it is possible to draw the following consequences: some of these have already been stated by Takahashi 1,2 ; notably the relative prevalence of 4 He, 3 He, tritium and neutrons.…”

Section: Predictionsmentioning

confidence: 91%

Triple Deuterium Fusion by Three Body Recombination Between Deuteron and the Nuclei of Lattice Trapped Deuterium Molecules

Engvild¹,

Kowalski²

2005

A hypothesis is proposed where low energy nuclear reactions involve three-body recombination of deuterons injected between the nuclei of D 2 molecules trapped in a dense lattice of a chemical compound of transition metal and impurity. Two D's fuse to 4 He, and the energy is converted by expulsion of the third deuteron. Measurable fusion occurs when two D's are confined within 0.1 angstrom of each other. Three boson (efimov) interactions can have longer range than two boson interactions. The best known example is triple alpha fusion to carbon-12 in stars. Triple deuterium interaction could perhaps be possible in the 0.5-1.0 angstrom range; the distance between D's in a D 2 molecule are 0.74 angstrom. The hypothesis accounts for the low reproducibility and short duration of the effect because of rapid destruction of the active structure by sputtering, radiation damage, bubble formation and chemical reduction of the impurities to compounds like D 2 O, ND 3 , CD 4 , or BD 3 . The hypothesis also accounts for the observed prevalence of 4 He >> tritium >> neutrons.

“…First of all, it should be mentioned that we were unable to identify any reaction products of the DD(d,np) 4 He, DD(d,d) 4 He nor DD(d,t) 3 He reactions during the experiments done so far with use of Pd and Au/Pd. However, the D(d,p)t reaction has shown anomalous behavior under some conditions.…”

Section: Evolution Of D(dp)t Reaction Yieldmentioning

confidence: 92%

“…and DD(d, 3 He)t, have been claimed to take place with great enhancements of the reaction rate in TiD x samples bombarded with deuterons in the 100 keV energy region [1][2][3]. The D(d,p)t reaction rate also has been measured in the energy region of several keV in various samples [4] to find that the nuclear reaction rate could be enhanced in a condensed matter.…”

Section: Introductionmentioning

confidence: 97%

D(d,p)t REACTION RATE ENHANCEMENT IN A MIXED LAYER OF Au AND Pd

Kitamura

Awa

Minari

et al. 2005

To investigate possible anomalies in nuclear reactions in solids, deuterium ion irradiation of deuterated Au/Pd samples have been performed with extensive measurements of reaction products and in situ characterization of the samples including ERDA and RBS. The D(d,p)t reaction rate has been observed to become three orders of magnitude greater than the calculated one. The deuterium density distribution in the sample with a composition modified by irradiation has been observed to peak at a depth appreciably greater than the projectile range. We speculate that the formation of the mixed layer of Au and Pd maintaining significantly high deuterium density is the key factor for the reaction rate enhancement.