14885-60-0Relevant articles and documents
RECOIL TRITIUM REACTIONS WITH MOLECULAR HYDROGEN PART 1.-SCAVENGER EFFECTS
Malcolme-Lawes, David J.,Oldham, Graham,Ziadeh, Yacoub
, (1981)
Scavenger curves for O2, Br2 and ICl scavengers have been obtained in the T + H2 system moderated by helium, argon and krypton.Results indicate that scavenger competition is significant with all three scavengers but that the behaviour of oxygen scavenger
Non-statistical formation of J=1 T2 (ortho- T2 ) in recombination reaction of T+T+M→T2+M in liquid helium at 1.42-2.50 K
Iguchi, Kazunari,Kumada, Takayuki,Okuno, Kenji,Aratono, Yasuyuki
, p. 421 - 425 (2001)
During the course of an investigation on chemical behaviors of hydrogen isotopes in quantum media, non-statistical formation of ortho-T2 was observed in recombination reaction of T+T+3,4He→T2+3,4He in liquid su
ENRICHMENT OF TRITIUM IN HYDROGEN OR DEUTERIUM BY THERMAL DIFFUSION.
Takayasu,Makino,Yamagami,Takeuchi
, p. 1238 - 1241 (1982)
Tritium in H//2 or D//2, 1. 7 multiplied by 10** minus **2Ci mol** minus **1, was enriched by means of thermal diffusion at the bottom of a 100-cm glass column with a gas reservoir on top. Four columns with different diameters (8, 20, 30, and 41 mm phi ) were used. The temperature of the wire stretched along the axis of the column was changed over a range from 200 degree C to 450 degree C. The maximum equilibrium separation factors in hydrogen and in deuterium were 17 and 4. 5 respectively. The optimum diameters were estimated by a modification of Waldmann's equation, which can be used for the separation using the flat-type system.
The moderation and tunneling reaction of recoil T atoms in solid xenon-hydrogen mixtures at 77 K
Fujitani,Miyazaki,Fueki,Masaki,Aratono,Saeki,Tachikawa
, p. 520 - 524 (1990)
Recoil T atom reactions were studied in Xe-H2-D2 mixtures at 77 K. The isotope effect on the T-atom reaction with H2 and D2 (k(T+H2{HT+H)/k(T+D2{DT+D)) was measured on the basis of the HT and DT yields. The isotope effect (k(T+H2)/k(T+D2)) is 1.1 in the range of hydrogen concentrations of 0.1 - 1.0 mol%. Since the small isotope effect (1.1) is similar to the isotope effect (1.0) for a hot T-atom reaction in the gas phase, recoil T atoms are not thermalized at these concentrations in solid xenon and form HT and DT by means of hot-atom reactions. At concentrations of hydrogen of less than 0.1 mol%, the recoil T atoms are thermalized before they encounter the solute hydrogen. The isotope effect increases with a decrease in the hydrogen concentration and amounts to 3.1 at a hydrogen concentration of 0.01 mol%. Since a large isotope effect is expected for the tunneling reaction of T atoms, the large isotope effect (3.1) at 0.01 mol% hydrogen was interpreted in terms of the tunneling reaction of thermalized T atoms. The present results in the solid xenon-hydrogen mixtures were compared with those in the gaseous xenon-hydrogen mixtures reported previously. It was concluded that hot T atoms in the solid xenon at 77 K are deactivated much less effectively than in the gas phase and that they migrate long distances with excess kinetic energies.
Spin-directed Reaction of Recoil Tritium with Hydrogen
Hawke, John G.,Suweda, Anak A.,Lukey, Christopher A.
, p. 499 - 501 (1986)
In the reaction of recoil tritium, produced by the He3(n,p)T reaction, with para-H2-enriched mixtures of H2 with D2 the HT/DT ratio obtained from unmoderated systems (i.e. reaction observed in the high energy 'hot' region) is almost independent
Recoil Tritium Reactions with Molecular Hydrogen. Part 2.-Moderation Effects
Malcolme-Lawes, David J.,Oldham, Graham,Ziadeh, Yacoub Z.
, p. 961 - 970 (1982)
Moderation studies of the T + H2 and T + D2 systems moderated by helium, argon and krypton are reported.The derived kinetic parameters indicate that helium is a much poorer moderator in these systems than is either argon or krypton.This observation is rationalised by considering the effect of collisional dissociation of translationally excited product in the different moderators, and the effect of an αHe, which declines as the collision energy increases.
Influence of superfluidity on recombination reactions of H + T → HT and T + T → T2 in 3He-4He quantum media under saturated vapor pressure at 1.6 K
Aratono, Yasuyuki,Iguchi, Kazunari,Okuno, Kenji,Kumada, Takayuk
, p. 3741 - 3746 (2007/10/03)
An influence of superfluidity on chemical reaction has been studied in the recombination reactions of hydrogen (H) and tritium (T) atoms, H + T → HT and T + T → T2, in 3He-4He mixture solutions at 1.6 K. The reactive species, H and T atoms, were produced in the mixture through the nuclear reaction, 3He + n → p(H) + T. Experimental yield ratio of HT to T2 was 110 ± 17 in normal-fluid solution. However, in superfluid solution, the value decreased to 60 with a decrease in atomic fraction of 3He. A two-fluid model was applied to estimate the contribution of superfluidity. The calculated yield of HT to T2 in the superfluid component became almost a constant value of 56 ± 14 over the whole range of superfluid solution studied. On the basis of preferential formation of HT over T2 and a computer simulation of relative rate constants, formation of hydrogen isotope bubbles and their tunneling recombination were proposed.
Chemical Erosion of Irradiated Graphite
Tsetskhladze, T. V.,Cherkezishvili, L. I.,Tsibakhashvili, N. Ya.
, p. 864 - 865 (2007/10/02)
We have studied the chemical processess occuring in graphite under the action of recoil tritium atoms.The reaction products have been identified and the dependence of their yields on the annealing temperature established.
