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JAEA Reports

Measurement and evaluation of isotope effect between tritium and deuterium on diffusion and surface recombination in/on nickel using ion driven permeation method (Cooperative research)

Nakamura, Hirofumi; Nishi, Masataka; Sugisaki, Masayasu*

JAERI-Research 2003-018, 32 Pages, 2003/09

JAERI-Research-2003-018.pdf:1.32MB

Tritium transport behavior in materials, which is essential for the safety evaluation of the fusion reactor, has to be evaluated by either tritium properties or extrapolated value from protium or deuterium (D) to tritium (T) using the isotope effect theory. However, there are still some uncertainties on estimation of T behavior in materials, because there are only a few T transport properties data in materials, and it is not completely proven the application of the isotope effect theory to T due to the lack of T data. Therefore, in order to understand the tritium transport properties in materials, isotope effects on diffusion and surface recombination between T and D in/on nickel, whose hydrogen transport properties were well known, were investigated by comparing the obtained properties of T with those of D measured under the same conditions with the ion driven permeation method. Though obtained diffusion coefficient of T was larger than that of D, and activation energy of diffusion of T was smaller than that of D as the contrary to the classical diffusion theory, those were shown to be explained with a modified diffusion theory by introducing higher vibration temperatures in nickel than previous reported values. In addition, the isotope effect on surface recombination coefficient between D and T was shown to be explained using a modified solution model as well as diffusion.

Journal Articles

Influence of superfluidity on recombination reactions of H+T$$rightarrow$$HT and T+T$$rightarrow$$T$$_{2}$$ in $$^{3}$$He-$$^{4}$$He quantum media under saturated vapor pressure at 1.6 K

Aratono, Yasuyuki; Iguchi, Kazunari; Okuno, Kenji*; Kumada, Takayuki

Journal of Physical Chemistry A, 107(19), p.3741 - 3746, 2003/05

 Times Cited Count:4 Percentile:12.38(Chemistry, Physical)

An influence of superfluidity on recombination reactions of H+T$$rightarrow$$HT, T+T$$rightarrow$$T$$_{2}$$ in $$^{3}$$He-$$^{4}$$He quantum media was studied under saturated vapor pressure at 1.6 K. A change of reaction mechanism was observed at transition point from normalfluid to superfluid phase. Tunneling reaction mechanism by H and T bubble atoms was proposed on the basis of large isotope effect.

Journal Articles

Review of soft X-ray laser researches and developments

Daido, Hiroyuki

Reports on Progress in Physics, 65(10), p.1513 - 1576, 2002/10

 Times Cited Count:176 Percentile:75.51(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Polarization of photons emitted in radiative electron capture by bare high-Z ions

Eichler, J.*; Ichihara, Akira

Physical Review A, 65(5), p.052716_1 - 052716_5, 2002/05

 Times Cited Count:18 Percentile:62.62(Optics)

no abstracts in English

Journal Articles

Angle-differential cross sections for radiative recombination and the photoelectric effect in the ${it K, L,}$ and ${it M}$ shells of one-electron systems calculated within an exact relativistic description

Ichihara, Akira; Eichler, J.*

Atomic Data and Nuclear Data Tables, 79(2), p.187 - 222, 2001/11

 Times Cited Count:9 Percentile:54.72(Physics, Atomic, Molecular & Chemical)

no abstracts in English

Journal Articles

Theoretical study on dielectronic recombination of O$$^{6+}$$ ions in metastable states

Zhao, L.-B.*; Shirai, Toshizo

Physical Review A, 64(5), p.052704_1 - 052704_6, 2001/11

A computational scheme, based on the theory of continuum-bound transitions of Bell and Seaton [J. Phys. B $${bf 18}$$, 1589 (1985)] and the close-coupling R-matrix approach, has been developed to treat dielectronic recombination (DR) in high-lying resonance energy regions. This scheme and our presented numerical method to compute DR in low-lying resonance energy regions [Phys. Rev. A $${bf 62}$$, 022706 (2000)] have been applied together to elucidate the experimental spectra of DR of O$$^{6+}$$ ions in the metastable $$1s2s,,^3S$$ and $$1s2s,,^1S$$ states. For comparison, a perturbative theoretical calculation of DR for O$$^{6+}$$ has also been accompanied. The reasonable representation of the general dielectronic spectral shape is yielded by both our close-coupling and perturbative calculations. However, both the methods do not reproduce the experimental double peak structure at $$sim$$ 6-8 eV. This shows that the further investigation on DR of this kind of ions is required both experimentally and theoretically.

Journal Articles

Tritium permeation behavior implanted into pure tungsten and its isotope effect

Nakamura, Hirofumi; Hayashi, Takumi; Kakuta, Toshiya*; Suzuki, Takumi; Nishi, Masataka

Journal of Nuclear Materials, 297(3), p.285 - 291, 2001/09

 Times Cited Count:14 Percentile:70.96(Materials Science, Multidisciplinary)

The isotope effect on the implantation-driven permeation of pure tritium (T) and deuterium (D) through nickel was investigated, respectively. The rate-determining processes of backward flow at the upstream surface and permeation at the down-stream surface were found to be as follows: recombination on up-stream surface and diffusion at down-stream side in a lower temperature region, whereas recombination on both surfaces in a higher temperature region for T and D, respectively. The diffusion coefficients of T and D derived by analyzing the obtained transient data of permeation in the lower temperature region were in good agreement with literature data of deuterium. The obtained activation energy of diffusion for T and D suggested the tendency of mass dependence. The surface recombination coefficients for both isotopes were also derived and showed in good agreement with literature data. As a result, the experimental results indicated the surface recombination could be attributed to the isotope effect of the permeation between T and D rather than the diffusion.

Journal Articles

Strong relativistic effects on dielectronic recombination of metaotable Li$$^{+}$$ ions

Zhao, L.-B.; Shirai, Toshizo

Physical Review A, 63(1), p.703_1 - 703_4, 2001/01

no abstracts in English

Journal Articles

Multichordal charge exchange recombination spectroscopy on the JT-60U tokamak

Koide, Yoshihiko; Sakasai, Akira; Sakamoto, Yoshiteru; Kubo, Hirotaka; Sugie, Tatsuo

Review of Scientific Instruments, 72(1), p.119 - 127, 2001/01

 Times Cited Count:37 Percentile:84.49(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Cross sections for radiative recombination and the photoelectric effect in the K, L and M shells of one-electron systems with 1$$leq$$Z$$leq$$112 calculated within an exact relativistic description

Ichihara, Akira; Eichler, J.*

Atomic Data and Nuclear Data Tables, 74(1), p.1 - 121, 2000/01

 Times Cited Count:61 Percentile:92.21(Physics, Atomic, Molecular & Chemical)

no abstracts in English

Journal Articles

Collisional effects on population inversion in optical-field-ionized plasmas

Sagisaka, Akito*; Nagashima, Keisuke; Yamagiwa, Mitsuru; Matoba, Toru; *

Journal of the Physical Society of Japan, 68(4), p.1221 - 1227, 1999/04

 Times Cited Count:2 Percentile:26.58(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Spectrum analysis of three-body recombination rates for no-Maxwellian electron distributions under ultra-fast laser irradiation

Yamagiwa, Mitsuru; Koga, J. K.; Sagisaka, Akito*

Journal of Physics B; Atomic, Molecular and Optical Physics, 32(12), p.2881 - 2887, 1999/00

 Times Cited Count:0 Percentile:0.01(Optics)

no abstracts in English

Journal Articles

Spectroscopic study of the W-shaped divertor in JT-60U

Kubo, Hirotaka; Higashijima, Satoru; Takenaga, Hidenobu; Shimizu, Katsuhiro; Kumagai, Akira*; Ishijima, Tatsuo*; Suzuki, Shingo*; Itami, Kiyoshi; Sugie, Tatsuo; Sakasai, Akira; et al.

Proc. of 1998 ICPP & 25th EPS Conf. on Contr. Fusion and Plasma Physics, 22C, p.427 - 430, 1998/00

no abstracts in English

Journal Articles

Radiative electron capture and the photoelectric effect at high energies

Ichihara, Akira; Shirai, Toshizo; J.Eichler*

Physical Review A, 54(6), p.4954 - 4959, 1996/12

 Times Cited Count:32 Percentile:81.5(Optics)

no abstracts in English

Journal Articles

Photon angular distributions from radiative electron capture in relativistic atomic collisions

J.Eichler*; Ichihara, Akira; Shirai, Toshizo

Physical Review A, 51(4), p.3027 - 3035, 1995/04

 Times Cited Count:49 Percentile:90.34(Optics)

no abstracts in English

Journal Articles

L$$_{3}$$M$$_{4,5}$$M$$_{4,5}$$ spectator auger processes in 4d transition metal compounds

Yoshii, Kenji; Baba, Yuji; Sasaki, Teikichi

Journal of Electron Spectroscopy and Related Phenomena, 72, p.107 - 112, 1995/00

 Times Cited Count:12 Percentile:57.87(Spectroscopy)

no abstracts in English

JAEA Reports

Ion-driven permeation of deuterium in metals

W.Shu*; Okuno, Kenji; Hayashi, Yasunori*

JAERI-M 93-043, 62 Pages, 1993/03

JAERI-M-93-043.pdf:1.37MB

no abstracts in English

Journal Articles

Ion-driven permeation and surface recombination coefficient of deuterium for iron

Nagasaki, Takanori; Saido, Masahiro; ; Ono, Hideo

Journal of Nuclear Materials, 202, p.228 - 238, 1993/00

 Times Cited Count:9 Percentile:67.89(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Ion-driven permeation and surface recombination coefficient of deuterium for copper

Nagasaki, Takanori; ; Ono, Hideo

J. Vac. Sci. Technol., A, 10(1), p.170 - 179, 1992/01

no abstracts in English

Journal Articles

Ion-driven permeation and surface recombination coefficient of deuterium for silver

Nagasaki, Takanori; ; Ono, Hideo

Journal of Nuclear Materials, 195, p.324 - 328, 1992/00

 Times Cited Count:2 Percentile:54.43(Materials Science, Multidisciplinary)

no abstracts in English

31 (Records 1-20 displayed on this page)