JOPSS - Search Results

Journal Articles

Experimental study of Gamow-Teller transitions via the high-energy-resolution $^{18}$ O(He,) $^{18}$ F reaction; Identification of the low-energy "super" -Gamow-Teller state

Fujita, Hirohiko*; Fujita, Yoshitaka*; Utsuno, Yutaka; Yoshida, Kenichi*; Adachi, Tatsuya*; Algora, A.*; Csatls, M.*; Deaven, J. M.*; Estevez-Aguado, E.*; Guess, C. J.*; et al.

Physical Review C, 100(3), p.034618_1 - 034618_13, 2019/09

AA2019-0318.pdf:1.1MB

https://doi.org/10.1103/PhysRevC.100.034618

Times Cited Count：12 Percentile：76.6(Physics, Nuclear)

no abstracts in English

Journal Articles

A Quasiclassical trajectory calculation to compute the reaction cross section and thermal rate constant for the cesium exchange reaction $^{133}$ CsI + $^{135}$ Cs $^{133}$ Cs + I $^{135}$ Cs

Kobayashi, Takanori*; Matsuoka, Leo*; Yokoyama, Keiichi

Computational and Theoretical Chemistry, 1150, p.40 - 48, 2019/02

https://doi.org/10.1016/j.comptc.2019.01.008

Times Cited Count：1 Percentile：1.99(Chemistry, Physical)

One of important research targets in the development of cesium isotope separation system is design of recovery process of cesium atom. Relevant to this research target, the reaction cross section and reaction rate constant of a cesium exchange reaction through collision of the cesium iodide molecules with cesium atoms are calculated by a quasi-classical trajectory calculation based on a potential energy surface obtained by quantum chemistry calculations. Consequently, the rate constant is calculated to be 3.6 10 $^{-10}$ cm $^{3}$ molecule $^{-1}$ s $^{-1}$ , as large as collision rate in the present condition. In addition, slightly positive temperature dependence is observed in the rate constant. This behavior is explained with the long-range attractive force and effect of subsequent dissociation process.

Journal Articles

A Quasi-classical trajectory calculation for the cesium exchange reaction of $^{133}$ CsI (v = 0, j = 0) + $^{135}$ Cs $^{133}$ Cs + I $^{135}$ Cs

Kobayashi, Takanori*; Matsuoka, Leo*; Yokoyama, Keiichi

Nihon Enerugi Gakkai-Shi, 96(10), p.441 - 444, 2017/10

https://doi.org/10.3775/jie.96.441

To investigate the reaction cross section of the cesium exchange reaction of $^{133}$ CsI (v = 0, j = 0) + $^{135}$ Cs $^{133}$ Cs + I $^{135}$ Cs, we performed quasi-classical trajectory calculations on the potential energy surface calculated by the ab initio molecular orbital theory. The potential energy surface shows that intermediate Cs $_{2}$ I is formed without entrance barrier and has two equivalent Cs-I bonds. The reaction cross sections decrease monotonically with increasing collision energy. The rate constant k (v = 0, j = 0) was estimated to be about 310 $^{-10}$ cm $^{3}$ molecule $^{-1}$ s $^{-1}$ at temperatures ranging from 500 to 1200K and a slight negative temperature dependence was observed.

JAEA Reports

Theoretical study of the Cs isotope exchange reaction of CsI + Cs' Cs + ICs' (Contract research)

Kobayashi, Takanori; Hashimoto, Masashi; Yokoyama, Keiichi

JAEA-Research 2015-014, 7 Pages, 2015/12

JAEA-Research-2015-014.pdf:2.46MB

To discuss the exchange reaction of Cs isotope by CsI + Cs' Cs + ICs', the structure and chemical properties of CsI intermediate and potential energy surface are calculated using M06/def2-TZVPPD density functional calculation. The calculation shows that the reaction to the intermediate has no barrier and the two Cs-I bonds of CsI are chemically equivalent. Thus, the collision of CsI + Cs' results in Cs exchange with the high probability.

Journal Articles

Ab initio study on isotope exchange reactions of H $_{2}$ with surface hydroxyl groups in lithium silicates

Nakazawa, Tetsuya; Yokoyama, Keiichi; Grismanovs, V.*; Katano, Yoshio*; Jitsukawa, Shiro

Journal of Nuclear Materials, 307-311(Part2), p.1436 - 1440, 2002/12

https://doi.org/10.1016/S0022-3115(02)01283-7

Times Cited Count：1 Percentile：10.13(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Ab initio study on the mechanism of hydrogen release from the silicate surface in the presence of water molecule

Nakazawa, Tetsuya; Yokoyama, Keiichi; Grismanovs, V.*; Katano, Yoshio*; Jitsukawa, Shiro

Journal of Nuclear Materials, 302(2-3), p.165 - 174, 2002/04

https://doi.org/10.1016/S0022-3115(02)00779-1

Times Cited Count：3 Percentile：23.39(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

An ab initio study on formation and desorption reactions of H $_{2}$ O molecules from surface hydroxyl groups in silicates

Nakazawa, Tetsuya; Yokoyama, Keiichi; Grismanovs, V.*; Katano, Yoshio*

Journal of Nuclear Materials, 297(1), p.69 - 76, 2001/07

https://doi.org/10.1016/S0022-3115(01)00584-0

Times Cited Count：9 Percentile：56.04(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Structural and magnetic studies of the lanthanide deficient perovskite Ce $_{2/3}$ TiO $_{3}$

Yoshii, Kenji

Journal of Alloys and Compounds, 305(1-2), p.72 - 75, 2000/06

https://doi.org/10.1016/S0925-8388(00)00699-X

Times Cited Count：13 Percentile：61.56(Chemistry, Physical)

no abstracts in English

Journal Articles

Charge-exchange reactions with a secondary triton beam

Sherrill, B. M.*; Akimune, Hidetoshi; Austin, S. M.*; Bazin, D.*; Van den Berg, A. M.*; Berg, G. P. A.*; Caggiano, J.*; Daito, Izuru*; Fujimura, Hisako*; Fujita, Yoshitaka*; et al.

Nuclear Instruments and Methods in Physics Research A, 432(2-3), p.299 - 304, 1999/08

https://doi.org/10.1016/S0168-9002(99)00518-5

Times Cited Count：39 Percentile：91.81(Instruments & Instrumentation)

no abstracts in English

Journal Articles