Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
500
C) under electric fieldBaba, Yuji; Shimoyama, Iwao
e-Journal of Surface Science and Nanotechnology (Internet), 16, p.53 - 59, 2018/03
Surface ionization for cesium chloride and Cs-adsorbed soil has been investigated. For cesium chloride, neutral cesium was desorbed around 645C which is close to the melting point of cesium. While Cs
ion was desorbed from 400C. The ratio of desorbed ions and neutrals (Cs/Cs
) has a maximum around 410 C. Temperature dependence of Cs/Cs was analyzed using Saha-Langmuir equation, As a result, it was found that the temperature maximum is due to the changes of the surface work function induced by the phase transition of CsCl.
; ;
JAERI-M 7303, 12 Pages, 1977/10
no abstracts in English
Asai, Masato; Sato, Tetsuya; Kaneya, Yusuke
no journal, ,
To experimentally determine the first ionization energy of element 103, Lr, we have newly developed a surface ionization method and have investigated its feasibility. We have measured surface ionization efficiencies of various lanthanide elements as a function of the first ionization energy, and investigated whether the surface ionization efficiencies can be reproduced by the Saha-Langmuir equation which is the equation to describe the surface ionization process. We have found that the effect of excited states in atom and ion largely contributes to the surface ionization efficiency in the Saha-Langmuir equation. By taking account of this effect, we have reproduced the measured ionization efficiencies of all the lanthanide elements with good accuracies.
Kaneya, Yusuke*; Asai, Masato; Sato, Tetsuya; Tomitsuka, Tomohiro; Tsukada, Kazuaki; Toyoshima, Atsushi; Mitsukai, Akina; Makii, Hiroyuki; Hirose, Kentaro; Osa, Akihiko; et al.
no journal, ,
To study the influence of the valence 7p
electronic orbital on chemical properties of lawrencium, a measurement of the adsorption enthalpy of lawrencium was carried out. A new method using a surface ionization technique coupled to an on-line isotope separator was developed, which enabled one to measure temperature dependence of lawrencium surface adsorption on a metallic tantalum surface at high temperature up to 2800 K. The temperature dependences of adsorption of lawrencium as well as various lanthanide elements were investigated with this method, and the adsorption enthalpy of lawrencium was successfully extracted.
