Ionization Energy Difference between Isotopes and its Effect on Isotope Abundance Measurement by Surface Ionization Method
نویسندگان
چکیده
منابع مشابه
Fabrication of Free Air Well Type Ionization Chamber and Calculational Assessment and Measurement of Its Operational Characteristics
Introduction: Well type ionization chamber is a measuring device which is used to determine the activity of brachytherapy sources. The chamber has a cylindrical volume in which a cylindrical tube is mounted in the middle of the chamber. For the measurements, the brachytherapy sources are transferred to the middle of the tube. Materials and Methods: For designing the well type chamber, the measu...
متن کاملON IONIZATION EFFECTS AND ABUNDANCE RATIOS IN DAMPED Lyα SYSTEMS
The similarity between observed velocity structures of Al III and singly ionized species in damped Lyα systems (DLAs) suggests the presence of ionized gas in the regions where most metal absorption lines are formed. A simplified model consisting of Region 1) a plane-parallel ionization bounded region illuminated by an internal radiation field, and Region 2) a neutral region with a negligible me...
متن کاملMeasurement of isotopic ratios by resonance ionization mass spectrometry in the presence of optical isotope shifts
The determination of isotopic ratios by Resonance Ionization Mass Spectrometry (RIMS) requires a thorough characterisation of laser induced isotope effects. Besides the widely discussed odd-even effects (Fairbanks et al.l989,Lambropoulos et al.1989, Payne et al. 1991, Wunderlich et al 1992 a,b) there have also been reports of laser induced shifts in even-even isotopic ratios (Joung et al., 1990...
متن کاملTheory of Gas Ionization by Intense Electromagnetic Fields
The distribution function of the electrons produced in the interaction between an intense electromagnetic wave and a neutral gas is derived and is shown to be nonequilibrium and anisotropic. By assuming that the time scale of gas ionization is much greater than the field period, it is shown that the electron distribution function formed in microwave and optical discharges has sharp anisotropy a...
متن کاملComment on the ionization energy of B2F4.
The Gn test sets(1) of accurate (uncertainty ≤ 1 kcal mol–1 ≈ 4 kJ mol–1) experimental data are widely employed in the development and assessment of quantum chemistry procedures. However, while all the data in the Gn sets nominally carry a sub-kcal mol–1 uncertainty, several of the experimental values show uncharacteristically large discrepancies when compared with values determined by high-lev...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Mass Spectrometry Society of Japan
سال: 1969
ISSN: 1884-3271,1340-8097
DOI: 10.5702/massspec1953.17.643