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·We show verification of our definition previously formulated for the average ion charge Z I of plasmas and liquid metals in the electron ion model for the case of the thermal ionization For Rb plasmas of temperatures 5 30 eV and ion density r s I = the form of the electron ion radial distribution function RDF determined by the conventional method shows
·DOI /S1387 3806 02 00551 1 Corpus ID 93938729; The thermal ionization cavity TIC source elucidation of possible mechanisms for enhanced ionization efficiency article{Wayne2002TheTI title={The thermal ionization cavity TIC source elucidation of possible mechanisms for enhanced ionization efficiency} author={David M Wayne and Wei
·Thermal ionization sources The most common type of thermal ionization source encountered in MS is that of the Cs primary ion source used regularly in secondary ion MS experiments It is a relatively simple source containing two main components the reservoir
·The Inductively Coupled Plasma A plasma is a hot partially ionized gas The ICP is an argon based radio frequency ICP is an argon based radio frequency plasma The input rf frequency is either 27 or 40 MHz at powers from 1 to 2 kW The plasma is formed and contained in a three tube The plasma is formed and contained in a three tube
·The spectrometer used was a magnetic sector thermal ionization mass spectrometer VG 354 from GV Instruments Manchester UK The source is equipped with a sixteen position turret assembly A glove box was added around the source in order to handle radioactive samples The detection system consisted of five Faraday collectors and a Daly
·Compared with the ICP ion source the thermal ionization ion source is energy limited and thus ionization is mostly limited to target elements with very few polyatomic ions
·It is well known that the thermal ionization energy determined by various temperature Hall effect measurements is slightly different from the actual ionization energy of impurity due to degeneracy We checked this difference using p 1/3 versus thermal ionization energy plot of the Mg doped p GaN
·Thermal Ionization Mass Spectrometer TIMS is an analytical tool for accurate isotope ratio measurement of elements Owing to its high sensitivity selectivity and precision it finds extensive applications in the field of nuclear industries and geochronology It consists of a thermal ionization source for ionization of the sample sector
·17 Thermal ionization mass spectrometrY Introduction Ion production Rubidium strontium isotope analysis Neodymium samarium isotope analysis Lead uranium and thorium isotope analysis Isotope dilution Introduction Thermal ionization mass spectrometry is a technique which
·and our complementary result on thermal ionization provide some qualitative un derstanding of two fundamental irreversible processes in atomic physics relaxation to a ground state and ionization by thermal radiation Next we describe the physical system analyzed in this paper somewhat more precisely; for further details see Section
·A novel method for the determination of ultra trace level 90Sr has been recently developed applying thermal ionization mass spectrometry TIMS The method includes the chemical separation of Zr
·Due to the thermal ionization effect more interstitial protons are generated from cation defects at high temperatures leading to the in crease in proton conductivity Comparing Calculated
U Pb geochronology by Isotope Dilution Thermal Ionization Mass Spectrometry ID TIMS is the gold standard for determining precise and accurate dates and rates of geological events throughout Earth s history Hanchar and Hoskin 2003; Bowring et al 2006; Schoene and Baxter 2017 The abundance of high U minerals in most rock types and the
·and thermal ionization processes R depends on the atomic structure of the defect and the strength of the interaction of trapped electrons with phonons Knowing the value of R for a certain type of defect would allow for example one to estimate the thermal emission energies from the optically measured values For small polarons in crystals
Thermal Ionization this page from the University of Arizona SAHRA program offers a brief description of thermal ionization Geochemistry of the World Wide Web this site from Cornell University provides links to geochemistry related websites including professional societies
（：thermal ionization mass spectrometry TI MS） 。LiU 。
·In order to make a single filament thermal ionization mass spectrometry TIMS instrument more versatile and efficient in element isotope analysis a multifilament ion source has to be employed In the currently used three filament ion sources the same sample must be loaded on all the evaporator filaments because of the possibility of cross
Thermal ionization mass spectrometry TIMS is designed to obtain high precision isotopic information Ions are created by passing a current through a thin metal ribbon or ribbons under vacuum The ions generated are accelerated under vacuum to a magnetic sector where the ions are separated according to their m/z ratio and a detection system
·High precision analysis of 182 W/ 184 W and 183 W/ 184 W by negative thermal ionization mass spectrometry Per integration oxide corrections using measured 18 O/ 16 O International Journal of Mass Spectrometry 414 80 86 doi /
·Using AIMD simulations the thermal ionization process of hydrogen at Mg and Fe defects is observed under the asthenosphere conditions while hydrogen is trapped at Si vacancy even at 2000 K The ionized hydrogen can be transported to a nearby hopping defect through interstitial sites
A mass spectrometric method based on the thermal ionization of lithium tetraborate has been developed for the isotopic analysis of lithium The measurement of Li/sub 2/BO/sub 2//sup / reduces isotopic fractionation during analysis compared to the normal use of Li/sup / ions The technique is capable of achieving a relative precision of per thousand 1sigma in the
·Developments in Negative Thermal Ionization Mass Spectrometry and its Applications Proc 37th ASMS Conf Mass Spectrometry and Allied Topics 1989 pp 414 416
·In addition to thermal ionization mass spectrometry TIMS he also discusses applications of ICP MS Furthermore alongside detailed protocols on sample preparation and mass spectrometric measurements numerous practical hints are given
Chemical Ionization CI In chemical ionization the sample is introduced to a chamber filled with excess reagent gas such as methane The reagent gas is ionized by electrons forming a plasma with species such as CH 5 which react with the sample to form the pseudomolecular ion [M H] Because CI does not involve radical reactions fragmentation of the sample is generally
