Zobrazeno 1 - 10
of 164
pro vyhledávání: '"Larry A Viehland"'
Publikováno v:
Frontiers in Chemistry, Vol 8 (2020)
The current status of gaseous transport studies of the singly-charged lanthanide and actinide ions is reviewed in light of potential applications to superheavy ions. The measurements and calculations for the mobility of lanthanide ions in He and Ar a
Externí odkaz:
https://doaj.org/article/2917982b0a7945e4a1ad1901635af843
Publikováno v:
Physical Chemistry Chemical Physics. 24:7144-7163
RCCSD(T) potentials for Si+ and Ge+ interacting with RG atoms (RG = He–Rn) are presented, including extrapolating to the basis set limit and spin–orbit coupling. These potentials are used to derive spectroscopic and ion transport parameters.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::386b5de019c03547cf345cd6178e6c98
https://doi.org/10.1039/d1cp05710c
https://doi.org/10.1039/d1cp05710c
Autor:
William Pfalzgraff, Aaron D. Trout, Michelle Cordier, Delenn Fingerlow, Larry A. Viehland, J. Dashdorj
Publikováno v:
International Journal for Ion Mobility Spectrometry. 23:143-151
It has recently been shown that accurate theoretical calculations can be used to calibrate a drift-tube mass spectrometer (DTMS) to measure gaseous ion mobilities accurate to within 0.6%. Here we present a new method for calibrating a DTMS instrument
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b30f2ffe471199681d55a4ac0296e1be
https://doi.org/10.1007/s12127-020-00258-z
https://doi.org/10.1007/s12127-020-00258-z
Publikováno v:
Physical chemistry chemical physics : PCCP. 24(11)
Accurate interatomic potentials were calculated for the interaction of a singly-charged silicon cation, Si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::7b54285c4fc26466a39dde0d0ddf7abf
https://pubmed.ncbi.nlm.nih.gov/35274637
https://pubmed.ncbi.nlm.nih.gov/35274637
Publikováno v:
The Journal of chemical physics. 155(20)
Mobility and diffusion coefficients are generally extracted from experimental measurements of ion arrival time distributions using tensors of ranks one and two, i.e., in terms of the diffusion equation that is equivalent to Fick’s second law. The t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1279a120b764c8d6552c8c8265e88c5
https://pubmed.ncbi.nlm.nih.gov/34852469
https://pubmed.ncbi.nlm.nih.gov/34852469
Autor:
Rainer Johnsen, Larry A. Viehland
Publikováno v:
Journal of Geophysical Research: Atmospheres. 124:13593-13600
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::357e80751e7b8db21dbc7981e44026c1
https://doi.org/10.1029/2019jd031186
https://doi.org/10.1029/2019jd031186
Publikováno v:
International Journal of Mass Spectrometry. 443:86-92
The mobility of ground-state Gd+ ions in He and Ar gases is addressed theoretically to bridge the surprising gap between the experimental and previous theoretical data. An accurate ab initio coupled cluster approach is used to compute scalar-relativi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cdb190d28d153d31a0218d8b5215b3c
https://doi.org/10.1016/j.ijms.2019.06.005
https://doi.org/10.1016/j.ijms.2019.06.005
Autor:
Yongbin Chang, Larry A. Viehland
Publikováno v:
AIP Advances, Vol 1, Iss 3, Pp 032128-032128-21 (2011)
By introducing a cutoff on the cumulative measure of a force, a unified kinetic theory is developed for both rigid-sphere and inverse-square force laws. The difference between the two kinds of interactions is characterized by a parameter, γ, which i
Externí odkaz:
https://doaj.org/article/9fade19f223941578e467bd9b677b9b1
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 54:175202
The transport of NO+ ions moving through each of the rare gases under the influence of an electrostatic field has been studied using ab initio potential energy surfaces in a rigid rotor approximation, using both Monte Carlo techniques and various vel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12de650144444a1e2aa8dec07f8d06d1
https://doi.org/10.1088/1361-6455/ac2983
https://doi.org/10.1088/1361-6455/ac2983
Publikováno v:
International Journal for Ion Mobility Spectrometry. 20:95-104
It is shown that theoretical values of the mobility of atomic ions in gases can be used to calibrate a drift-tube mass spectrometer, leading to subsequent measurements that are accurate to 0.6% for He+ in He near room temperature as the ratio of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f672ec19a0528f62773955086fa24039
https://doi.org/10.1007/s12127-017-0220-0
https://doi.org/10.1007/s12127-017-0220-0