Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Douglas E. Goeringer"'
Publikováno v:
Rapid Communications in Mass Spectrometry. 23:3781-3786
The operational characteristics and imaging performance are described for a new instrument comprising an atomic force microscope coupled with a pulsed laser and a linear ion trap mass spectrometer. The operating mode of the atomic force microscope is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::632453d533ab2beabbf44704351baa41
https://doi.org/10.1002/rcm.4313
https://doi.org/10.1002/rcm.4313
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 39:3993-4013
This paper extends to molecules the moment theory of ion traps and similar devices where the electric fields vary with both position and time. It is based on the Wang Chang–Uhlenbeck–de Boer equation and a series of successive approximations base
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9697d0710eea7cec260a140e6a5d657
https://doi.org/10.1088/0953-4075/39/20/001
https://doi.org/10.1088/0953-4075/39/20/001
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 39:4015-4035
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53e4ec631f13fe70c40e3f48bf4c9506
https://doi.org/10.1088/0953-4075/39/20/002
https://doi.org/10.1088/0953-4075/39/20/002
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 38:4027-4044
The two-temperature moment theory of ion motion in devices where the external fields vary with position and time is applied to ideal quadrupole ion traps. In first approximation, the theory gives differential equations with collision frequencies that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6854c932b560238f7a8216fff00cf0a7
https://doi.org/10.1088/0953-4075/38/22/008
https://doi.org/10.1088/0953-4075/38/22/008
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 38:3987-4009
This paper extends the momentum-transfer theory of drift tubes to ion traps and similar devices where the electric fields vary with both position and time. The collision frequencies that are incorporated into two-temperature and multi-temperature mom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b82cbc7efc3fe46220712846d2fc2b4d
https://doi.org/10.1088/0953-4075/38/22/006
https://doi.org/10.1088/0953-4075/38/22/006
Autor:
Loren Hauser, Manesh Shah, Nathan C Verberkmoes, Frank W. Larimer, Miriam Land, W. Judson Hervey, Douglas E. Goeringer, Gary J. Van Berkel
Publikováno v:
Analytical Chemistry. 77:923-932
There is currently a great need for rapid detection and positive identification of biological threat agents, as well as microbial species in general, directly from complex environmental samples. This need is most urgent in the area of homeland securi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b52ee7aeb2df3d28b4032a5ae24d223
https://doi.org/10.1021/ac049127n
https://doi.org/10.1021/ac049127n
Publikováno v:
The Journal of Chemical Physics. 120:9090-9103
A kinetic theory based on the Boltzmann equation is developed for the trapping of atomic ions in a radio-frequency quadrupole ion trap containing enough neutral atoms that ion-neutral collisions cannot be ignored. The collisions are treated at the sa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2719a54d960372e530262f60962aa6a
https://doi.org/10.1063/1.1691405
https://doi.org/10.1063/1.1691405
Autor:
Douglas E. Goeringer
Publikováno v:
Journal of the American Society for Mass Spectrometry. 14:1315-1326
A kinetic model is developed for the dynamic events occurring within an atmospheric sampling glow discharge that affect its performance as an ion source for analytical mass spectrometry. The differential equations incorporate secondary electron gener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69965b139e0850af6ab34813deacc11a
https://doi.org/10.1016/s1044-0305(03)00575-0
https://doi.org/10.1016/s1044-0305(03)00575-0
Publikováno v:
International Journal of Mass Spectrometry. 216:85-93
Collision-induced dissociation (CID) rates are measured for a suite of lanthanide (plus yttrium) monoxide ions stored in a quadrupole ion trap. Yttrium, neodymium, and gadolinium oxides, having the same nominal dissociation energy (D0 ≈ 735 kJ mol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb69cb0376a3a42f2d30ffbfdb0e41fa
https://doi.org/10.1016/s1387-3806(02)00549-3
https://doi.org/10.1016/s1387-3806(02)00549-3
Publikováno v:
The Journal of Physical Chemistry A. 105:1882-1889
Dissociation of the tantalum oxide cation, a strongly bound diatomic, is simulated for the multiple-collision environment of a quadrupole ion trap mass spectrometer using a model based on thermal unimolecular reaction theory. The intact diatomic ion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8100cd072bd3e0244d83342091c819bc
https://doi.org/10.1021/jp0040289
https://doi.org/10.1021/jp0040289