State-to-State Rotational Translational Relaxation Rate Constants for CO-He: An Evaluation of the Theoretical Intermolecular Potential Surfaces Using Infrared-Infrared Double Resonance

2003 ◽  
Author(s):  
Tony Smith ◽  
David Hostutler ◽  
Gordon Hager ◽  
Michael Heaven
Keyword(s):  
Relaxation Rate ◽  
Rate Constants ◽  
Double Resonance ◽  
Intermolecular Potential ◽  
Potential Surfaces

scholarly journals State-to-state rotational relaxation rate constants for CO+Ne from IR–IR double-resonance experiments: Comparing theory to experiment

2004 ◽  
Vol 120 (16) ◽  
pp. 7483-7489 ◽  
Author(s):  
David A. Hostutler ◽  
Tony C. Smith ◽  
Gordon D. Hager ◽  
George C. McBane ◽  
Michael C. Heaven
Keyword(s):  
Relaxation Rate ◽  
Rate Constants ◽  
Double Resonance ◽  
Rotational Relaxation

Investigation of the state-to-state rotational relaxation rate constants for carbon monoxide (CO) using infrared double resonance

2002 ◽  
Vol 116 (21) ◽  
pp. 9281-9292 ◽  
Author(s):  
Steve P. Phipps ◽  
Tony C. Smith ◽  
Gordon D. Hager ◽  
Michael C. Heaven ◽  
J. K. McIver ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Relaxation Rate ◽  
Rate Constants ◽  
Double Resonance ◽  
The State ◽  
Rotational Relaxation

Mechanism and Structure in the Ion Chemistry of Tetramethyldiphosphine: An Ion Cyclotron Resonance Spectrometric Study

1976 ◽  
Vol 31 (5) ◽  
pp. 414-421 ◽  
Author(s):  
Karl-Peter Wanczek
Keyword(s):  
Mass Spectrum ◽  
Rate Constants ◽  
Cyclotron Resonance ◽  
Double Resonance ◽  
Ion Cyclotron Resonance ◽  
Spectrometric Study ◽  
Ion Chemistry ◽  
Ion Molecule Reactions ◽  
Ion Cyclotron ◽  
Ion Cyclotron Resonance Spectrometry

Abstract The mass spectrum of tetramethyldiphosphine and the ion chemistries of this compound and of its mixtures with phosphine and dimethylphosphine have been investigated by ion cyclotron resonance spectrometry. Numerous ion molecule reactions have been observed. The rate constants of the two most abundant ions formed by the molecular ion, the tetramethyldiphosphonium ion, H(CH3)2P-P(CH3)2+ and the hexamethyltriphosphonium ion, P3(CH3)6+ , are k2.35≦0.1X10-10 cm3 molecule-1 s-1 and k2.40 = 1.5 X10-10 cm3 molecule -1 s -1 respectively. The structures of several ions have been determined with the aid of their ion-molecule reactions. The ions m/e = 79 and 93 are thought to have the structures HP - P(CH3)H+ and HP-P(CH3)2+ . The most probable structures of the ions m/e = 169 and 183 are HP(CH3)2-P(CH3)-P(CH3)2+ and (CH3)2P-P(CH3) - P(CH3)3+ . The protonated molecule undergoes several ion-molecule reactions, which proceed via an intermediate, m/e = 183, [(CH3)6P3+]* which is detected by double resonance experiments.

scholarly journals Frequency offset dependence of adiabatic rotating frame relaxation rate constants: relevance to MRS investigations of metabolite dynamics in vivo

2011 ◽  
Vol 24 (7) ◽  
pp. 807-814 ◽  
Author(s):  
Silvia Mangia ◽  
Timo Liimatainen ◽  
Michael Garwood ◽  
Ivan Tkac ◽  
Pierre-Gilles Henry ◽  
...  
Keyword(s):  
Relaxation Rate ◽  
Rate Constants ◽  
Frequency Offset ◽  
Rotating Frame ◽  
Rotating Frame Relaxation
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