A variable temperature-selected ion flow drift tube (VT-SIFDT) has been used to measure the mobilities of clusters drifting in He. The mobilities have been measured for at 298 K, at 200 K, and at 100 K, marking the first mobilities experiments for these clusters below room temperature. The reduced mobilities measured at 298 K are compared to the previous SIFDT results of Krishnamurthy et al. [J. Chem. Phys. 106, 530 (1997)] for While the current results compare quite favorably for there is a discrepancy for which is addressed by current 100 K and 200 K data where these species are thermally stable. The trends in the mobilities from 100 K to 298 K as a function of E/N and effective temperature reveal that the repulsive part of the interaction potential is sampled predominantly for However, the attractive part of the potential is accessed at the lowest temperatures for
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8 April 2001
Research Article|
April 08 2001
Mobilities of clusters in helium from 100 K to 298 K
Anthony J. Midey;
Anthony J. Midey
Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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A. A. Viggiano
A. A. Viggiano
Air Force Research Laboratory, Space Vehicles Directorate, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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J. Chem. Phys. 114, 6072–6076 (2001)
Article history
Received:
November 27 2000
Accepted:
January 18 2001
Citation
Anthony J. Midey, A. A. Viggiano; Mobilities of clusters in helium from 100 K to 298 K. J. Chem. Phys. 8 April 2001; 114 (14): 6072–6076. https://doi.org/10.1063/1.1354136
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