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Cold Collisions of OH(2Π) Molecules with He Atoms in External Fields†.

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Title: Cold Collisions of OH(2Π) Molecules with He Atoms in External Fields†.
Authors: Pavlovic, Z.1, Tscherbul, T. V.1, Sadeghpour, H. R.1, Groenenboom, G. C.1, Dalgarno, A.1
Source: Journal of Physical Chemistry A. Dec2009, Vol. 113 Issue 52, p14670-14680. 11p.
Subjects: Collisions (Nuclear physics), Hydroxyl group, Helium spectra, Electric fields, Magnetic fields, Elastic scattering, Nuclear cross sections, Quantum theory
Abstract: We present rigorous quantum calculations for low-temperature collisions of OH(2Π) molecules with He atoms in the presence of external electric and magnetic fields. We show that electric fields of less than 15 kV/cm can be used to enhance the probability for Stark relaxation in collisions of OH (F1, J= 3/2, M= 3/2, f) molecules by 3 orders of magnitude. The inelastic cross sections display a pronounced resonance structure as a function of the electric field strength. We find that collisions of rotationally excited OH molecules become less sensitive to electric fields with increasing rotational excitation. The calculated total cross sections for 4He−OH are dominated by elastic scattering, increase monotonically with decreasing collision energy, and show no rapid variations near thresholds, at variance with recent experimental observations (Sawyer et al. Phys. Rev. Lett.2008, 101, 203203). [ABSTRACT FROM AUTHOR]
Copyright of Journal of Physical Chemistry A is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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PubTypeId: academicJournal
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  Data: Cold Collisions of OH(2Π) Molecules with He Atoms in External Fields†.
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  Data: <searchLink fieldCode="DE" term="%22Collisions+%28Nuclear+physics%29%22">Collisions (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroxyl+group%22">Hydroxyl group</searchLink><br /><searchLink fieldCode="DE" term="%22Helium+spectra%22">Helium spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+fields%22">Electric fields</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Elastic+scattering%22">Elastic scattering</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+cross+sections%22">Nuclear cross sections</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink>
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  Data: We present rigorous quantum calculations for low-temperature collisions of OH(2Π) molecules with He atoms in the presence of external electric and magnetic fields. We show that electric fields of less than 15 kV/cm can be used to enhance the probability for Stark relaxation in collisions of OH (F1, J= 3/2, M= 3/2, f) molecules by 3 orders of magnitude. The inelastic cross sections display a pronounced resonance structure as a function of the electric field strength. We find that collisions of rotationally excited OH molecules become less sensitive to electric fields with increasing rotational excitation. The calculated total cross sections for 4He−OH are dominated by elastic scattering, increase monotonically with decreasing collision energy, and show no rapid variations near thresholds, at variance with recent experimental observations (Sawyer et al. Phys. Rev. Lett.2008, 101, 203203). [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Physical Chemistry A is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1021/jp904512r
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Hydroxyl group
        Type: general
      – SubjectFull: Helium spectra
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      – SubjectFull: Electric fields
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      – SubjectFull: Nuclear cross sections
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      – SubjectFull: Quantum theory
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      – TitleFull: Cold Collisions of OH(2Π) Molecules with He Atoms in External Fields†.
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            NameFull: Pavlovic, Z.
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              Text: Dec2009
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              Y: 2009
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