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Title:AMMONIA AT 106 V/CM IN AN 8K ARGON MATRIX: POLARIZATION, ORIENTATION, AND PENDULARIZATION
Author(s):Field, Robert W.
Contributor(s):Kang, Heon; Park, Youngwook
Subject(s):Fundamental interest
Abstract:The $\nu$$_{2}$ band of NH$_3$ and ND$_{3}$ in solid Ar at 8K inside an ice-film nanocapacitor is observed by reflection-absorption infrared spectroscopy (RAIRS). Ammonia is an almost-free rotor in the Ar matrix. As the electric field is increased up to 1x10$^{6}$ V/cm, the spectrum undergoes a sequence of (reversible) changes driven by two kinds of Stark effect: mixing of inversion doublet components (for K$_{c}$$\geq$ 1) and c-dipole type $\Delta$K=0, $\Delta$J=$\pm$1 J-mixing. Mixing of inversion doublets results in quenching of the inversion dynamics and J-mixing leads toward pendularization. H vs. D nuclear permutation symmetry effects are clearly visible in the spectrum. At 10$^6$ V/cm and 8 K, the Stark interaction energy, $\mu$E = 25 cm$^{-1}$, is larger than kBT = 5.6 cm$^{-1}$ and intermediate between the inversion splittings in the NH$_3$ v=0 and v$_{2}$=1 levels, 0.79 and 36.5 cm$^{-1}$. This frequency domain spectrum in a scanned DC electric field encodes a more complete dynamical picture than experiments in which an extremely high electric field is generated by a focused ultrafast laser pulse.\\ \\ Samsung Science and Technology Foundation (SSTF-BA1301-04)
Issue Date:06/22/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100749
DOI:10.15278/isms.2018.FD08
Other Identifier(s):FD08
Date Available in IDEALS:2018-08-17
2018-12-12


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