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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: 2018-08-172018-12-12
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