vibrational and hyperfine coupling effects in (hi) 2 s. p. belov, f. willaert, b. a. mcelmurry, r....
DESCRIPTION
The hydrogen halide dimers family (HF) 2 (HCl) 2 (HBr) 2 (HI) 2 Dyke, Howard, and Klemperer, J. Chem. Phys. 56, 2442 (1972) Schuder, Lovejoy, and Nesbitt, J. Chem. Phys. 99, 4346 (1993) Chen, Hight Walker, Novick, and Tao, J. Chem. Phys. 106, (1997) Castillo-Chara, McIntosh, Wang, Lucchese, and Bevan, J. Chem. Phys. 120, (2004) Present investigation.TRANSCRIPT
Vibrational and Hyperfine Coupling
Effects in (HI)2
S. P. Belov, F. Willaert, B. A. McElmurry,R. R. Lucchese, J. W. Bevan,
L. H. Coudert, and J. T. Hougen
Overview
•Interesting from the chemical point of view
•Analysis of the microwave data recorded at Texas A&M University
•Interesting from the physical point of view
•Hyperfine-rotational-vibrational energy levels
The hydrogen halide dimers family
(HF)2(HCl)2 (HBr)2 (HI)2
Dyke, Howard, and Klemperer, J. Chem. Phys. 56, 2442 (1972)
Schuder, Lovejoy, and Nesbitt, J. Chem. Phys. 99, 4346 (1993)
Chen, Hight Walker, Novick, and Tao, J. Chem. Phys. 106, 10386 (1997)Castillo-Chara, McIntosh, Wang, Lucchese, and Bevan,J. Chem. Phys. 120, 10426 (2004)
Present investigation.
The interconversion geared-type motion
The potential energy function V()
(HF)2(HCl)2 (HBr)2 (HI)2
E 0.66 15.5 15.0 17.1
Dyke, Howard, and Klemperer, J. Chem. Phys. 56, 2442 (1972)Schuder, Lovejoy, Lascola, and Nesbitt, J. Chem. Phys. 99, 4346 (1993)Castillo-Chara, McIntosh, Wang, Lucchese, and Bevan, J. Chem. Phys. 120, 10426 (2004)
The very large quadrupole moment
The iodine nucleus has a very large quadrupole moment.
The very large quadrupole coupling
The HI molecule displays a very large electric quadrupolecoupling constant.1
1. Chance, Varberg, Park, and Zink, J. Mol. Spec. 162, 120 (1993)
Accounting for the large quadrupole coupling
J matrix elements
I2 Hanes, Lapierre, Bunker, and Shotton, J. Mol. Spec. 39, 506 (1971)
v matrix elements
Hyperfine coupling Hamiltonian
Hyperfine coupling matrix elements
(CH2NH2)2 Merke and Coudert, J. Mol. Spec. 237, 174 (2006)
The measurements
Paper WJ02, McElmurry, Wang, Lucchese, Bevan, and Belov, Columbus 2006
The R(0), v transition
RMS 18 kHz Without v1 matrix elements, RMS 36 kHz
Spectroscopic constants
The R(3), v transition
Spin-rotation: I·J
Quadrupole distortion: J2, Q:V}