The Experts below are selected from a list of 23247 Experts worldwide ranked by ideXlab platform
Luciano Fusina - One of the best experts on this subject based on the ideXlab platform.
-
High-sensitivity detection of the rotation spectrum of HCl in the v = 1 State by tunable FIR spectroscopy
Chemical Physics Letters, 1997Co-Authors: P. De Natale, Massimo Inguscio, Luca Lorini, G. Di Lonardo, Luciano FusinaAbstract:Abstract We have observed in absorption 14 roatational transitions in the first Excited Vibrational State of H35Cl and H37Cl. A tunableB FIR spectrometer was used with a mulmtiple-pass cell to improve the sensitivity. Transitions with J″ ranging from 2 to 8 were recorded, with Doppler resolution, in the region between 1.8 and 5.5 THz and their frequencies were measured with an average accuracy of several parts in 108. These transition were analysed together with high J rotational transitions previously measured in emissiion in the infrared on the basis of an effective Hamiltonian, which includes terms up to the eight power in the angular momentum.
P. De Natale - One of the best experts on this subject based on the ideXlab platform.
-
High-sensitivity detection of the rotation spectrum of HCl in the v = 1 State by tunable FIR spectroscopy
Chemical Physics Letters, 1997Co-Authors: P. De Natale, Massimo Inguscio, Luca Lorini, G. Di Lonardo, Luciano FusinaAbstract:Abstract We have observed in absorption 14 roatational transitions in the first Excited Vibrational State of H35Cl and H37Cl. A tunableB FIR spectrometer was used with a mulmtiple-pass cell to improve the sensitivity. Transitions with J″ ranging from 2 to 8 were recorded, with Doppler resolution, in the region between 1.8 and 5.5 THz and their frequencies were measured with an average accuracy of several parts in 108. These transition were analysed together with high J rotational transitions previously measured in emissiion in the infrared on the basis of an effective Hamiltonian, which includes terms up to the eight power in the angular momentum.
O. N. Ulenikov - One of the best experts on this subject based on the ideXlab platform.
-
an analysis of a superweak absorption spectrum of the so2 molecule using the variational procedure
Russian Physics Journal, 2010Co-Authors: E. S. Bekhtereva, O. N. UlenikovAbstract:The high resolution structure of a superweak 2ν 1 +ν 2 +ν 3 −ν 2 band of sulfur dioxide, SO 2 , is for the first time recorded with a Bruker IFS-120 HR Fourier spectrometer and analyzed using a specially derived procedure and a relevant computer code. As a result of the analysis, 115 lines have been found in the recorded spectrum, which allowed us to obtain high-accuracy values of the Vibrational energy and rotational parameters of the highly Excited Vibrational State, (211).
-
An analysis of a superweak absorption spectrum of the SO_2 molecule using the variational procedure
Russian Physics Journal, 2010Co-Authors: E. S. Bekhtereva, O. N. UlenikovAbstract:The high resolution structure of a superweak 2ν_1+ν_2+ν_3−ν_2 band of sulfur dioxide, SO_2, is for the first time recorded with a Bruker IFS-120 HR Fourier spectrometer and analyzed using a specially derived procedure and a relevant computer code. As a result of the analysis, 115 lines have been found in the recorded spectrum, which allowed us to obtain high-accuracy values of the Vibrational energy and rotational parameters of the highly Excited Vibrational State, (211).
Marco Zoppi - One of the best experts on this subject based on the ideXlab platform.
-
Rotational and Vibrational excitations in solid parahydrogen
Physical Review B, 1998Co-Authors: Massimo Moraldi, Mario Santoro, Lorenzo Ulivi, Marco ZoppiAbstract:Measurements of the ${S}_{0}(0)$ triplet and of the double rotoVibrational ${Q}_{1}{(0)+S}_{0}(0)$ Raman transition in solid hydrogen at different densities are presented. The frequency separations of the three ${S}_{0}(0)$ components are used to obtain an estimate of the motional renormalization coefficient for the quadrupole-quadrupole interaction of two molecules in the ground Vibrational State. With such an information the interaction in the first Excited Vibrational State can be obtained from the intensity of the double rotoVibrational transition.
Walther Caminati - One of the best experts on this subject based on the ideXlab platform.
-
keto enol tautomerism and conformational landscape of 1 3 cyclohexanedione from its free jet millimeter wave absorption spectrum
Journal of Physical Chemistry A, 2013Co-Authors: Camilla Calabrese, Assimo Maris, Luca Evangelisti, Laura B Favero, Sonia Melandri, Walther CaminatiAbstract:The free jet millimeter-wave absorption spectrum of 1,3-cyclohexanedione has been investigated in the 59.6–74.4 GHz frequency range, and the rotational spectra of two conformational species, the chair-diketo and boat-diketo, and probably one Excited Vibrational State belonging to the chair-diketo form have been assigned. Quantum chemical calculations, performed at the B3LYP/6-311++G** and MP2/6-311++G** levels, were used to characterize the potential energy surface minima. The potential energy surface related to the interconversion of the observed diketonic species was modeled at the DFT level.