Articles you may be interested inPerturbation facilitated optical-optical double resonance spectroscopy of the 23Σ+ g , 33Σ+ g , and 43Σ+ g Rydberg states of 7Li2 A pulsed optical-optical double resonance study of the 11Π g state of 7Li2A study of the E 1Σ+ g state of 7Li2 by pulsed optical-optical double resonance spectroscopy Three Rydberg series of electronic states of 7Li2 have been characterized by pulsed optical-optical double resonance spectroscopy. The observed Rydberg states, which include the previously reported E 'I,+ and G 'n, states, have been identified as 3-1Osu 'I,+,+, In,. The molecular constants for several of the upper members of each of the above series have been used to deduce the ionization potential of 7Li2 and molecular constants for the X 2I,+ state of 7Lit. The former was determined to be T o( 00 ) = 41 496 ± 4 cm -I. The latter were found to be in good agreement with recent ab initio calculations.

A detailed study of the polymer statistics for a reaction system resembling the ethylene oxide initiator case is made allowing for different rates of initiation ki and propagation kp. The modified Poisson distribution that results necessitates evaluation of rather complicated summations in order to characterize the number x̄n and weight average x̄w molecular weights. It is found that r = kp/ki as large as 106 still does not shift (x̄w/x̄n)max beyond the range 1.3 to 1.4. But under any circumstance, depletion of monomer assures homogeneous polymers, regardless of r.

Articles you may be interested inThe microwave spectrum, dipole moment, and barrier to internal rotation of 3methyl2butenenitrile J. Chem. Phys. 77, 5885 (1982); 10.1063/1.443862Microwave spectrum, molecular structure, barrier to internal rotation, and dipole moment of methyl monofluorogermaneThe microwave spectrum of methyl vinyl ether, CHaOCH=CH2, has been studied in the frequency region 8 to 40 Gc/sec. Absorption lines have been assigned to a planar cis isomer, with a barrier to internal rotation of the methyl group of 3830±100 cal/mole. The components of the dipole moment along the principal axes of inertia were measured and found to be 1-'.=0.294 D, 1-'.=0.915 D (I-' total =0.96 D). Spectra were observed of the excited methyl torsional state and of two additional excited vibrational states, corresponding, respectively, to vibrations at about 240, 205, and 327 cm-l . These findings are confirmed by far-infrared and Raman spectra.