Alkaline earth monohalides

Support for the adopted value is provided by an examination of the trends in the dissociation energies for all alkaline earth monohalides and a comparison of the values for the ratio Aj H (MX, 298.15 (MXjj, 298.15 K) for the... 

HIGH RESOLUTION SPECTROSCOPY OF ALKALINE EARTH MONOHALIDES PERTURBATION ANALYSIS, HYPERFINE STRUCTURE AND STARK EFFECT... 

II. The polarization detection scheme allows a sensitivity increase by three to four orders of magnitude compared to sophisticated mw spectroscopy techniques, at the same resolution. Application of saturation modulation which is a nonlinear mw spectroscopy technique developed by Tdrring, permits the detection of about 10"° absorption of the incident mw intensity. This allows the study of rotational transitions of alkaline earth monohalides in the 100 to 300 GHz range, i.e. transitions between levels with high rotational quantum numbers in the case of strontium and barium monohalides. Then the hfs is not resolved because... 

Effusive beams of alkaline earth monohalides are generated from a high temperature reaction of the stable dihalide with the metal. Mw transitions have been observed with linewidths between 10 and 50 kHz,... 

The most recent example is the investigation of the ground state of Bal, the heaviest alkaline earth monohalide. For a long time the hfs in sub-Doppler spectra of the C n - system observed by Johnson et al. could not be Interpreted. A 5-GHz laser scan near the band origin of - x2z+ (0,0) is shown in Fig. 5. In this part of the spectrum... 

T. Torring, W.E. Ernst, and S. Kindt, Dipole moments and potential energies of the alkaline earth monohalides from an ionic model, J.Chem.Phys. 81 4614 (1984). 

Ibning T, Ernst W, Kandler J (1989) Energies and electric dipole moments of the low lying electronic states of the alkaline earth monohalides from an electrostatic polarization model. J Chem Phys 90 4927-4932... 

W.J. Childs The hyperfine structure of alkaline-earth monohalide radicals New methods and new results 1980-82. Comments At. Mol. Phys. 13, 37 (1983)... 

As is characteristic of the visible band systems of the alkaline-earth monohalide, the Av = 0 sequence has the highest intensity. In addition, the Av = -1 sequence appears also with relatively high intensity which hints at a preferred... 

The reactions of alkaline earth metal atoms with halogen molecules, either forming alkaline earth metal monohalides or leading to chemi-ionization, represent an important case study in the reaction dynamics of divalent systems [91, 92, 95-100]. Let us take as an example the reaction... 

It will be seen from this table that the monohalides of the inert gases all would be unstable to decomposition into their elements and so obviously could not exist in an ionic lattice. However this is not so for the other monohalides all of which, with the exception of BeCl, BeBr, and Bel, are stable with respect to decomposition to the elements. In these compounds the question arises as to their stability with regard to their disproportionation. In the case of the alkaline earths, zinc and cadmium, the disproportionation reaction is... 

The reported value for w x (1.6 cm" ) appears to be Inconsistent with the values obtained for other alkaline earth 1/2 -1 monohalides. By a comparison of g values, we estimate 3.36 cm and adopt this value. The reported... 

Angular distribution measurements of reactive scattering of alkaline earth atoms A by halogen molecules X2 have been reported80 for Ba + Cl2 and more extensively81-82 for Ba, Sr, Ca, Mg with Cl2, Br2, IC1, BrCN. The reactions form monohalide products AX, thus following primarily the reaction path... 

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