摘要:

Energy level data are given for the atom and all positive ions of magnesium (Z=12). These data have been critically compiled, mainly from published material on measurements and analyses of the optical spectra. We have derived or recalculated the levels for a number of the ions. In addition to the level value in cm−1and the parity, theJvalue and the configuration and term assignments are listed if known. Leading percentages from the calculated eigenvectors are tabulated wherever available. Ionization energies are given for all spectra.

ISSN:0047-2689    

DOI:10.1063/1.555617

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

The available data on the microwave spectrum of formic acid are critically reviewed for information applicable to radioastronomy. Molecular data such as the derived rotational constants, centrifugal distortion constants and electric dipole moment are tabulated. The observed rotational transitions are presented for the astronomically interesting isotopic forms. Calculated rotational transitions up to 300 GHz are presented for the ground vibrational state of H12C16O16OH, H12C16O16OD, D12C16O16OH and H13C16O16OH. Some observed transitions are also listed for H12C16O18OH and H12C18O16OH. Estimated error limits have been reported for all measured transitions.

ISSN:0047-2689    

DOI:10.1063/1.555618

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

Available data on the refractive index and its temperature derivative for alkaline earth halides were exhaustively surveyed, compiled, and analyzed. The most probable values of the refractive index at 293 K for the transparent region were generated for the materials for which experimental data were sufficiently abundant and reliable. Provisional values were also generated for the wavelength regions where available data were less abundant. Reasonable estimations of refractive index for the very scantily measured materials were made by incorporating the dielectric constants and wavelengths of absorption peaks into a simplified dispersion equation. It was found that of the twenty alkaline earth halides only seven, namely, MgF2, CaF2, SrF2, BaF2, CaCl2, SrCl2, and BaCl2, appear in the open literature with refractive index measurements. Most of the available data are for the first four of the seven materials. Temperature derivatives of refractive index for most of the alkaline earth halides were unavailable. As a result, data analysis ofdn/dTwas limited to CaF2, SrF2, and BaF2.

ISSN:0047-2689    

DOI:10.1063/1.555616

出版商:AIP    

年代:1980

数据来源: AIP