摘要:

The available data on the microwave spectrum of methanol are critically reviewed for information applicable to radio astronomy. Molecular data such as moments and product of inertia, torsional potential constants, centrifugal distortion and torsion‐rotation interaction constants, dipole moment, and structural parameters are tabulated. Observed rotational transitions are presented for the astronomically interesting isotopic forms of m

ISSN:0047-2689    

DOI:10.1063/1.3253116

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

The available data on the microwave spectrum of hydrogen sulfide are critically reviewed for information applicable to radio astronomy. Molecular data such as rotational constants, centrifugal distortion constants, hyperfine coupling parameters, and dipole moments are tabulated. A detailed centrifugal distortion calculation has been carried out for the most abundant isotopic form of this molecule,H232S, as well as for HD32S. Transitions have been predicted and tabulated for the frequency range 1 MHz to 1000 GHz forH232Sand 1 MHz to 700 GHz for HD32S. All predicted transitions include 95 percent confidence limits; estimated error limits have been reported for all measured transitions. Observed transitions ofH232SandH234Sare also listed.

ISSN:0047-2689    

DOI:10.1063/1.3253117

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

The compilations of fundamental vibrational frequencies of molecules previously published in the NSRDS‐NBS publication series and in this journal are here extended to 50 additional molecules. Selected values of the fundamental vibrational frequencies are given for each molecule, together with observed infrared and Raman spectral data and citations to the original literature. The selection of vibrational fundamentals has been based on careful studies of the spectral data and comprehensive normal‐coordinate analyses. An estimate of the accuracy of the selected values is included. The tables provide a convenient source of information for those who require vibrational energy levels and related properties in molecular spectroscopy, thermodynamics, analytical chemistry, and other fields of physics and chemistry.

ISSN:0047-2689    

DOI:10.1063/1.3253118

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

This compilation of all identified levels is based on the most accurate available observations. It includes 48 levels above the He II 12Slimit (two‐electron excitation).

ISSN:0047-2689    

DOI:10.1063/1.3253119

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

Photochemical and rate data have been evaluated for 28 gas phase reactions of interest for the chemistry of the stratosphere. The results are presented on data sheets, one per reaction. For each reaction, the available data are summarized. Where possible there is given a preferred value for the rate constant or, for the photochemical reactions, preferred values for primary quantum yields and optical absorption coefficients.

ISSN:0047-2689    

DOI:10.1063/1.3253120

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

This compilation contains values of the static dielectric constant of more than 300 inorganic solids. The temperature and frequency of the measurements are listed and the magnitude of the loss tangent is indicated if known. For ninety materials — including most ferroelectrics and antiferroelectrics and several oxides and halides — additional information is presented in the form of graphs depicting the temperature dependence of the dielectric constant. In a few cases the frequency and pressure dependences are also shown. The basic principles and formulas pertinent to the field of dielectrics are reviewed in a short introduction. This part also mentions several measuring techniques and indicates the criteria used for data selection.

ISSN:0047-2689    

DOI:10.1063/1.3253121

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

Theory and experimental practice in the field of soft x‐ray emission from metallic solids are briefly reviewed, and measurements on a number of systems (Al, Al in AuAl2, Al and Mg in Al‐Mg, Cu, Cu and Ni in Cu‐Ni, Li, Mg, Na, and Ni) are critically evaluated and compared with the results of other techniques and theory, with a view to establishing the pertinence of the soft x‐ray measurements and indicating specific guidelines for enhancing their value.

ISSN:0047-2689    

DOI:10.1063/1.3253122

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

The thermodynamic properties(Cpo, So, Ho−H0o, (Ho−H0o)/T,−(Go−H0o)/T, &Dgr;Hfo, &Dgr;Gfo and log Kf)for ethane and propane in the ideal gaseous state in the temperature range from 0 to 1500 K and at 1 atm were calculated by statistical thermodynamic methods based on a rigid‐rotor harmonic‐oscillator model. The internal rotation contributions to thermodynamic functions were evaluated by using a partition function formed by summation of internal rotation energy levels. The calculated heat capacities and entropies compare favorably with available experimental data.

ISSN:0047-2689    

DOI:10.1063/1.3253123

出版商:AIP    

年代:1973

数据来源: AIP