摘要:

Oscillator strengths for the lithium isoelectronic sequence have been critically evaluated and complied by means of a new generalized analysis which makes use of several types of systematic trends and fundamental spectroscopic constraints. Relativistic effects have also been considered. The data are presented in separate tables for each ion of the sequence from Liithrough Nixxvi, and are arranged within each table according to spectral series. Separate tables are presented for the 2s–2pand 2s–3ptransitions, with both relativistic and nonrelativisticf‐values listed for all ions of the sequence through Nixxvi, as well as for a few selected ions of higher nuclear charge. The general tables contain transitions of the typesms−np,mp−ns, andmp−nd, with 2?m?4 (mis the lower principal quantum number) and 3?n?7. Since most recommended data were determined from a nonrelativistic analysis, hydrogenic relativistic considerations were applied to estimate when the data would be significantly altered by the inclusion of relativistic effects, and suchf‐values were excluded from the tabulation.

ISSN:0047-2689    

DOI:10.1063/1.555538

出版商:AIP    

年代:1976

数据来源: AIP

摘要:

Spectroscopic and thermal data were reviewed. The selected values for the principal moments of inertia, the vibrational fundamentals, and the standard enthalpy of formation at 298.15 K for each of the six chlorofluoromethanes were used to derive the chemical thermodynamic properties of molecules from 0 to 1500 K, based on the rigid‐rotor harmonic‐oscillator approximation. The calculated values are in accord with experimental heat capacities and entropies.

ISSN:0047-2689    

DOI:10.1063/1.555539

出版商:AIP    

年代:1976

数据来源: AIP

摘要:

This publication includes all data on superconductive materials intercepted through March 1975. Data on the bulk elements have been critically evaluated, and values on alloys, compounds, and other forms have been selected and condensed to indicate the probable value and spread of values observed. Proven non‐superconductors have been noted. Conflict in data values has been noted. All data have been keyed to the literature in one or more of the tables. Special subdivisions are presented for superconductive materials with organic constituents and for those based on semiconductive materials. The properties presented are superconductive critical temperature, critical magnetic fields, material state and composition including crystal‐structure type where noted, a key to thin‐film forms, and the presence of thermodynamic data (generally the electronic specific heat, &ggr;, and Debye &Vthgr;). High‐magnetic‐field superconductors are noted with listing ofHc1,Hc,Hc2, andHc3plus the temperature of observationTobs.

ISSN:0047-2689    

DOI:10.1063/1.555540

出版商:AIP    

年代:1976

数据来源: AIP