摘要:

Tables of differential and total elastic scattering cross sections for 92 elements in the atomic number range13⩽Z⩽104and for selected photon energies in the range 50–1500 keV have been presented. The energies are chosen to cover the most commonly used photon energies and in a suitable grid so as to enable one to use the usual interpolation methods to determine cross sections for any other energies in this energy range. The available experimental results are also compared with the tabulated values and the difference is presented graphically. ©1998 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.556027

出版商:AIP    

年代:1998

数据来源: AIP

摘要:

The equilibrium and transport properties of liquid4Heare deduced from experimental observations at the saturated vapor pressure. In each case, the bibliography lists all known measurements. Quantities reported here include density, thermal expansion coefficient, dielectric constant, superfluid and normal fluid densities, first, second, third, and fourth sound velocities, specific heat, enthalpy, entropy, surface tension, ion mobilities, mutual friction, viscosity and kinematic viscosity, dispersion curve, structure factor, thermal conductivity, latent heat, saturated vapor pressure, thermal diffusivity and Prandtl number of helium I, and displacement length and vortex core parameter in helium II. ©1998 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.556028

出版商:AIP    

年代:1998

数据来源: AIP

摘要:

The Commission’s Subcommittee for the Isotopic Composition of the Elements has carried out its biennial review of isotopic compositions, as determined by mass spectrometry and other relevant methods. This involves a critical evaluation of the published literature, element by element, and forms the basis of the Table of Isotopic Compositions of the Elements as Determined by Mass Spectrometry presented here. New guidelines have been used to arrive at the uncertainties on the isotopic abundances and there are numerous changes to the table since it was last published in 1991. Atomic Weights calculated from this table are consistent withAr(E)values listed in the Table of Standard Atomic Weights 1997. ©1998 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.556031

出版商:AIP    

年代:1998

数据来源: AIP

摘要:

The solubility of ammonium phosphate is reviewed. Many ammonium phosphates can be described in terms of the ternary system:NH3–PO5–H2O. However, this system differs from systems like the sulfates and halates in that it has a marked tendency to form condensed oligophosphate ions. The literature survey covers the period up to 1988. ©1998 American Institute of Physics and American Chemical Society.

ISSN:0047-2689    

DOI:10.1063/1.556030

出版商:AIP    

年代:1998

数据来源: AIP