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Title: Vapor pressure and thermodynamics of actinide metals

Precise vapor pressure measurements by target collection/mass spectrometric Knudsen effusion techniques were combined with crystal entropy estimates to produce self-consistent free-enrgy functions, permitting calculation of heats, entropies and free energies from 298/sup 0/K to the highest temperatures of measurement. The vapor pressures and thermodyamics of vaporization of americium, curium, berkelium, and californium are compared in terms of electronic structure and bonding trends in the trans-plutonium elements. These resuslts are contrasted with the behavior of the early actinides, with attention to energy states and possible effects of f-electron bonding. 9 figures, 4 tables.
Authors:
 [1] ; ; ;
  1. (Los Alamos Scientific Lab., NM)
Publication Date:
OSTI Identifier:
6205013
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Symp. Ser.; (United States); Journal Volume: 131
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; AMERICIUM; THERMODYNAMIC PROPERTIES; VAPOR PRESSURE; BERKELIUM; CALIFORNIUM; CURIUM; ACTINIDES; ENTROPY; FREE ENERGY; KNUDSEN FLOW; MASS SPECTROSCOPY; MEDIUM TEMPERATURE; ELEMENTS; ENERGY; FLUID FLOW; GAS FLOW; METALS; PHYSICAL PROPERTIES; SPECTROSCOPY; TRANSPLUTONIUM ELEMENTS; TRANSURANIUM ELEMENTS 400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials