THE FIRST ISOLATION OF AMERICIUM IN THE FORM OF PURE COMPOUNDS - THE SPECIFIC ALPHA-ACTIVITY AND HALF-LIFE OF Am241

The microgram scale isolation and preparation of pure compounds of americium is described. Data are presented to show that the alpha-half-life of the isotope Am{sup 241} is 490 {+-} 14 years. The absorption spectrum of Am(III) in 1M nitric acid in the range 3500-8000 mu is given. The wave lengths of 10 of the most prominent lines in the copper spark emission spectrum of americium are given to the nearest 0.01 {angstrom}. Evidence is presented to show that the potential for the Am(III)-Am(IV) couple in acid solution is more negative than -2v and that the potential for the Am(II)-Am(III) couple is more positive than +0.9v

Thermodynamic systematics of oxides of americium, curium, and neighboring elements

Recently-obtained calorimetric data on the sesquioxides and dioxides of americium and curium are summarized. These data are combined with other properties of the actinide elements to elucidate the stability relationships among these oxides and to predict the behavior of neighboring actinide oxides. 45 references, 4 figures, 5 tables

Integrated document management for decision support

The effective management of documents is an integral requirement for operational and administrative decision support within organizations, irrespective of their size, industry sector, products and services. Documents are a fundamental part of decision-making in commercial and government enterprises as well as small to medium businesses. The document paradigm in many organizations is one of ineffective management, which may contribute to inadequate performance and quality in the decision making process. The implementation of effective document management solutions is typically more challenging in larger organizational structures, particularly where office and service locations are distributed, potentially across the globe. This chapter reviews the requirements for managing documents in organizations, the core capabilities of document management systems and how interfaces with other organizational systems can be applied to enhance these core capabilities. The chapter advocates an integrative approach to planning effective document management system implementations that are aligned with business planning and process improvement endeavors. Effective document management systems facilitate decision support during strategic, tactical and operational planning activities and also provide organizations with a managed documentary foundation for exploiting organizational knowledge

THE FIRST ISOLATION OF AMERICIUM IN THE FORM OF PURE COMPOUNDS - THE SPECIFIC ALPHA-ACTIVITY AND HALF-LIFE OF Am241

The microgram scale isolation and preparation of pure compounds of americium is described. Data are presented to show that the alpha-half-life of the isotope Am{sup 241} is 490 {+-} 14 years. The absorption spectrum of Am(III) in 1M nitric acid in the range 3500-8000 mu is given. The wave lengths of 10 of the most prominent lines in the copper spark emission spectrum of americium are given to the nearest 0.01 {angstrom}. Evidence is presented to show that the potential for the Am(III)-Am(IV) couple in acid solution is more negative than -2v and that the potential for the Am(II)-Am(III) couple is more positive than +0.9v

COMPOUNDS OF DIVALENT-LANTHANIDES. PREPARATION, OPTICAL PROPERTIES, AND CRYSTAL STRUCTURE

Preparation of the sulfates, carbonates, and fluorides of divalent samarium, europium, and ytterbium is described. Crystallographic data from both x-ray and optical examination of the compounds are presented. Due to the instability of these plus (II) salts, the precision of the measurement is affected, but sufficient for characterization. A simple and convenient electrolytic method was devised to prepare the divalent sulfates. By metathetical reactions, carbonates and fluorides were prepared. The compounds were analyzed by a pyrohydrolytic method. (H.G.G.