Second spectrum of tungsten (W II)

The Spectrum of Doubly Ionized Tungsten (W III)

The spectrum of doubly ionized tungsten (W III) was produced in a sliding-spark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600-2680 Å spectral region. The analysis has led to the establishment of 71 levels of the interacting 5d4, 5d3 6s and 5d2 6s2 even configurations and 164 levels of the interacting 5d3 6p and 5d2 6s 6p odd ones. A t...

Modules with Noetherian second spectrum

Let $R$ be a commutative ring and let $M$ be an $R$-module. In this article, we introduce the concept of the Zariski socles of submodules of $M$ and investigate their properties. Also we study modules with Noetherian second spectrum and obtain some related results.

The High Frequency Spectrum of Tungsten.

DEVELOPMENT OF A TUNGSTEN HEAVY ALLOY, W-Ni-Mn, USED AS KINETIC ENERGY PENETRATOR

Abstract: The objective of this research was to develop a tungsten heavy alloy (WHA) having a microstructure and properties good enough to penetrate hard rolled steels as deep as possible. In addition this alloy should not have environmental problems as depleted uranium (DU) materials. For this purpose a wide spread literature survey was performed and on the base of information obtained in ...

Tungsten ( W ) Self - Diffusion and Metal - Silicate Equilibration

Introduction: The extent to which the material that accreted to the proto-Earth and segregated to form the core chemically and isotopically equilibrated with the silicate mantle is an outstanding problem in planetary science. This question is particularly important when trying to assign a meaningful age for planetary accretion and core formation based on the Hf-W isotope systematics [1,2,3,4]. ...