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Gadolinium is a chemical element; it has symbol Gd and atomic number 64. Gadolinium is a silvery-white metal when oxidation is removed. It is a malleable and ductile rare-earth element. Gadolinium reacts with atmospheric oxygen or moisture slowly to form a black coating. Gadolinium below its Curie point of 20 °C (68 °F) is ferromagnetic, with ...
Isotopes of gadolinium (64Gd) Naturally occurring gadolinium (64 Gd) is composed of 6 stable isotopes, 154 Gd, 155 Gd, 156 Gd, 157 Gd, 158 Gd and 160 Gd, and 1 radioisotope, 152 Gd, with 158 Gd being the most abundant (24.84% natural abundance). The predicted double beta decay of 160 Gd has never been observed; only a lower limit on its half ...
Phebe Novakovic is an American businesswoman and former intelligence officer. She serves as the chairwoman and chief executive officer of General Dynamics. She was ranked 21st on Fortune's list of Most Powerful Women in 2023. [2] She was also listed as the world's 29th most powerful woman by Forbes. [3]
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Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof. GD&T is used to define the nominal (theoretically perfect ...
Gadolinium monosulfide. [Gd]. [S] Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Gadolinium monosulfide is a binary inorganic compound of gadolinium and sulfur with the chemical formula GdS. [ 1][ 2]
The General Dynamics F-16 Fighting Falcon is an American single-engine supersonic multirole fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF). Designed as an air superiority day fighter , it evolved into a successful all-weather multirole aircraft with over 4,600 built since 1976. [ 4 ]
Gadolinium oxysulfide is a promising luminescent host material, because of its high density (7.32 g/cm 3) and high effective atomic number of Gd. These characteristics lead to a high interaction probability for X-ray radiation. Several synthesis routes have been developed for processing Gd 2 O 2 S phosphors, including: solid state reaction ...