Thread: Masonic movies
View Single Post
Old 27-11-2013, 11:22 PM   #447
Senior Member
Join Date: Apr 2008
Location: Inactive
Posts: 36,483
Likes: 237 (190 Posts)
Lightbulb Demon Core

The demon core was a 6.2-kilogram (14 lb; 1 st), 3.5-inch-diameter (89 mm) subcritical mass of plutonium which went briefly critical in two separate accidents at the Los Alamos laboratory in 1945 and 1946. Each incident resulted in the acute radiation poisoning and subsequent death of a scientist. After these incidents the spherical plutonium pit was referred to as the "demon core"..The demon core was put to use for the Able detonation test of the Crossroads series at Bikini Atoll on July 1, 1946.. Its yield was 23 kilotons of TNT (96 TJ), the same as the next core used in the Crossroads pair of bomb tests...

On August 21, 1945, the plutonium core produced a burst of neutron radiation that led to Harry Daghlian's death. Daghlian, a physicist, made a mistake while working alone performing neutron reflection experiments on the core. The core was placed within a stack of neutron-reflective tungsten carbide bricks and the addition of each brick moved the assembly closer to criticality. While attempting to stack another brick around the assembly, Daghlian accidentally dropped it onto the core and thereby caused the core to go critical, a self-sustaining chain reaction. Despite quick action in moving the brick off the assembly, Daghlian received a fatal dose of radiation. He died 25 days later from acute radiation poisoning...

On May 21, 1946, physicist Louis Slotin and 7 other Los Alamos personnel were in a Los Alamos laboratory conducting an experiment to verify the exact point at which a subcritical mass (core) of fissile material could be made critical by the positioning of neutron reflectors. The test was known as "Tickling the Dragon's Tail" for its extreme risk..Another person who was in the lab at the time of the accident—Private Robert J. Hemmerly, a Special Engineer Detachment (SED) guard—received an exposure of approximately 31 roentgens (0.31 Gy) of soft X-rays (80 kV equivalent) and less than 1 roentgen (0.01 Gy) of gamma rays. Hemmerly died in 1978 (33 years after the accident) from acute myelogenous leukemia at the age of 62... Knox..Here's something from the Delta, tell me this isn't Son House..We're bluesmen.. little soul's from the golden ghetto.. All I need is a Mississippi and I'm ready to roll!...

Last edited by lightgiver; 27-11-2013 at 11:23 PM.
lightgiver is offline   Reply With Quote