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The True Story of World War II's Third Un-used Atomic Bomb and How it Killed Two Scientists

On the 6th day of August, 1945, a bomb was detonated and it wasn't just another bomb, it was one that the world has never seen, as at that time. The Uranium-235 core bomb dubbed "Little Boy" was detonated 600 meters in the sky above Hiroshima, Japan. Everything within 2 kilometers of the blast was vaporized, obliterating at least 92 percent of the city's structures and killing about 140,000 people, as the Hiroshima peace Memorial museum recounts.

Just three days after, another was detinoted, the Plutonium-239 core of "Fat Man" was detonated 500 meters in the sky above Negasaki. However, the damage done to Hiroshima wasn't really done to Nagasaki as a nearby mountain ridge contained the blast to the city's Urakami district. Even at that, 36 percent of the city was still consumed by the bomb, and about 74,000 people were killed.

Within that period from August 6th to August 10th, the world experienced a terrifying fear of bombs, and their fallout, effectively brought an end to World War II with Japan's surrender on August 15. Perhaps one would have thought that the event from these terryfing days would have taught those invokved and subsequent generations, to let go of atomic weaponry. Though it seems humanity has taken it easy with atomic bombs, we'll when it comes to using it. At least, we haven't experienced a nuclear holocaust, and the Cold war deterrence policy was a kind of Terrible success.

In all of these, what strikes out is the fact that the United States, after the events in Hiroshima and Negasaki, didn't subscribe to dropping their third bomb. However, that same bomb which is dubbed "Demons core" soon had its revenge on the scientists who toyed with it. Keep reading to find out how.


In a note or perhaps letter sent by General Leslie R. Groves to General George C. Marshall on August 10, he wrote, "The bomb should be ready for delivery on the first suitable weather after 17 or 18 August," then the "Demons core," a 14 pound plutonium-239 bomb made its way to Los Alamos National Laboratory in New Mexico, under the study and purview of physicists Harry Dahglian and his partner, Lois Slotin.

Before this period, atomic bombs were only designed to as some sort of "artisanal products", they simply didn't go off automatically. Rather, there are lots of processes that go into the explosion. These bombs were designed according to "hair trigger" "-5 cents" configuration, per The Atlantic. Five percent more plutonium, and flash: the core went "supercritical." Neutrons in the core of the bomb begin to hit one another, and more neutrons hit more neutrons, and the exponentially growing cascade in the core, yields a tremendous radioactive and thermal energy.

However, Dahglian and Slotin decided to find a more unconventional way to reach the supercritical point of the bomb's reaction, which takes place in the core. They tried this by using thick materials such as beryllium, which made the neutron bounce off and back into the core and this wouldn't cause an explosion, but it will tell them how to build the best bomb for the least material.

The research gets Messy!

On August 21, 1945, Dahglian who thought he had gotten the hang of the bomb, was trying to build a barrier around the core using tungsten-carbide bricks. While doing so, he dropped one of the brick by accident, and the core reached a supercritical point. From the explanation above, we know that the bomb reaching a supercritical point comes before the 'big blast'. However, this time, there was no big blast, just a bright blue flash, a rush of heat, and 25 days later, Dahglian was dead.

How did this happen?

When enquiry was made into his death, it was discovered that the very DNA inside Harry Dahglian cells had been shredded by gamma particles. Though his headstone reads that he died in service to his country, we know that his experiment and a quick accident was responsible for his death.

Interesting, Lois who sat with Dahglian as he took his last breath, didn't stop the experiment, he simply continued. Infact, he took even more unnecessary risk while doing it "Shirt unbuttoned and sunglasses on" as The Atlantic describes, Slotin went far with it and slid beryllium half-sphere on the top of the demon core, though he did it slowly, he also ignored the fact that he had no. Failsafe spacer, while doing it with his bare hands and the edge of a flathead screwdriver to keep it from being sealed..

Unfortunately, on the final day of Testing, Slotin mistakenly dropped the screwdriver and the beryllium cap slid into ace. The same blue flash then appeared amd the same rush of heat, and within a few seconds, he said "well, that does it," knowing he wouldn't survive, and ordered the other scientists to record where they were standing. Nine days later, Slotin was dead.

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Hiroshima Japan Little Boy Uranium-235


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