Radiation levels were sufficiently high enough to be directly involved in thousands (estimates vary) of subsequent deaths as the radiation affected the human body in a variety of ways such as leukemia and a variety of cancers . John Hershey's book "No High Ground" chronicles these events .
See related links below .
During world war 2, the project existed to create the nuclear weapons dropped over Hiroshima and Nagasaki.
out of 80,000 people it is very impossible to answer your vague question, but i would say a person on the name of Michael Nowicki. He is a middle aged man who grew up in Nagasaki doing the impossible. Hope this Helps!
existed since the planet cooled
It doesn't appear to have ever existed outside of a book series. Histories and the memoirs of those involved in the Manhattan project are all pretty specific that there were only three bombs in existence during World War II, all of which are accounted for (the gadget was exploded in the Trinity test in New Mexico; Little Boy was dropped on Hiroshima; Fat Man was detonated over Nagasaki).
That's not something anybody invented; just about any object will emit infrared radiation, according to its temperature. In other words, infrared radiation existed long before there were any humans.
J. Robert Oppenheimer allowed for the fact that such a bomb existed as far back as May 10th, 1945. Remember that the Manhattan Project was undertaken using the utmost secrecy. The atomic bomb was first exploded at the top secret base of Alamogordo, NM on July 16th, 1945. The bomb was first used in warfare at Hiroshima and Nagasaki, Japan in August 1945. . Compliments of www.manuscriptex.com
No, nuclear radiation has existed sense the first stars in the early universe began fusing hydrogen. Nuclear power is an industry created by man only in the early 1950s.
Radiation has existed on Earth since its formation around 4.6 billion years ago. Natural sources of radiation, such as cosmic rays from space and radioactive elements in the Earth's crust, have been present since the planet's early days. Early life forms evolved mechanisms to cope with this background radiation.
Radiation has existed throughout the universe since the Big Bang, as it is a natural form of energy. This energy can take various forms, such as electromagnetic radiation (like light and radio waves) or particle radiation (like alpha and beta particles). Radiation is produced through processes like nuclear decay, fusion in stars, and cosmic events.
The first documented cases that became known by the public were in 1917 involving the Radium Girls: low paid women that painted a luminescent radium/zinc based paint on clock and instrument dials so they could be read at night.However cases among scientists go back to as early as 1897 when Marie Curie began her work separating radioactive elements from uranium ore.Note: early life about 3 billion years ago was sometimes exposed to high levels of radiation when naturally occurring uranium fission reactors spontaneously formed in some locations that could have also caused radiation poisoning. However the concentration of uranium-235 in natural uranium soon dropped too low for such reactors to form after that.
That's impossible to answer considering nobody even knows if a volcanic explosion ever occured. That's just a theory, so you can't really know without guessing.
4n would fit your criteria if it existed, but it doesn't. A helium atom would work to, but they aren't a form of radiation. So, unless I'm forgetting something, I don't believe there's an answer to your question.