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In nuclear physics and nuclear chemistry, a nuclear reaction is a process in which two nuclei, or a nucleus and an external subatomic particle, collide to produce one or more new nuclides. Thus, a nuclear reaction must cause a transformation of at least one nuclide to another.
Photofission is a process in which a nucleus, after absorbing a gamma ray, undergoes nuclear fission and splits into two or more fragments.. The reaction was discovered in 1940 by a small team of engineers and scientists operating the Westinghouse Atom Smasher at the company's Research Laboratories in Forest Hills, Pennsylvania. [1]
The energy of these rays is sometimes sufficient to start photonuclear reactions resulting in emitted neutrons. One such reaction, 14 7 N (γ,n) 13 7 N, is the only natural process other than those induced by cosmic rays in which 13 7 N is produced on Earth. The unstable isotopes remaining from the reaction may subsequently emit positrons by β ...
On August 6, 1945, the US dropped an atomic bomb on Hiroshima -- and newly revealed photos shed light on the preparations for the attack. On August 6, 1945, the US dropped an atomic bomb on ...
Inside the radiative fireball, the bomb itself is rapidly expanding due to the heat generated by the nuclear reactions. This moves outward at supersonic speeds, creating a hydrodynamic shock wave at its outer edge. After a brief period, this shock front reaches and then passes the initial radiative fireball.
Nuclear fusion is what powers our sun and thermonuclear weapons. It occurs when atomic nuclei merge, or fuse, together, producing a great deal of energy. If we could harness fusion power, it would ...
These isotopes are the result of nuclear fission-reaction of uranium. Because the short half-lives of these gases: (Xe-133: 5 days Xe-135: 9 hours), the presence could only mean that nuclear fissions were occurring at some places in the reactor. Boric-acid was poured into the reactor in an attempt to stop the fission-reactions.
It is the reaction which occurs when a neutron enters a nucleus and a proton leaves the nucleus simultaneously. [1] For example, sulfur-32 (32 S) undergoes an (n,p) nuclear reaction when bombarded with neutrons, thus forming phosphorus-32 (32 P). The nuclide nitrogen-14 (14 N) can also undergo an (n,p) nuclear reaction to produce carbon-14 (14 C).