^Energy bands in solids
^Energy bands in solids Energy levels of electrons in an isolated atom are well defined & discrete, however the valence […]
Entries by kp-web-admin
^Semiconductors
^Semiconductors Semiconductors (e.g. Si, Ge) belong to 14th group, thus have 4 valence electrons & hence from covalent bonds (temperature […]
^Absorption radiations
^Absorption radiations Radiations are absorbed by the materials according to the relation: I = I0 e-μ X Here μ = […]
^Commonly used abbreviations
^Commonly used abbreviations 1. R: Roentgen 2. Rad: Radiation absorbed dose 3. rem: Roentgen equivalent in man 4. RBE: Relative […]
^Fission versus fusion
^Fission versus fusion
^Moderator
^Moderator The neutrons produced in fission of 235U nuclei have average KE about 2 MeV. Such neutrons are called fast […]
^Critical mass
^Critical mass The minimum of Uranium needed to sustain chain reaction is called critical mass. It is 10 kg.
^Nuclear fuel
^Nuclear fuel Fissionable material is called nuclear fuel. The isotopes like U-235, Th -232 and Pu 239 can be used […]
^Uranium enrichment
^Uranium enrichment The 0.69% U235 is not sufficient to produce a self-sustaining critical chain reaction. To ensure high probability of […]
^Natural Uranium
^Natural Uranium Found as uranium oxide (U2 O3) which when purified has a rich yellow color and is called “yellowcake”. […]
