Chest radiograph. A chest radiograph, colloquially called a chest X-ray (CXR), or chest film, is a projection radiograph of the chest used to diagnose conditions affecting the chest, its contents, and nearby structures. Chest radiographs are the most common film taken in medicine.
Helium atom is created by two Hydrogenâs atoms which are the smallest, basic, stabile, unclosed quantum, wave-particle formation.Hydrogen atom by. different relationships create all stabile formations and. Helium atom { a particle of nucleus} is the most stabile formation.Atoms structures are bond by energetic part {semi-loop}. strong forces of quantum and are very strong bonds but molecules relationships {covalence} are bond by gravity{semi-loop} - weak forces and are bond by electrons.y United Nature Theory. Helium atom is created by two Hydrogenâs atoms which are the smallest, basic, stabile, unclosed quantum, wave-particle formation. Hydrogen atom by. different relationships create all stabile formations and. Helium atom { a particle of nucleus} is the most stabile formation.
The Hamiltonian of helium, considered as a three-body system of two electrons and a nucleus and after separating out the centre-of-mass motion, can be written as. where is the reduced mass of an electron with respect to the nucleus, and are the electron-nucleus distance vectors and.The nuclear charge, is 2 for helium. In the approximation of an infinitely heavy nucleus, we have and the mass polarization term disappears.here is the reduced mass of an electron with respect to the nucleus, and are the electron-nucleus distance vectors and. The nuclear charge, is 2 for helium. In the approximation of an infinitely heavy nucleus, we have and the mass polarization term disappears.