The estimation of maximum energy of spectrum

2. to determine the maximum energy which the researched irradiate electrons may have .
• The device of recording of pulses;
• The holes of lead and aluminum;
• The complex of aluminum plates of 0.1 mm thickness.
The theory
β fission
The radioactivity is called the self changing of unstable atomic nuclear in which the light nuclear are irradiated (for example, a particles) or subatomic particles (electrons, positrons, neutrons, protons gamma quantum).
M. Curie was the first scientist researched the composition of radioactive materials irradiated rays. She examined their deviation in the magnetic field. There was researched that  rays are the fast electrons. Their velocity much times greater of simple cathode (electron) rays velocity. The energy of.  particles may be till some MeV, the velocity is near to the light velocity in vacuum. This radioactive nuclear conversions  or electron fission
During the natural radioactive fission the number of nucleons in the nuclear does not change because after electron flying the number of mass A remain the same
Studding the radioactive  fission it was necessary to answer the three questions
1) The nuclear are composed from protons and neutrons. From where the electrons are flying during the  fission?
- particles energy spectrum is continuous. The energy spectrum curve begins from zero and is limited from great energy side. Why  active nuclear may irradiate the various energy particles?
3) The electron has the spin. h/2. After flying electron the spin of nuclear would be changed in h/2.
These problems were resolved in 1931 by W.Pauli. He understood that during  fission without electron the another particle was flying and had zero charge, very little mass and spin h/2. After that Fermi called this particle neutrino and finished the  fission theory. The neutrino is written . Now is researched that the particle flying during the  fission is...

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