Isodiapher

Isodiaphere are nuclides with the same neutron excess. The chart of nuclides, a distinction

  • Isotopes (same number of protons with a variable number of neutrons )
  • Isotonic (constant neutron number in a variable number of protons ),
  • Isobaric (constant mass)
  • Isodiaphere ( nuclides with the same neutron excess )

The chart of nuclides in the representation most commonly used by Segre, that is increasingly upward increasingly being applied to the right, these four kinship Nuklidbeziehungen are on

  • Horizontal lines ( isotopes)
  • Vertical lines ( Isotonic )
  • Bisecting line with a negative slope ( isobars )
  • Bisecting line with a positive slope ( Isodiaphere )

While lighter stable nuclides (few nucleons in the nucleus ), respectively, a ratio of 1:1 (protons: neutrons) have a with increasing proton number increasing neutron excess requires the electrostatic repulsion of the protons in the nucleus ( bend of the valley of stability in the nuclear chart down or right at higher Nuklidmassen ). The neutron excess is therefore an important criterion of stability for nuclides (amongst other placed in the semi-empirical Weizsäcker formula to take into account terms, see " liquid-drop model of the atomic nucleus ").

  • Nuclear physics
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