Beta-delayed proton emission Nagy Sándor honlapjára Nagy Sándor: Nukleáris Címszavak Glosszáriumába, melyhez ez a lap is tartozik A Tékába, mely ehhez hasonló animációkhoz/szimulációkhoz vezet Nagy Sándor webhelyén

See also ugrás saját lapra (Flash-sel) beta-delayed alpha decay (alpha emission) & ugrás saját lapra (Flash-sel) beta-delayed neutron decay (neutron emission).
Click for full-screen animation: nagyító || Az oldal magyar változatához hungarian

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The animation presents an example of beta-delayed particle emission. In this particular case the decay process consists of the following steps:

β+ decay:

2615P112614Si12 + e+ + ν,

followed by proton emission (proton decay):

2614Si122513Al12 + p.

Details of the chart of nuclides NNDC Chart of Nuclides in the vicinity of 26P

In the rollover image of the picture below rollover kép you can see the decay processes starting from 26P. After the first β+ decay we get 100% 26S. Then the main branch is β+ decay again (denoted by ε in the chart). However thare is also a thin branch (~1%) where the 26S nucleus gets rid of its high excitation energy by emitting a proton rather than a γ photon. The product of this decay is 26Si which does not normally decay by proton emission although it is still relatively rich in protons (otherwise it would not show β+ activity after all). This shows that the excited state of the nucleus is important for the proton to conquer the Coulomb barrier.

Proton decay – in the sense of spontaneous proton emission by a ground-state nucleus – only occurs near the proton dripline on the table of nuclides.

Nuklidtérkép a P-26 körül

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