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For Z > Z < sub > cr </ sub >, if the innermost orbital ( 1s ) is not filled, the electric field of the nucleus will pull an electron out of the vacuum, resulting in the spontaneous emission of a positron ; however, this does not happen if the innermost orbital is filled, so that Z

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For Z > Z < sub > cr </ sub >, if the innermost orbital is not filled, the electric field of the nucleus will pull an electron out of the vacuum, resulting in the spontaneous emission of a positron.

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Promote Demote Fragment Fix

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