Potassium-40

Isotope

Isotope of:

Mass number:

  • 40

Mass:

Mass Uncertainty
  • 39.964 u (6.6362E-17 µg )
  • 0 u (3.5E-25 µg )

Natural abundance (Earth):

  • 0.0117 %

Half-life:

  • 1,277,000,000 s (21283333.33 min )

Magnetic moment:

  • -1.2981 μN

Decay modes:

Decay mode Percentage Decay energy
  • 10.67 %
  • 89.33 %
  • 1.32 MeV (1320000 eV )
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