Periodic Table/Cobalt/⁵⁵Co

← 54Co56Co →

⁵⁵Co

Cobalt-55

Radioactive· Half-life: 17.5 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

27

Neutrons (N)

28

Mass Number (A)

55

Atomic Mass

54.941996AMU

Spin / Parity

7/2-

Binding E/A

8.419keV

Natural Abundance

Trace / None

Half-life

17.5 h

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁺

100.0%

Decay Chain

⁵⁵CoCobalt17.5 h

β⁺100.0%

⁵⁵FeIron2.76 y

EC100.0%

⁵⁵MnManganeseSTABLE

3-step decay chain → stable · Primary path shown

Other Isotopes of Cobalt

47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78

← Back to CobaltData: IAEA NDS · ENSDF