Polonium-224

Properties and data of the isotope ²²⁴Po.

Content

General data

Name of the isotope:Polonium-224; Po-224Symbol:²²⁴Po or 22484PoMass number A:224 (= number of nucleons)Atomic number Z:84 (= number of protons)Neutrons N:140Isotopic mass:224.03211(21) u (atomic weight of Polonium-224)Nuclide mass:223.9860347 u (calculated nuclear mass without electrons)Mass excess:29.91027 MeVMass defect:1.838280928 u (per nucleus)Nuclear binding energy:1712.34765475 MeV (per nucleus)
7.64440917 MeV (average binding energy per nucleon)Separation energy:S_N = 5.24(28) MeV (first neutron)
S_P = 9.51(45) MeV (first proton)Half-life:300 nsDecay constant λ:2310490.6018665 s^-1Specific activity α:6.211651723214 × 10⁺²⁷ Bq g^-1
1.678824790057 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2010

Radioactive Decay

Half-life T_½ = 300 ns respectively 3.0 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²²⁴At	?	2.2(2) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 140) and isobaric (same nucleon number A = 224) with Polonium-224. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 140	Isobar A = 224
83	²²³Bi	²²⁴Bi
84	²²⁴Po	²²⁴Po
85	²²⁵At	²²⁴At
86	²²⁶Rn	²²⁴Rn
87	²²⁷Fr	²²⁴Fr
88	²²⁸Ra	²²⁴Ra
89	²²⁹Ac	²²⁴Ac
90	²³⁰Th	²²⁴Th
91	²³¹Pa	²²⁴Pa
92	²³²U	²²⁴U
93	²³³Np
94	²³⁴Pu
95	²³⁵Am
96	²³⁶Cm
97	²³⁷Bk
98	²³⁸Cf