Radon-223

Properties and data of the isotope ²²³Rn.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Radon isotopes (and general data sources).

General data

Name of the isotope:Radon-223; Rn-223Symbol:²²³Rn or 22386RnMass number A:223 (= number of nucleons)Atomic number Z:86 (= number of protons)Neutrons N:137Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.593023255814 (= neutron-proton ratio)Neutron excess (N-Z):51Isotopic mass:223.021889(8) u (atomic weight of Radon-223)Nuclide mass:222.9747168 u (calculated nuclear mass without electrons)Mass excess:20.38947 MeVMass defect:1.838157244 u (per nucleus)Nuclear binding energy:1712.23244384 MeV (per nucleus)
7.67817239 MeV (average binding energy per nucleon)Separation energy:S_N = 4.054(8) MeV (first neutron)
S_P = 7.852(18) MeV (first proton)Half-life:24.3(4) minDecay constant λ:0.00047540958886142 s^-1Specific activity α:1.283849107752 × 10⁺¹⁸ Bq g^-1
34698624.533851 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2Magnetic dipole moment:μ(μ_N) = - 0.776(8)Quadrupole moment Q:0.80 barn (100 fm²)Nuclear g-factor:g_l = -0.22171428571429Year of discovery:1964

Radioactive Decay

Half-life T_½ = 24.3(4) min (minutes) respectively 1.458 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²²³Fr	100 %	2.007(8) MeV

Parent Nuclides

Direct parent isotope is: ²²⁵Ra.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 137) and isobaric (same nucleon number A = 223) with Radon-223. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 137	Isobar A = 223
82	²¹⁹Pb
83	²²⁰Bi	²²³Bi
84	²²¹Po	²²³Po
85	²²²At	²²³At
86	²²³Rn	²²³Rn
87	²²⁴Fr	²²³Fr
88	²²⁵Ra	²²³Ra
89	²²⁶Ac	²²³Ac
90	²²⁷Th	²²³Th
91	²²⁸Pa	²²³Pa
92	²²⁹U	²²³U
93	²³⁰Np	²²³Np
94	²³¹Pu
95	²³²Am	²²³Am
96	²³³Cm
97	²³⁴Bk