Mercury-213

Properties and data of the isotope ²¹³Hg.

Content

General data

Name of the isotope:Mercury-213; Hg-213Symbol:²¹³Hg or 21380HgMass number A:213 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:133Isotopic mass:213.00823(32) u (atomic weight of Mercury-213)Nuclide mass:212.9643484 u (calculated nuclear mass without electrons)Mass excess:7.6662 MeVMass defect:1.770206388 u (per nucleus)Nuclear binding energy:1648.93662918 MeV (per nucleus)
7.74148652 MeV (average binding energy per nucleon)Separation energy:S_N = 3.16(42) MeV (first neutron)Half-life:300 nsDecay constant λ:2310490.6018665 s^-1Specific activity α:6.532441248826 × 10⁺²⁷ Bq g^-1
1.765524661844 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)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^-	²¹³Tl	?	5.88(30) MeV
β^-, n	²¹²Tl	?	1.15(36) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 133) and isobaric (same nucleon number A = 213) with Mercury-213. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 133	Isobar A = 213
80	²¹³Hg	²¹³Hg
81	²¹⁴Tl	²¹³Tl
82	²¹⁵Pb	²¹³Pb
83	²¹⁶Bi	²¹³Bi
84	²¹⁷Po	²¹³Po
85	²¹⁸At	²¹³At
86	²¹⁹Rn	²¹³Rn
87	²²⁰Fr	²¹³Fr
88	²²¹Ra	²¹³Ra
89	²²²Ac	²¹³Ac
90	²²³Th	²¹³Th
91	²²⁴Pa	²¹³Pa
92	²²⁵U
93	²²⁶Np