Lead-213

Properties and data of the isotope ²¹³Pb.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

Lead-213 is a radioisotope of the chemical element lead, which has 131 neutrons in its atomic nucleus in addition to the element-specific 82 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 213. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of ²¹³Pb is exclusively for academic purposes and experimental research.

A report on the discovery of the isotope lead-213 was published in 1964. In the experiment described therein, 370 MeV protons from a cyclotron collided with a thorium template, initially producing radon-221 in a spallation reaction. The subsequent products were chemically separated and analyzed. Based on the analysis of the decay process and half-lives, one of the reaction products was identified as ²¹³Pb.

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

General data

Name of the isotope:Lead-213; Pb-213Symbol:²¹³Pb or 21382PbMass number A:213 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:131Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.5975609756098 (= neutron-proton ratio)Neutron excess (N-Z):49Isotopic mass:212.996561(7) u (atomic weight of Lead-213)Nuclide mass:212.9515826 u (calculated nuclear mass without electrons)Mass excess:-3.20341 MeVMass defect:1.78019562 u (per nucleus)Nuclear binding energy:1658.24153886 MeV (per nucleus)
7.78517154 MeV (average binding energy per nucleon)Separation energy:S_N = 3.726(7) MeV (first neutron)
S_P = 8.942(200) MeV (first proton)Half-life:10.2(3) minDecay constant λ:0.0011325934322875 s^-1Specific activity α:3.217281691638 × 10⁺¹⁸ Bq g^-1
86953559.233484 Ci g^-1Spin and parity:
(nuclear angular momentum)(9/2+)Year of discovery:1964

Radioactive Decay

Half-life T_½ = 10.2(3) min (minutes) respectively 6.12 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²¹³Bi	100 %	2.028(8) MeV

Parent Nuclides

Direct parent isotopes are: ²¹⁷Po, ²¹³Tl.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 131) and isobaric (same nucleon number A = 213) with Lead-213. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 131	Isobar A = 213
79	²¹⁰Au
80	²¹¹Hg	²¹³Hg
81	²¹²Tl	²¹³Tl
82	²¹³Pb	²¹³Pb
83	²¹⁴Bi	²¹³Bi
84	²¹⁵Po	²¹³Po
85	²¹⁶At	²¹³At
86	²¹⁷Rn	²¹³Rn
87	²¹⁸Fr	²¹³Fr
88	²¹⁹Ra	²¹³Ra
89	²²⁰Ac	²¹³Ac
90	²²¹Th	²¹³Th
91	²²²Pa	²¹³Pa
92	²²³U
93	²²⁴Np

External data and identifiers

Adopted Levels, Gammas:NuDat 213Pb

Literature and References

[1] - F. D. S. Butement, V. J. Robinson, S. M. Qaim:
A new isotope of lead: ²¹³Pb.
In: Journal of Inorganic and Nuclear Chemistry, 26, 4, (1964), DOI 10.1016/0022-1902(64)80279-7.