Mercury-207

Properties and data of the isotope ²⁰⁷Hg.

Contents

General Data

Radioactive Decay

Isotones und Isobares

Literature

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

General data

Name of the isotope:Mercury-207; Hg-207Symbol:²⁰⁷Hg or 20780HgMass number A:207 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:127Isotopic mass:206.98230(3) u (atomic weight of Mercury-207)Nuclide mass:206.9384184 u (calculated nuclear mass without electrons)Mass excess:-16.48744 MeVMass defect:1.744146892 u (per nucleus)Nuclear binding energy:1624.66236502 MeV (per nucleus)
7.84861046 MeV (average binding energy per nucleon)Separation energy:S_N = 3.61(4) MeV (first neutron)
S_P = 9.56(30) MeV (first proton)Half-life:2.9(2) minDecay constant λ:0.0039836044859767 s^-1Specific activity α:1.164554725477 × 10⁺¹⁹ Bq g^-1
314744520.39922 Ci g^-1Spin and parity:
(nuclear angular momentum)(9/2+)Year of discovery:1982

Radioactive Decay

Half-life T_½ = 2.9(2) min (minutes) respectively 1.74 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	²⁰⁷Tl	100 %	4.55(3) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 127) and isobaric (same nucleon number A = 207) with Mercury-207. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 127	Isobar A = 207
76	²⁰³Os
77	²⁰⁴Ir
78	²⁰⁵Pt	²⁰⁷Pt
79	²⁰⁶Au	²⁰⁷Au
80	²⁰⁷Hg	²⁰⁷Hg
81	²⁰⁸Tl	²⁰⁷Tl
82	²⁰⁹Pb	²⁰⁷Pb
83	²¹⁰Bi	²⁰⁷Bi
84	²¹¹Po	²⁰⁷Po
85	²¹²At	²⁰⁷At
86	²¹³Rn	²⁰⁷Rn
87	²¹⁴Fr	²⁰⁷Fr
88	²¹⁵Ra	²⁰⁷Ra
89	²¹⁶Ac	²⁰⁷Ac
90	²¹⁷Th	²⁰⁷Th
91	²¹⁸Pa
92	²¹⁹U