Mercury-171

Properties and data of the isotope ¹⁷¹Hg.

Contents

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

General data

Name of the isotope:Mercury-171; Hg-171Symbol:¹⁷¹Hg or 17180HgMass number A:171 (= number of nucleons)Atomic number Z:80 (= number of protons)Neutrons N:91Isotopic mass:171.00374(32) u (atomic weight of Mercury-171)Nuclide mass:170.9598584 u (calculated nuclear mass without electrons)Mass excess:3.48379 MeVMass defect:1.410769916 u (per nucleus)Nuclear binding energy:1314.12371213 MeV (per nucleus)
7.68493399 MeV (average binding energy per nucleon)Separation energy:
S_P = 60(36) MeV (first proton)Half-life:59 μsDecay constant λ:11748.257297626 s^-1Specific activity α:4.137407035385 × 10⁺²⁵ Bq g^-1
1.118218117671 × 10⁺¹⁵ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2004

Radioactive Decay

Half-life T_½ = 59 μs respectively 5.9 × 10^-5 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁶⁷Pt	ca. 100 %	7.668(15) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 91) and isobaric (same nucleon number A = 171) with Mercury-171. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 91	Isobar A = 171
52	¹⁴³Te
53	¹⁴⁴I
54	¹⁴⁵Xe
55	¹⁴⁶Cs
56	¹⁴⁷Ba
57	¹⁴⁸La
58	¹⁴⁹Ce
59	¹⁵⁰Pr
60	¹⁵¹Nd
61	¹⁵²Pm
62	¹⁵³Sm
63	¹⁵⁴Eu
64	¹⁵⁵Gd
65	¹⁵⁶Tb	¹⁷¹Tb
66	¹⁵⁷Dy	¹⁷¹Dy
67	¹⁵⁸Ho	¹⁷¹Ho
68	¹⁵⁹Er	¹⁷¹Er
69	¹⁶⁰Tm	¹⁷¹Tm
70	¹⁶¹Yb	¹⁷¹Yb
71	¹⁶²Lu	¹⁷¹Lu
72	¹⁶³Hf	¹⁷¹Hf
73	¹⁶⁴Ta	¹⁷¹Ta
74	¹⁶⁵W	¹⁷¹W
75	¹⁶⁶Re	¹⁷¹Re
76	¹⁶⁷Os	¹⁷¹Os
77	¹⁶⁸Ir	¹⁷¹Ir
78	¹⁶⁹Pt	¹⁷¹Pt
79	¹⁷⁰Au	¹⁷¹Au
80	¹⁷¹Hg	¹⁷¹Hg