Thallium-176

Properties and data of the isotope ¹⁷⁶Tl.

Contents

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

General data

Name of the isotope:Thallium-176; Tl-176Symbol:¹⁷⁶Tl or 17681TlMass number A:176 (= number of nucleons)Atomic number Z:81 (= number of protons)Neutrons N:95Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.1728395061728 (= neutron-proton ratio)Neutron excess (N-Z):14Isotopic mass:176.00062(8) u (atomic weight of Thallium-176)Nuclide mass:175.95619 u (calculated nuclear mass without electrons)Mass excess:0.57753 MeVMass defect:1.456374612 u (per nucleus)Nuclear binding energy:1356.60421283 MeV (per nucleus)
7.70797848 MeV (average binding energy per nucleon)Half-life:ca. 5.2 msDecay constant λ:13.329753472307 s^-1Specific activity α:4.561003013548 × 10⁺²² Bq g^-1
1232703517175.4 Ci g^-1Spin and parity:
(nuclear angular momentum)(3-.4-.5-)Year of discovery:2004

Radioactive Decay

Half-life T_½ = ca. 5.2 ms respectively 5.2 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	¹⁷⁵Hg	~100 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 95) and isobaric (same nucleon number A = 176) with Thallium-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 95	Isobar A = 176
55	¹⁵⁰Cs
56	¹⁵¹Ba
57	¹⁵²La
58	¹⁵³Ce
59	¹⁵⁴Pr
60	¹⁵⁵Nd
61	¹⁵⁶Pm
62	¹⁵⁷Sm
63	¹⁵⁸Eu
64	¹⁵⁹Gd
65	¹⁶⁰Tb
66	¹⁶¹Dy
67	¹⁶²Ho
68	¹⁶³Er	¹⁷⁶Er
69	¹⁶⁴Tm	¹⁷⁶Tm
70	¹⁶⁵Yb	¹⁷⁶Yb
71	¹⁶⁶Lu	¹⁷⁶Lu
72	¹⁶⁷Hf	¹⁷⁶Hf
73	¹⁶⁸Ta	¹⁷⁶Ta
74	¹⁶⁹W	¹⁷⁶W
75	¹⁷⁰Re	¹⁷⁶Re
76	¹⁷¹Os	¹⁷⁶Os
77	¹⁷²Ir	¹⁷⁶Ir
78	¹⁷³Pt	¹⁷⁶Pt
79	¹⁷⁴Au	¹⁷⁶Au
80	¹⁷⁵Hg	¹⁷⁶Hg
81	¹⁷⁶Tl	¹⁷⁶Tl