Thallium-183m2

Properties and data of the isotope ^183m2Tl.

Contents

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

General data

Name of the isotope:Thallium-183m2; Tl-183m2Symbol:^183m2Tl or 183m281TlMass number A:183 (= number of nucleons)Atomic number Z:81 (= number of protons)Neutrons N:102Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.2592592592593 (= neutron-proton ratio)Neutron excess (N-Z):21Excitation energy:975.01(23) keVIsotopic mass:182.982193(10) u (atomic weight of Thallium-183m2)Nuclide mass:182.937763 u (calculated nuclear mass without electrons)Mass excess:-16.58711 MeVMass defect:1.535456024 u (per nucleus)Nuclear binding energy:1430.26807362 MeV (per nucleus)
7.81567253 MeV (average binding energy per nucleon)Half-life:1.48(19) μsDecay constant λ:468342.68956753 s^-1Specific activity α:1.549684421591 × 10⁺²⁷ Bq g^-1
4.188336274572 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)(13/2+)

Radioactive Decay

Half-life T_½ = 1.48(19) μs respectively 1.48 × 10^-6 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁸³T	Tl	100 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹⁸³Tl		6.9(7) s	(1/2+)
^183m1Tl	628.7 keV	53.3(3) ms	(9/2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 102) and isobaric (same nucleon number A = 183) with Thallium-183m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 102	Isobar A = 183
60	¹⁶²Nd
61	¹⁶³Pm
62	¹⁶⁴Sm
63	¹⁶⁵Eu
64	¹⁶⁶Gd
65	¹⁶⁷Tb
66	¹⁶⁸Dy
67	¹⁶⁹Ho
68	¹⁷⁰Er
69	¹⁷¹Tm
70	¹⁷²Yb	¹⁸³Yb
71	¹⁷³Lu	¹⁸³Lu
72	¹⁷⁴Hf	¹⁸³Hf
73	¹⁷⁵Ta	¹⁸³Ta
74	¹⁷⁶W	¹⁸³W
75	¹⁷⁷Re	¹⁸³Re
76	¹⁷⁸Os	¹⁸³Os
77	¹⁷⁹Ir	¹⁸³Ir
78	¹⁸⁰Pt	¹⁸³Pt
79	¹⁸¹Au	¹⁸³Au
80	¹⁸²Hg	¹⁸³Hg
81	¹⁸³Tl	¹⁸³Tl
82	¹⁸⁴Pb	¹⁸³Pb
83	¹⁸⁵Bi
84	¹⁸⁶Po