Rhenium-182m

Properties and data of the isotope ^182mRe.

Contents

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

General data

Name of the isotope:Rhenium-182m; Re-182mSymbol:^182mRe or 182m75ReMass number A:182 (= number of nucleons)Atomic number Z:75 (= number of protons)Neutrons N:107Isotopic mass:181.95121(11) u (atomic weight of Rhenium-182m)Nuclide mass:181.9100707 u (calculated nuclear mass without electrons)Mass excess:-45.44759 MeVMass defect:1.562813412 u (per nucleus)Nuclear binding energy:1455.7513164 MeV (per nucleus)
7.99863361 MeV (average binding energy per nucleon)Half-life:14.14(45) hDecay constant λ:1.361675272198 × 10^-5 s^-1Specific activity α:4.530497400371 × 10⁺¹⁶ Bq g^-1
1224458.7568571 Ci g^-1Spin and parity:
(nuclear angular momentum)2+Magnetic dipole moment:μ(μ_N) = 3.26(10)Quadrupole moment Q:+1.8(2) barn (100 fm²)Nuclear g-factor:g_l = 1.63

Radioactive Decay

Half-life T_½ = 14.14(45) h (hours) respectively 5.0904 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁸²W	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
¹⁸²Re		64.2(5) h	7+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 182) with Rhenium-182m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 107	Isobar A = 182
65	¹⁷²Tb
66	¹⁷³Dy
67	¹⁷⁴Ho
68	¹⁷⁵Er
69	¹⁷⁶Tm
70	¹⁷⁷Yb	¹⁸²Yb
71	¹⁷⁸Lu	¹⁸²Lu
72	¹⁷⁹Hf	¹⁸²Hf
73	¹⁸⁰Ta	¹⁸²Ta
74	¹⁸¹W	¹⁸²W
75	¹⁸²Re	¹⁸²Re
76	¹⁸³Os	¹⁸²Os
77	¹⁸⁴Ir	¹⁸²Ir
78	¹⁸⁵Pt	¹⁸²Pt
79	¹⁸⁶Au	¹⁸²Au
80	¹⁸⁷Hg	¹⁸²Hg
81	¹⁸⁸Tl	¹⁸²Tl
82	¹⁸⁹Pb	¹⁸²Pb
83	¹⁹⁰Bi
84	¹⁹¹Po
85	¹⁹²At
86	¹⁹³Rn