Hafnium-182m

Properties and data of the isotope ^182mHf.

Contents

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

General data

Name of the isotope:Hafnium-182m; Hf-182mSymbol:^182mHf or 182m72HfMass number A:182 (= number of nucleons)Atomic number Z:72 (= number of protons)Neutrons N:110Isotopic mass:181.950564(7) u (atomic weight of Hafnium-182m)
Excitation energy: 1172.87(18) keVNuclide mass:181.91107 u (calculated nuclear mass without electrons)Mass excess:-46.04934 MeVMass defect:1.565979064 u (per nucleus)Nuclear binding energy:1458.70010224 MeV (per nucleus)
8.01483573 MeV (average binding energy per nucleon)Half-life:61.5(15) minDecay constant λ:0.00018784476437939 s^-1Specific activity α:6.249876413780 × 10⁺¹⁷ Bq g^-1
16891557.875083 Ci g^-1Spin and parity:
(nuclear angular momentum)(8-)

Radioactive Decay

Half-life T_½ = 61.5(15) min (minutes) respectively 3.690 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁸²Ta	54(2) %
Iso	¹⁸²Hf	46(2) %

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
¹⁸²Hf		8.90(9) × 10⁶ a	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 182) with Hafnium-182m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 110	Isobar A = 182
69	¹⁷⁹Tm
70	¹⁸⁰Yb	¹⁸²Yb
71	¹⁸¹Lu	¹⁸²Lu
72	¹⁸²Hf	¹⁸²Hf
73	¹⁸³Ta	¹⁸²Ta
74	¹⁸⁴W	¹⁸²W
75	¹⁸⁵Re	¹⁸²Re
76	¹⁸⁶Os	¹⁸²Os
77	¹⁸⁷Ir	¹⁸²Ir
78	¹⁸⁸Pt	¹⁸²Pt
79	¹⁸⁹Au	¹⁸²Au
80	¹⁹⁰Hg	¹⁸²Hg
81	¹⁹¹Tl	¹⁸²Tl
82	¹⁹²Pb	¹⁸²Pb
83	¹⁹³Bi
84	¹⁹⁴Po
85	¹⁹⁵At
86	¹⁹⁶Rn