Zinc-71m

Properties and data of the isotope ^71mZn.

Contents

General data

Name of the isotope:Zinc-71m; Zn-71mSymbol:^71mZn or 71m30ZnMass number A:71 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:41Isotopic mass:70.9277196(28) u (atomic weight of Zinc-71m)
Excitation energy: 157.7(13) keVNuclide mass:70.9112627 u (calculated nuclear mass without electrons)Mass excess:-67.32876 MeVMass defect:0.662292916 u (per nucleus)Nuclear binding energy:616.9218775 MeV (per nucleus)
8.68904053 MeV (average binding energy per nucleon)Half-life:3.96(5) hDecay constant λ:4.862143522446 × 10^-5 s^-1Specific activity α:4.18293045334 × 10⁺¹⁷ Bq g^-1
11305217.441468 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = -1.052(6)Nuclear g-factor:g_l = -0.23377777777778

Radioactive Decay

Half-life T_½ = 3.96(5) h (hours) respectively 1.4256 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷¹Ga	> 99.95 %
Iso	⁷¹Zn	< 0.05 %

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
⁷¹Zn		2.45(10) min	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 41) and isobaric (same nucleon number A = 71) with Zinc-71m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 41	Isobar A = 71
22	⁶³Ti
23	⁶⁴V
24	⁶⁵Cr
25	⁶⁶Mn	⁷¹Mn
26	⁶⁷Fe	⁷¹Fe
27	⁶⁸Co	⁷¹Co
28	⁶⁹Ni	⁷¹Ni
29	⁷⁰Cu	⁷¹Cu
30	⁷¹Zn	⁷¹Zn
31	⁷²Ga	⁷¹Ga
32	⁷³Ge	⁷¹Ge
33	⁷⁴As	⁷¹As
34	⁷⁵Se	⁷¹Se
35	⁷⁶Br	⁷¹Br
36	⁷⁷Kr	⁷¹Kr
37	⁷⁸Rb	⁷¹Rb
38	⁷⁹Sr
39	⁸⁰Y
40	⁸¹Zr
41	⁸²Nb
42	⁸³Mo
44	⁸⁵Ru