Zinc-71

Properties and data of the isotope ⁷¹Zn.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Zinc-71; Zn-71Symbol:⁷¹Zn or 7130ZnMass number A:71 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:41Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3666666666667 (= neutron-proton ratio)Neutron excess (N-Z):11Isotopic mass:70.9277196(28) u (atomic weight of Zinc-71)Nuclide 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)Separation energy:S_N = 5.835(3) MeV (first neutron)
S_P = 11.6414(29) MeV (first proton)Half-life:2.45(10) minDecay constant λ:0.0047152869425847 s^-1Specific activity α:4.056588880466 × 10⁺¹⁹ Bq g^-1
1096375373.0991 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-Magnetic dipole moment:μ(μ_N) = +0.551(1)Nuclear g-factor:g_l = 1.102Year of discovery:1955

Radioactive Decay

Half-life T_½ = 2.45(10) min (minutes) respectively 1.47 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷¹Ga	100 %	2.8104(28) MeV

Parent Nuclides

Direct parent isotope is: ⁷¹Cu.

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
^71mZn	157.7(13) keV	3.96(5) h	9/2+

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-71. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 41	Isobar A = 71
21	⁶²Sc
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