Zinc-67

Properties and data of the isotope ⁶⁷Zn.

Contents

General Data

Parent Nuclides

NMR Data

Isotones und Isobares

Literature

Zinc-67 is a stable isotope of the chemical element zinc, comprising 4.04% of terrestrial zinc deposits. The atomic nucleus of this nuclide contains the element-specific 30 protons and 37 neutrons; the sum of these nuclear constituents results in a mass number of 67.

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

General data

Name of the isotope:Zinc-67; Zn-67Symbol:⁶⁷Zn or 6730ZnMass number A:67 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:37Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.2333333333333 (= neutron-proton ratio)Neutron excess (N-Z):7Isotopic mass:66.9271274(8) u (atomic weight of Zinc-67)Nuclide mass:66.9106705 u (calculated nuclear mass without electrons)Mass excess:-67.88039 MeVMass defect:0.628225452 u (per nucleus)Nuclear binding energy:585.18823919 MeV (per nucleus)
8.73415282 MeV (average binding energy per nucleon)Separation energy:S_N = 7.05247(23) MeV (first neutron)
S_P = 8.9111(9) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)5/2-Magnetic dipole moment:μ(μ_N) = +0.875479(9)Charge radius:3.9530(27) femtometer fmYear of discovery:1928 [1]

Parent Nuclides

Direct parent isotopes are: ⁶⁷Ga, ⁶⁷Cu.

Occurrence

Comparison of the natural Zinc isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Zinc Isotopic mixture	65.38 u	100 %
Isotope ⁶⁴Zn	63.929142(5) u	49.17(75) %	stable	0+
Isotope ⁶⁶Zn	65.926034(6) u	27.73(98) %	stable	0+
Isotope ⁶⁸Zn	67.924845(6) u	18.45(63) %	stable	0+
Isotope ⁷⁰Zn	69.92532(2) u	0.61(10) %	3.8 × 10¹⁸ a	0+
Isotope ⁶⁷Zn	66.9271274(8) u	4.04(16) %	stable	5/2-

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ⁶⁷Zn

Isotope:⁶⁷Zn-NMRQuantity:4.04(16) %Spin:5/2-Nuclearmagnetic moment
μ/μ_N:+0.875479(9)Gyromagnetic ratio γ:1.676688 · 10⁷ rad T^-1 s^-1
2.66853 MHz T^-1Nuclear g-factor:g_l = 0.3501916Quadrupole moment Q:+0.122(10) barn (100 fm²)Line width parameter (factor):l = 47.63 fm⁴Resonance frequency:v₀ = 2.6685 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.00287 (H₀ = const.)
0.7312 (v₀ = const.)
0.000118 (at natural abundance)
relative receptivity as compared to ¹³C:
0.692 (at natural abundance)
16.9 (enriched)Reference compound:
(conditions)Saturated solution of Zinc nitrate Zn(NO₃)₂ in deuterium oxide D₂O (IUPAC). Other zinc compounds, such as Zinc chlorate, are also used.Frequency ratio:Ξ(⁶⁷Zn) = 6.256803 % [based on the reference substance]Chemical shift range:ca. 2700 ppm [-2700 to 0]

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
^67m2Zn	604.48(5) keV	333(14) ns	9/2+
^67m1Zn	93.312(5) keV	9.15(7) μs	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 37) and isobaric (same nucleon number A = 67) with Zinc-67. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 37	Isobar A = 67
19	⁵⁶K
20	⁵⁷Ca
21	⁵⁸Sc
22	⁵⁹Ti
23	⁶⁰V	⁶⁷V
24	⁶¹Cr	⁶⁷Cr
25	⁶²Mn	⁶⁷Mn
26	⁶³Fe	⁶⁷Fe
27	⁶⁴Co	⁶⁷Co
28	⁶⁵Ni	⁶⁷Ni
29	⁶⁶Cu	⁶⁷Cu
30	⁶⁷Zn	⁶⁷Zn
31	⁶⁸Ga	⁶⁷Ga
32	⁶⁹Ge	⁶⁷Ge
33	⁷⁰As	⁶⁷As
34	⁷¹Se	⁶⁷Se
35	⁷²Br	⁶⁷Br
36	⁷³Kr	⁶⁷Kr
37	⁷⁴Rb
38	⁷⁵Sr
39	⁷⁶Y
40	⁷⁷Zr