Iron-70

Properties and data of the isotope ⁷⁰Fe.

Contents

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

General data

Name of the isotope:Iron-70; Fe-70Symbol:⁷⁰Fe or 7026FeMass number A:70 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:44Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.6923076923077 (= neutron-proton ratio)Neutron excess (N-Z):18Isotopic mass:69.96080(43) u (atomic weight of Iron-70)Nuclide mass:69.9465373 u (calculated nuclear mass without electrons)Mass excess:-36.51456 MeVMass defect:0.623907136 u (per nucleus)Nuclear binding energy:581.16575374 MeV (per nucleus)
8.30236791 MeV (average binding energy per nucleon)Separation energy:S_N = 5.55(56) MeV (first neutron)
S_P = 19.03(56) MeV (first proton)Half-life:65(6) msDecay constant λ:10.663802777845 s^-1Specific activity α:9.307090207357 × 10⁺²² Bq g^-1
2515429785772.4 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1997

Radioactive Decay

Half-life T_½ = 65(6) ms respectively 6.5 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁷⁰Co	100 %	10.12(59) MeV
β^-, n	⁶⁹Co	?	5.70(42) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 70) with Iron-70. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 44	Isobar A = 70
22	⁶⁶Ti
23	⁶⁷V
24	⁶⁸Cr
25	⁶⁹Mn	⁷⁰Mn
26	⁷⁰Fe	⁷⁰Fe
27	⁷¹Co	⁷⁰Co
28	⁷²Ni	⁷⁰Ni
29	⁷³Cu	⁷⁰Cu
30	⁷⁴Zn	⁷⁰Zn
31	⁷⁵Ga	⁷⁰Ga
32	⁷⁶Ge	⁷⁰Ge
33	⁷⁷As	⁷⁰As
34	⁷⁸Se	⁷⁰Se
35	⁷⁹Br	⁷⁰Br
36	⁸⁰Kr	⁷⁰Kr
37	⁸¹Rb
38	⁸²Sr
39	⁸³Y
40	⁸⁴Zr
41	⁸⁵Nb
42	⁸⁶Mo
43	⁸⁷Tc
44	⁸⁸Ru
45	⁸⁹Rh
46	⁹⁰Pd