Manganese-66

Properties and data of the isotope ⁶⁶Mn.

Content

General data

Name of the isotope:Manganese-66; Mn-66Symbol:⁶⁶Mn or 6625MnMass number A:66 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:41Isotopic mass:65.960547(12) u (atomic weight of Manganese-66)Nuclide mass:65.9468328 u (calculated nuclear mass without electrons)Mass excess:-36.75023 MeVMass defect:0.590340356 u (per nucleus)Nuclear binding energy:549.89849957 MeV (per nucleus)
8.33179545 MeV (average binding energy per nucleon)Separation energy:S_N = 3.854(12) MeV (first neutron)
S_P = 15.82(30) MeV (first proton)Half-life:65(2) msDecay constant λ:10.663802777845 s^-1Specific activity α:9.879834220118 × 10⁺²² Bq g^-1
2670225464896.8 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1992

Radioactive Decay

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

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁶Fe		13.317(12) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁶Cr.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 41) and isobaric (same nucleon number A = 66) with Manganese-66. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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