Manganese-58

Properties and data of the isotope ⁵⁸Mn.

Contents

General data

Name of the isotope:Manganese-58; Mn-58Symbol:⁵⁸Mn or 5825MnMass number A:58 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:33Isotopic mass:57.9400666(29) u (atomic weight of Manganese-58)Nuclide mass:57.9263524 u (calculated nuclear mass without electrons)Mass excess:-55.8276 MeVMass defect:0.541501428 u (per nucleus)Nuclear binding energy:504.40533117 MeV (per nucleus)
8.69664364 MeV (average binding energy per nucleon)Separation energy:S_N = 6.413(3) MeV (first neutron)
S_P = 10.5918(29) MeV (first proton)Half-life:3.0(1) sDecay constant λ:0.23104906018665 s^-1Specific activity α:2.441070150877 × 10⁺²¹ Bq g^-1
65974868942.627 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μ_N) = +2.623(2)Nuclear g-factor:g_l = 2.623Year of discovery:1961

Radioactive Decay

Half-life T_½ = 3.0(1) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁵⁸Fe	100 %	6.3276(27) MeV

Parent Nuclides

Direct parent isotope is: ⁵⁸Cr.

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
^58mMn	71.77(5) keV	65.4(5) s	4+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 33) and isobaric (same nucleon number A = 58) with Manganese-58. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 33	Isobar A = 58
16	⁴⁹S
17	⁵⁰Cl
18	⁵¹Ar
19	⁵²K
20	⁵³Ca	⁵⁸Ca
21	⁵⁴Sc	⁵⁸Sc
22	⁵⁵Ti	⁵⁸Ti
23	⁵⁶V	⁵⁸V
24	⁵⁷Cr	⁵⁸Cr
25	⁵⁸Mn	⁵⁸Mn
26	⁵⁹Fe	⁵⁸Fe
27	⁶⁰Co	⁵⁸Co
28	⁶¹Ni	⁵⁸Ni
29	⁶²Cu	⁵⁸Cu
30	⁶³Zn	⁵⁸Zn
31	⁶⁴Ga	⁵⁸Ga
32	⁶⁵Ge
33	⁶⁶As
34	⁶⁷Se
35	⁶⁸Br
36	⁶⁹Kr