Manganese-55
Properties and data of the isotope 55Mn.
See also: list of Manganese isotopes.
General data
Name of the isotope:Manganese-55; Mn-55Symbol:55Mn or 5525MnMass number A:55 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:30Isotopic mass:54.938044(3) u (atomic weight of Manganese-55)Nuclide mass:54.9243298 u (calculated nuclear mass without electrons)Mass excess:-57.71164 MeVMass defect:0.51752928 u (per nucleus)Nuclear binding energy:482.07541914 MeV (per nucleus)
8.76500762 MeV (average binding energy per nucleon)Separation energy:SN = 10.2261(10) MeV (first neutron)
SP = 8.0666(3) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)5/2-Magnetic dipole moment:μ(μN) = +3.4669(6)Charge radius:3.7057(22) femtometer fmMirror nucleus:Zinc-55Year of discovery:1923
Parent Nuclides
Direct parent isotopes are: 55Fe, 55Cr.
Occurrence
Comparison of the natural Manganese isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| Atomic Mass ma | Quantity | Half-life | Spin |
---|
Manganese Isotopic mixture | 54.938043 u | 100 % | | |
Isotope 55Mn | 54.938044(3) u | 100 % | stable | 5/2- |
NMR data
Nuclear magnetic properties of the NMR active Nuclide 55Mn
Isotope:55Mn-NMRQuantity:100 %Spin:5/2-Nuclearmagnetic moment
μ/μN:+3.4669(6)Gyromagnetic ratio γ:6.608 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.38676Quadrupole moment Q:+ 0.33(1) barn (100 fm2)Resonance frequency:v0 = 10.5763 at 1 TRelative Sensitivity:0.17881 (H0 = const.)
2.8981 (v0 = const.)
[related to 1H = 1.000]
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 30) and isobaric (same nucleon number A = 55) with Manganese-55. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 30 | Isobar A = 55 |
13 | 43Al | |
14 | 44Si | |
15 | 45P | |
16 | 46S | |
17 | 47Cl | |
18 | 48Ar | |
19 | 49K | 55K |
20 | 50Ca | 55Ca |
21 | 51Sc | 55Sc |
22 | 52Ti | 55Ti |
23 | 53V | 55V |
24 | 54Cr | 55Cr |
25 | 55Mn | 55Mn |
26 | 56Fe | 55Fe |
27 | 57Co | 55Co |
28 | 58Ni | 55Ni |
29 | 59Cu | 55Cu |
30 | 60Zn | 55Zn |
31 | 61Ga | |
32 | 62Ge | |
33 | 63As | |
34 | 64Se | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/manganese-55
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