Manganese-50m

Properties and data of the isotope ⁵⁰Mn.

Content

General data

Name of the isotope:Manganese-50m; Mn-50mSymbol:⁵⁰Mn or 5025MnMass number A:50 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:25Isotopic mass:49.9542374(5) u (atomic weight of Manganese-50m)
Excitation energy: 225.28(9) keVNuclide mass:49.9405232 u (calculated nuclear mass without electrons)Mass excess:-42.62759 MeVMass defect:0.4580113 u (per nucleus)Nuclear binding energy:426.63477788 MeV (per nucleus)
8.53269556 MeV (average binding energy per nucleon)Half-life:1.75(3) minDecay constant λ:0.0066014017196185 s^-1Specific activity α:8.113177760932 × 10⁺¹⁹ Bq g^-1
2192750746.1981 Ci g^-1Spin and parity:
(nuclear angular momentum)5+Magnetic dipole moment:μ(μ_N) = +2.76(1)Quadrupole moment Q:+0.80(12) barn (100 fm²)Nuclear g-factor:g_l = 0.552

Radioactive Decay

Half-life T_½ = 1.75(3) min (minutes) respectively 1.05 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE β⁺	⁵⁰Cr	100 %	7.887 MeV

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
⁵⁰Mn		283.19(10) ms	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 25) and isobaric (same nucleon number A = 50) with Manganese-50m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 25	Isobar A = 50
11	³⁶Na
12	³⁷Mg
13	³⁸Al
14	³⁹Si
15	⁴⁰P
16	⁴¹S
17	⁴²Cl	⁵⁰Cl
18	⁴³Ar	⁵⁰Ar
19	⁴⁴K	⁵⁰K
20	⁴⁵Ca	⁵⁰Ca
21	⁴⁶Sc	⁵⁰Sc
22	⁴⁷Ti	⁵⁰Ti
23	⁴⁸V	⁵⁰V
24	⁴⁹Cr	⁵⁰Cr
25	⁵⁰Mn	⁵⁰Mn
26	⁵¹Fe	⁵⁰Fe
27	⁵²Co	⁵⁰Co
28	⁵³Ni	⁵⁰Ni
29	⁵⁴Cu
30	⁵⁵Zn