Manganese-52m

Properties and data of the isotope ⁵²Mn.

Content

General data

Name of the isotope:Manganese-52m; Mn-52mSymbol:⁵²Mn or 5225MnMass number A:52 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:27Isotopic mass:51.9455635 u (atomic weight of Manganese-52m)
Excitation energy: 377.749(5) keVNuclide mass:51.9318493 u (calculated nuclear mass without electrons)Mass excess:-50.70727 MeVMass defect:0.484015032 u (per nucleus)Nuclear binding energy:450.85709822 MeV (per nucleus)
8.67032881 MeV (average binding energy per nucleon)Half-life:21.1(2) minDecay constant λ:0.00054750962129538 s^-1Specific activity α:6.46505894433 × 10⁺¹⁸ Bq g^-1
174731322.81989 Ci g^-1Spin and parity:
(nuclear angular momentum)2+Magnetic dipole moment:μ(μ_N) = 0.00766(8)Nuclear g-factor:g_l = 0.00383

Radioactive Decay

Half-life T_½ = 21.1(2) min (minutes) respectively 1.266 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE β⁺	⁵²Cr	98.22(5) %	5.09 MeV
Iso	⁵²Mn	1.78(5) %	0.378 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
⁵²Mn		5.591(3) d	6+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 27) and isobaric (same nucleon number A = 52) with Manganese-52m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 27	Isobar A = 52
11	³⁸Na
12	³⁹Mg
13	⁴⁰Al
14	⁴¹Si
15	⁴²P
16	⁴³S
17	⁴⁴Cl
18	⁴⁵Ar	⁵²Ar
19	⁴⁶K	⁵²K
20	⁴⁷Ca	⁵²Ca
21	⁴⁸Sc	⁵²Sc
22	⁴⁹Ti	⁵²Ti
23	⁵⁰V	⁵²V
24	⁵¹Cr	⁵²Cr
25	⁵²Mn	⁵²Mn
26	⁵³Fe	⁵²Fe
27	⁵⁴Co	⁵²Co
28	⁵⁵Ni	⁵²Ni
29	⁵⁶Cu
30	⁵⁷Zn
31	⁵⁸Ga
32	⁵⁹Ge