Manganese-52

Properties and data of the isotope ⁵²Mn.

Content

General data

Name of the isotope:Manganese-52; Mn-52Symbol:⁵²Mn or 5225MnMass number A:52 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:27Isotopic mass:51.9455635(20) u (atomic weight of Manganese-52)Nuclide 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)Separation energy:S_N = 10.5347(19) MeV (first neutron)
S_P = 6.5449(19) MeV (first proton)Half-life:5.591(3) dDecay constant λ:1.434901951714 × 10^-6 s^-1Specific activity α:1.694349347730 × 10⁺¹⁶ Bq g^-1
457932.25614327 Ci g^-1Spin and parity:
(nuclear angular momentum)6+Magnetic dipole moment:μ(μ_N) = +3.0622(12)Quadrupole moment Q:+0.50(7) barn (100 fm²)Nuclear g-factor:g_l = 0.51036666666667Charge radius:3.6706(128) femtometer fmMirror nucleus:Cobalt-52Year of discovery:1938

Radioactive Decay

Half-life T_½ = 5.591(3) d respectively 4.830624 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE β⁺	⁵²Cr	100 %	4.7120(19) MeV

Parent Nuclides

Direct parent isotope is: ⁵²Fe.

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
^52mMn	377.749(5) keV	21.1(2) min	2+

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-52. 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