Manganese-48

Properties and data of the isotope ⁴⁸Mn.

Content

General data

Name of the isotope:Manganese-48; Mn-48Symbol:⁴⁸Mn or 4825MnMass number A:48 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:23Isotopic mass:47.968549(7) u (atomic weight of Manganese-48)Nuclide mass:47.9548348 u (calculated nuclear mass without electrons)Mass excess:-29.29642 MeVMass defect:0.426369868 u (per nucleus)Nuclear binding energy:397.16097382 MeV (per nucleus)
8.27418695 MeV (average binding energy per nucleon)Separation energy:S_N = 14.80(3) MeV (first neutron)
S_P = 2.023(6) MeV (first proton)Half-life:158.1(22) msDecay constant λ:4.3842326411129 s^-1Specific activity α:5.617546069683 × 10⁺²² Bq g^-1
1518255694509.2 Ci g^-1Spin and parity:
(nuclear angular momentum)4+Isobaric spin: 1Mirror nucleus:Vanadium-48Year of discovery:1987

Radioactive Decay

Half-life T_½ = 158.1(22) ms respectively 1.581 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy
β⁺	⁴⁸Cr	99.71 %	13.526(10) MeV
β⁺, p	⁴⁷V	0.027 %
β⁺, α	⁴⁴Ti	6 x 10^-4%

Parent Nuclides

Direct parent isotope is: ⁴⁸Fe.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 23) and isobaric (same nucleon number A = 48) with Manganese-48. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 23	Isobar A = 48
10	³³Ne
11	³⁴Na
12	³⁵Mg
13	³⁶Al
14	³⁷Si
15	³⁸P
16	³⁹S	⁴⁸S
17	⁴⁰Cl	⁴⁸Cl
18	⁴¹Ar	⁴⁸Ar
19	⁴²K	⁴⁸K
20	⁴³Ca	⁴⁸Ca
21	⁴⁴Sc	⁴⁸Sc
22	⁴⁵Ti	⁴⁸Ti
23	⁴⁶V	⁴⁸V
24	⁴⁷Cr	⁴⁸Cr
25	⁴⁸Mn	⁴⁸Mn
26	⁴⁹Fe	⁴⁸Fe
27	⁵⁰Co	⁴⁸Co
28	⁵¹Ni	⁴⁸Ni