Manganese-44

Properties and data of the isotope ⁴⁴Mn.

Content

General data

Name of the isotope:Manganese-44; Mn-44Symbol:⁴⁴Mn or 4425MnMass number A:44 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:19Isotopic mass:44.00755(54) u (atomic weight of Manganese-44)Nuclide mass:43.9938358 u (calculated nuclear mass without electrons)Mass excess:7.03278 MeVMass defect:0.352709204 u (per nucleus)Nuclear binding energy:328.54650727 MeV (per nucleus)
7.46696607 MeV (average binding energy per nucleon)Half-life:105 nsDecay constant λ:6601401.7196185 s^-1Specific activity α:9.035129779220 × 10⁺²⁸ Bq g^-1
2.44192696735 × 10⁺¹⁸ Ci g^-1Spin and parity:
(nuclear angular momentum)(2-)~Mirror nucleus:Potassium-44

Radioactive Decay

Half-life T_½ = 105 ns respectively 1.05 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	⁴³Cr	?
EE/β⁺	⁴⁴Cr	?

Parent Nuclides

Direct parent isotope is: ⁴⁵Fe.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 19) and isobaric (same nucleon number A = 44) with Manganese-44. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 19	Isobar A = 44
8	²⁷O
9	²⁸F
10	²⁹Ne
11	³⁰Na
12	³¹Mg
13	³²Al
14	³³Si	⁴⁴Si
15	³⁴P	⁴⁴P
16	³⁵S	⁴⁴S
17	³⁶Cl	⁴⁴Cl
18	³⁷Ar	⁴⁴Ar
19	³⁸K	⁴⁴K
20	³⁹Ca	⁴⁴Ca
21	⁴⁰Sc	⁴⁴Sc
22	⁴¹Ti	⁴⁴Ti
23	⁴²V	⁴⁴V
24	⁴³Cr	⁴⁴Cr
25	⁴⁴Mn	⁴⁴Mn
26	⁴⁵Fe
27	⁴⁶Co