Manganese-45

Properties and data of the isotope ⁴⁵Mn.

Contents

See also: List of individual Manganese isotopes (and general data sources).

General data

Name of the isotope:Manganese-45; Mn-45Symbol:⁴⁵Mn or 4525MnMass number A:45 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:20Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):0.8 (= neutron-proton ratio)Neutron excess (N-Z):-5Isotopic mass:44.99436(43) u (atomic weight of Manganese-45)Nuclide mass:44.9806458 u (calculated nuclear mass without electrons)Mass excess:-5.25363 MeVMass defect:0.37456412 u (per nucleus)Nuclear binding energy:348.9042304 MeV (per nucleus)
7.75342734 MeV (average binding energy per nucleon)Half-life:< 70 nsDecay constant λ:9902102.5794278 s^-1Specific activity α:1.325318452207 × 10⁺²⁹ Bq g^-1
3.581941762723 × 10⁺¹⁸ Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2-)~Mirror nucleus:Calcium-45

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 20) and isobaric (same nucleon number A = 45) with Manganese-45. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 20	Isobar A = 45
8	²⁸O
9	²⁹F
10	³⁰Ne
11	³¹Na
12	³²Mg
13	³³Al
14	³⁴Si
15	³⁵P	⁴⁵P
16	³⁶S	⁴⁵S
17	³⁷Cl	⁴⁵Cl
18	³⁸Ar	⁴⁵Ar
19	³⁹K	⁴⁵K
20	⁴⁰Ca	⁴⁵Ca
21	⁴¹Sc	⁴⁵Sc
22	⁴²Ti	⁴⁵Ti
23	⁴³V	⁴⁵V
24	⁴⁴Cr	⁴⁵Cr
25	⁴⁵Mn	⁴⁵Mn
26	⁴⁶Fe	⁴⁵Fe
27	⁴⁷Co
28	⁴⁸Ni