Manganese-49

Properties and data of the isotope ⁴⁹Mn.

Content

General data

Name of the isotope:Manganese-49; Mn-49Symbol:⁴⁹Mn or 4925MnMass number A:49 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:24Isotopic mass:48.9596126(24) u (atomic weight of Manganese-49)Nuclide mass:48.9458984 u (calculated nuclear mass without electrons)Mass excess:-37.62062 MeVMass defect:0.44397118400001 u (per nucleus)Nuclear binding energy:413.55649407 MeV (per nucleus)
8.43992845 MeV (average binding energy per nucleon)Separation energy:S_N = 16.396(7) MeV (first neutron)
S_P = 2.088(8) MeV (first proton)Half-life:382(7) msDecay constant λ:1.8145214150784 s^-1Specific activity α:2.276521573952 × 10⁺²² Bq g^-1
615276101068.35 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2-Isobaric spin: 1/2Mirror nucleus:Chromium-49Year of discovery:1970

Radioactive Decay

Half-life T_½ = 382(7) ms respectively 3.82 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	⁴⁹Cr	100 %	7.712(3) MeV

Parent Nuclides

Direct parent isotope is: ⁴⁹Fe.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 24) and isobaric (same nucleon number A = 49) with Manganese-49. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 24	Isobar A = 49
10	³⁴Ne
11	³⁵Na
12	³⁶Mg
13	³⁷Al
14	³⁸Si
15	³⁹P
16	⁴⁰S	⁴⁹S
17	⁴¹Cl	⁴⁹Cl
18	⁴²Ar	⁴⁹Ar
19	⁴³K	⁴⁹K
20	⁴⁴Ca	⁴⁹Ca
21	⁴⁵Sc	⁴⁹Sc
22	⁴⁶Ti	⁴⁹Ti
23	⁴⁷V	⁴⁹V
24	⁴⁸Cr	⁴⁹Cr
25	⁴⁹Mn	⁴⁹Mn
26	⁵⁰Fe	⁴⁹Fe
27	⁵¹Co	⁴⁹Co
28	⁵²Ni	⁴⁹Ni
29	⁵³Cu
30	⁵⁴Zn