Manganese-65

Properties and data of the isotope ⁶⁵Mn.

Content

General data

Name of the isotope:Manganese-65; Mn-65Symbol:⁶⁵Mn or 6525MnMass number A:65 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:40Isotopic mass:64.956020(4) u (atomic weight of Manganese-65)Nuclide mass:64.9423058 u (calculated nuclear mass without electrons)Mass excess:-40.96711 MeVMass defect:0.58620244000001 u (per nucleus)Nuclear binding energy:546.04405565 MeV (per nucleus)
8.40067778 MeV (average binding energy per nucleon)Separation energy:S_N = 6.050(5) MeV (first neutron)
S_P = 14.78(44) MeV (first proton)Half-life:92(1) msDecay constant λ:7.5342084843472 s^-1Specific activity α:7.089385118885 × 10⁺²² Bq g^-1
1916050032131.3 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1985

Radioactive Decay

Half-life T_½ = 92(1) ms respectively 9.2 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁵Fe	79 %	10.251(6) MeV
β^-, n	⁶⁴Fe	21.0(5) %	5.931(6) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁵Cr.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 65) with Manganese-65. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 40	Isobar A = 65
21	⁶¹Sc
22	⁶²Ti
23	⁶³V	⁶⁵V
24	⁶⁴Cr	⁶⁵Cr
25	⁶⁵Mn	⁶⁵Mn
26	⁶⁶Fe	⁶⁵Fe
27	⁶⁷Co	⁶⁵Co
28	⁶⁸Ni	⁶⁵Ni
29	⁶⁹Cu	⁶⁵Cu
30	⁷⁰Zn	⁶⁵Zn
31	⁷¹Ga	⁶⁵Ga
32	⁷²Ge	⁶⁵Ge
33	⁷³As	⁶⁵As
34	⁷⁴Se	⁶⁵Se
35	⁷⁵Br
36	⁷⁶Kr
37	⁷⁷Rb
38	⁷⁸Sr
39	⁷⁹Y
40	⁸⁰Zr
41	⁸¹Nb
42	⁸²Mo