Manganese-71

Properties and data of the isotope ⁷¹Mn.

Content

General data

Name of the isotope:Manganese-71; Mn-71Symbol:⁷¹Mn or 7125MnMass number A:71 (= number of nucleons)Atomic number Z:25 (= number of protons)Neutrons N:46Isotopic mass:70.98328(54) u (atomic weight of Manganese-71)Nuclide mass:70.9695658 u (calculated nuclear mass without electrons)Mass excess:-15.57458 MeVMass defect:0.61093193600001 u (per nucleus)Nuclear binding energy:569.07943279 MeV (per nucleus)
8.01520328 MeV (average binding energy per nucleon)Separation energy:S_N = 4.14(71) MeV (first neutron)
S_P = 18.38(78) MeV (first proton)Half-life:637 nsDecay constant λ:1088143.1405965 s^-1Specific activity α:9.361358954922 × 10⁺²⁷ Bq g^-1
2.530097014843 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 637 ns respectively 6.37 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	⁷¹Fe	?	15.86(64) MeV
β^-, n	⁷⁰Fe	?	12.87(64) MeV
β^-, 2n	⁶⁹Fe	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 46) and isobaric (same nucleon number A = 71) with Manganese-71. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 46	Isobar A = 71
25	⁷¹Mn	⁷¹Mn
26	⁷²Fe	⁷¹Fe
27	⁷³Co	⁷¹Co
28	⁷⁴Ni	⁷¹Ni
29	⁷⁵Cu	⁷¹Cu
30	⁷⁶Zn	⁷¹Zn
31	⁷⁷Ga	⁷¹Ga
32	⁷⁸Ge	⁷¹Ge
33	⁷⁹As	⁷¹As
34	⁸⁰Se	⁷¹Se
35	⁸¹Br	⁷¹Br
36	⁸²Kr	⁷¹Kr
37	⁸³Rb	⁷¹Rb
38	⁸⁴Sr
39	⁸⁵Y
40	⁸⁶Zr
41	⁸⁷Nb
42	⁸⁸Mo
43	⁸⁹Tc
44	⁹⁰Ru
45	⁹¹Rh
46	⁹²Pd
47	⁹³Ag
48	⁹⁴Cd