Iron-65m2

Properties and data of the isotope ^65m2Fe.

Contents

General data

Name of the isotope:Iron-65m2; Fe-65m2Symbol:^65m2Fe or 65m226FeMass number A:65 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:39Isotopic mass:64.94538(26) u (atomic weight of Iron-65m2)
Excitation energy: 402(5) keVNuclide mass:64.9311173 u (calculated nuclear mass without electrons)Mass excess:-50.8782 MeVMass defect:0.596002556 u (per nucleus)Nuclear binding energy:555.1728049 MeV (per nucleus)
8.54112008 MeV (average binding energy per nucleon)Half-life:1.12(5) sDecay constant λ:0.61888141121424 s^-1Specific activity α:5.823423490513 × 10⁺²¹ Bq g^-1
157389824067.93 Ci g^-1Spin and parity:
(nuclear angular momentum)(9/2+)

Radioactive Decay

Half-life T_½ = 1.12(5) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁵Co	100 %	100 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
⁶⁵Fe		0.81(5) s	(1/2-)
^65m1Fe	364 keV	0.43(13) μs	(3/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 39) and isobaric (same nucleon number A = 65) with Iron-65m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 39	Isobar A = 65
21	⁶⁰Sc
22	⁶¹Ti
23	⁶²V	⁶⁵V
24	⁶³Cr	⁶⁵Cr
25	⁶⁴Mn	⁶⁵Mn
26	⁶⁵Fe	⁶⁵Fe
27	⁶⁶Co	⁶⁵Co
28	⁶⁷Ni	⁶⁵Ni
29	⁶⁸Cu	⁶⁵Cu
30	⁶⁹Zn	⁶⁵Zn
31	⁷⁰Ga	⁶⁵Ga
32	⁷¹Ge	⁶⁵Ge
33	⁷²As	⁶⁵As
34	⁷³Se	⁶⁵Se
35	⁷⁴Br
36	⁷⁵Kr
37	⁷⁶Rb
38	⁷⁷Sr
39	⁷⁸Y
40	⁷⁹Zr
42	⁸¹Mo