Zinc-65m

Properties and data of the isotope ⁶⁵Zn.

Content

General data

Name of the isotope:Zinc-65m; Zn-65mSymbol:⁶⁵Zn or 6530ZnMass number A:65 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:35Isotopic mass:64.9292405(7) u (atomic weight of Zinc-65m)
Excitation energy: 53.928(10) keVNuclide mass:64.9127836 u (calculated nuclear mass without electrons)Mass excess:-65.91205 MeVMass defect:0.60878251999999 u (per nucleus)Nuclear binding energy:567.07726468 MeV (per nucleus)
8.72426561 MeV (average binding energy per nucleon)Half-life:1.6(6) μsDecay constant λ:433216.98784997 s^-1Specific activity α:4.076396443359 × 10⁺²⁷ Bq g^-1
1.101728768475 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(1/2)-

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
⁶⁵Zn		243.93(9) d	5/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 35) and isobaric (same nucleon number A = 65) with Zinc-65m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 35	Isobar A = 65
18	⁵³Ar
19	⁵⁴K
20	⁵⁵Ca
21	⁵⁶Sc
22	⁵⁷Ti
23	⁵⁸V	⁶⁵V
24	⁵⁹Cr	⁶⁵Cr
25	⁶⁰Mn	⁶⁵Mn
26	⁶¹Fe	⁶⁵Fe
27	⁶²Co	⁶⁵Co
28	⁶³Ni	⁶⁵Ni
29	⁶⁴Cu	⁶⁵Cu
30	⁶⁵Zn	⁶⁵Zn
31	⁶⁶Ga	⁶⁵Ga
32	⁶⁷Ge	⁶⁵Ge
33	⁶⁸As	⁶⁵As
34	⁶⁹Se	⁶⁵Se
35	⁷⁰Br
36	⁷¹Kr
37	⁷²Rb
38	⁷³Sr