Zinc-61

Properties and data of the isotope ⁶¹Zn.

Content

General data

Name of the isotope:Zinc-61; Zn-61Symbol:⁶¹Zn or 6130ZnMass number A:61 (= number of nucleons)Atomic number Z:30 (= number of protons)Neutrons N:31Isotopic mass:60.939507(17) u (atomic weight of Zinc-61)Nuclide mass:60.9230501 u (calculated nuclear mass without electrons)Mass excess:-56.34887 MeVMass defect:0.563856356 u (per nucleus)Nuclear binding energy:525.22881248 MeV (per nucleus)
8.6103084 MeV (average binding energy per nucleon)Separation energy:S_N = 10.246(16) MeV (first neutron)
S_P = 5.293(16) MeV (first proton)Half-life:89.1(2) sDecay constant λ:0.0077794296359141 s^-1Specific activity α:7.808136846240 × 10⁺¹⁹ Bq g^-1
2110307255.7406 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Mirror nucleus:Gallium-61Year of discovery:1955

Radioactive Decay

Half-life T_½ = 89.1(2) s respectively 8.91 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁶¹Cu	100 %	5.635(16) MeV

Parent Nuclides

Direct parent isotope is: ⁶¹Ga.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 31) and isobaric (same nucleon number A = 61) with Zinc-61. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 31	Isobar A = 61
15	⁴⁶P
16	⁴⁷S
17	⁴⁸Cl
18	⁴⁹Ar
19	⁵⁰K
20	⁵¹Ca
21	⁵²Sc	⁶¹Sc
22	⁵³Ti	⁶¹Ti
23	⁵⁴V	⁶¹V
24	⁵⁵Cr	⁶¹Cr
25	⁵⁶Mn	⁶¹Mn
26	⁵⁷Fe	⁶¹Fe
27	⁵⁸Co	⁶¹Co
28	⁵⁹Ni	⁶¹Ni
29	⁶⁰Cu	⁶¹Cu
30	⁶¹Zn	⁶¹Zn
31	⁶²Ga	⁶¹Ga
32	⁶³Ge	⁶¹Ge
33	⁶⁴As
34	⁶⁵Se
35	⁶⁶Br
36	⁶⁷Kr