Yttrium-82

Properties and data of the isotope ⁸²Y.

Content

General data

Name of the isotope:Yttrium-82; Y-82Symbol:⁸²Y or 8239YMass number A:82 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:43Isotopic mass:81.926930(6) u (atomic weight of Yttrium-82)Nuclide mass:81.9055363 u (calculated nuclear mass without electrons)Mass excess:-68.06427 MeVMass defect:0.750837636 u (per nucleus)Nuclear binding energy:699.40075291 MeV (per nucleus)
8.52927747 MeV (average binding energy per nucleon)Separation energy:S_N = 10.422(8) MeV (first neutron)
S_P = 3.825(6) MeV (first proton)Half-life:8.30(20) sDecay constant λ:0.083511708501198 s^-1Specific activity α:6.208879901829 × 10⁺²⁰ Bq g^-1
16780756491.431 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1980

Radioactive Decay

Half-life T_½ = 8.30(20) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁸²Sr	100 %	7.746(8) MeV

Parent Nuclides

Direct parent isotope is: ⁸²Zr.

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
^82m1Y	402.63(14) keV	268(25) ns	4-
^82m2Y	507.50(13) keV	147(7) ns	6+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 82) with Yttrium-82. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 43	Isobar A = 82
23	⁶⁶V
24	⁶⁷Cr
25	⁶⁸Mn
26	⁶⁹Fe
27	⁷⁰Co
28	⁷¹Ni
29	⁷²Cu	⁸²Cu
30	⁷³Zn	⁸²Zn
31	⁷⁴Ga	⁸²Ga
32	⁷⁵Ge	⁸²Ge
33	⁷⁶As	⁸²As
34	⁷⁷Se	⁸²Se
35	⁷⁸Br	⁸²Br
36	⁷⁹Kr	⁸²Kr
37	⁸⁰Rb	⁸²Rb
38	⁸¹Sr	⁸²Sr
39	⁸²Y	⁸²Y
40	⁸³Zr	⁸²Zr
41	⁸⁴Nb	⁸²Nb
42	⁸⁵Mo	⁸²Mo
43	⁸⁶Tc
44	⁸⁷Ru