Yttrium-92

Properties and data of the isotope ⁹²Y.

Contents

General data

Name of the isotope:Yttrium-92; Y-92Symbol:⁹²Y or 9239YMass number A:92 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:53Isotopic mass:91.908946(10) u (atomic weight of Yttrium-92)Nuclide mass:91.8875523 u (calculated nuclear mass without electrons)Mass excess:-84.81625 MeVMass defect:0.85547079600001 u (per nucleus)Nuclear binding energy:796.86591365 MeV (per nucleus)
8.66158602 MeV (average binding energy per nucleon)Separation energy:S_N = 6.537(9) MeV (first neutron)
S_P = 8.454(11) MeV (first proton)Half-life:3.54(1) hDecay constant λ:5.439008008160 × 10^-5 s^-1Specific activity α:3.599392567413 × 10⁺¹⁷ Bq g^-1
9728088.0200373 Ci g^-1Spin and parity:
(nuclear angular momentum)2-Magnetic dipole moment:μ(μ_N) = - 0.67(2)Nuclear g-factor:g_l = -0.335Charge radius:4.2887(50) femtometer fmYear of discovery:1940

Radioactive Decay

Half-life T_½ = 3.54(1) h (hours) respectively 1.2744 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹²Zr	100 %	3.643(9) MeV

Parent Nuclides

Direct parent isotope is: ⁹²Sr.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 53) and isobaric (same nucleon number A = 92) with Yttrium-92. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 53	Isobar A = 92
29	⁸²Cu
30	⁸³Zn
31	⁸⁴Ga
32	⁸⁵Ge
33	⁸⁶As	⁹²As
34	⁸⁷Se	⁹²Se
35	⁸⁸Br	⁹²Br
36	⁸⁹Kr	⁹²Kr
37	⁹⁰Rb	⁹²Rb
38	⁹¹Sr	⁹²Sr
39	⁹²Y	⁹²Y
40	⁹³Zr	⁹²Zr
41	⁹⁴Nb	⁹²Nb
42	⁹⁵Mo	⁹²Mo
43	⁹⁶Tc	⁹²Tc
44	⁹⁷Ru	⁹²Ru
45	⁹⁸Rh	⁹²Rh
46	⁹⁹Pd	⁹²Pd
47	¹⁰⁰Ag	⁹²Ag
48	¹⁰¹Cd
49	¹⁰²In
50	¹⁰³Sn
51	¹⁰⁴Sb
52	¹⁰⁵Te