Yttrium-94

Properties and data of the isotope ⁹⁴Y.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Yttrium isotopes (and general data sources).

General data

Name of the isotope:Yttrium-94; Y-94Symbol:⁹⁴Y or 9439YMass number A:94 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:55Isotopic mass:93.911592(7) u (atomic weight of Yttrium-94)Nuclide mass:93.8901983 u (calculated nuclear mass without electrons)Mass excess:-82.35152 MeVMass defect:0.87015462800001 u (per nucleus)Nuclear binding energy:810.54381505 MeV (per nucleus)
8.62280654 MeV (average binding energy per nucleon)Separation energy:S_N = 6.196(12) MeV (first neutron)
S_P = 9.555(10) MeV (first proton)Half-life:18.7(1) minDecay constant λ:0.00061777823579318 s^-1Specific activity α:4.0003737162 × 10⁺¹⁸ Bq g^-1
108118208.54838 Ci g^-1Spin and parity:
(nuclear angular momentum)2-Magnetic dipole moment:μ(μ_N) = - 0.24(2)Nuclear g-factor:g_l = -0.12Charge radius:4.3142(74) femtometer fmYear of discovery:1948

Radioactive Decay

Half-life T_½ = 18.7(1) min (minutes) respectively 1.122 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁴Zr	100 %	4.918(6) MeV

Parent Nuclides

Direct parent isotope is: ⁹⁴Sr.

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
^94mY	1202.3 keV	1.35(2) μs	(5+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 55) and isobaric (same nucleon number A = 94) with Yttrium-94. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 55	Isobar A = 94
30	⁸⁵Zn
31	⁸⁶Ga
32	⁸⁷Ge
33	⁸⁸As
34	⁸⁹Se	⁹⁴Se
35	⁹⁰Br	⁹⁴Br
36	⁹¹Kr	⁹⁴Kr
37	⁹²Rb	⁹⁴Rb
38	⁹³Sr	⁹⁴Sr
39	⁹⁴Y	⁹⁴Y
40	⁹⁵Zr	⁹⁴Zr
41	⁹⁶Nb	⁹⁴Nb
42	⁹⁷Mo	⁹⁴Mo
43	⁹⁸Tc	⁹⁴Tc
44	⁹⁹Ru	⁹⁴Ru
45	¹⁰⁰Rh	⁹⁴Rh
46	¹⁰¹Pd	⁹⁴Pd
47	¹⁰²Ag	⁹⁴Ag
48	¹⁰³Cd	⁹⁴Cd
49	¹⁰⁴In
50	¹⁰⁵Sn
51	¹⁰⁶Sb
52	¹⁰⁷Te
53	¹⁰⁸I
54	¹⁰⁹Xe