Yttrium-94m

Properties and data of the isotope ^94mY.

Contents

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

General data

Name of the isotope:Yttrium-94m; Y-94mSymbol:^94mY or 94m39YMass number A:94 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:55Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4102564102564 (= neutron-proton ratio)Neutron excess (N-Z):16Excitation energy:1202.3 keVIsotopic mass:93.911592(7) u (atomic weight of Yttrium-94m)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)Half-life:1.35(2) μsDecay constant λ:513442.35597033 s^-1Specific activity α:3.324755044205 × 10⁺²⁷ Bq g^-1
8.985824443798 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)(5+)

Radioactive Decay

Half-life T_½ = 1.35(2) μs respectively 1.35 × 10^-6 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁹⁴Y	100 %

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
⁹⁴Y		18.7(1) min	2-

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-94m. 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