Yttrium-98m2

Properties and data of the isotope ⁹⁸Y.

Content

General data

Name of the isotope:Yttrium-98m2; Y-98m2Symbol:⁹⁸Y or 9839YMass number A:98 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:59Isotopic mass:97.922388(9) u (atomic weight of Yttrium-98m2)
Excitation energy: 410(30) keVNuclide mass:97.9009943 u (calculated nuclear mass without electrons)Mass excess:-72.29511 MeVMass defect:0.894018292 u (per nucleus)Nuclear binding energy:832.77267489 MeV (per nucleus)
8.49768036 MeV (average binding energy per nucleon)Half-life:2.0(2) sDecay constant λ:0.34657359027997 s^-1Specific activity α:2.151664926804 × 10⁺²¹ Bq g^-1
58153106129.841 Ci g^-1Spin and parity:
(nuclear angular momentum)(4.5)

Radioactive Decay

Half-life T_½ = 2.0(2) s.

Decay mode	Daughter	Probability	Decay energy
β^-	⁹⁸Zr	86.6 %	9.8 MeV
Iso	⁹⁸Y	10 %
β^-, n	⁹⁷Zr	3.4 %

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
⁹⁸Y		548(2) ms	(0)-
^98m1Y	170.74(6) keV	0.62(8) μs	(2)-
^98m3Y	496.19(15) keV	7.6(4) μs	(2-)
^98m4Y	1181.1(4) keV	0.83(10) μs	(8-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 98) with Yttrium-98m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 59	Isobar A = 98
33	⁹²As
34	⁹³Se
35	⁹⁴Br	⁹⁸Br
36	⁹⁵Kr	⁹⁸Kr
37	⁹⁶Rb	⁹⁸Rb
38	⁹⁷Sr	⁹⁸Sr
39	⁹⁸Y	⁹⁸Y
40	⁹⁹Zr	⁹⁸Zr
41	¹⁰⁰Nb	⁹⁸Nb
42	¹⁰¹Mo	⁹⁸Mo
43	¹⁰²Tc	⁹⁸Tc
44	¹⁰³Ru	⁹⁸Ru
45	¹⁰⁴Rh	⁹⁸Rh
46	¹⁰⁵Pd	⁹⁸Pd
47	¹⁰⁶Ag	⁹⁸Ag
48	¹⁰⁷Cd	⁹⁸Cd
49	¹⁰⁸In	⁹⁸In
50	¹⁰⁹Sn
51	¹¹⁰Sb
52	¹¹¹Te
53	¹¹²I
54	¹¹³Xe
55	¹¹⁴Cs
56	¹¹⁵Ba
57	¹¹⁶La