Zirconium-98

Properties and data of the isotope ⁹⁸Zr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Zirconium-98; Zr-98Symbol:⁹⁸Zr or 9840ZrMass number A:98 (= number of nucleons)Atomic number Z:40 (= number of protons)Neutrons N:58Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.45 (= neutron-proton ratio)Neutron excess (N-Z):18Isotopic mass:97.91273(9) u (atomic weight of Zirconium-98)Nuclide mass:97.8907878 u (calculated nuclear mass without electrons)Mass excess:-81.29148 MeVMass defect:0.902836408 u (per nucleus)Nuclear binding energy:840.98669703 MeV (per nucleus)
8.58149691 MeV (average binding energy per nucleon)Separation energy:S_N = 6.415(8) MeV (first neutron)
S_P = 12.454(11) MeV (first proton)Half-life:30.7(4) sDecay constant λ:0.022578084057327 s^-1Specific activity α:1.401736108667 × 10⁺²⁰ Bq g^-1
3788475969.3708 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.4012(164) femtometer fmYear of discovery:1967

Radioactive Decay

Half-life T_½ = 30.7(4) s respectively 3.07 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁸Nb	100 %	2.238(10) MeV

Parent Nuclides

Direct parent isotopes are: ⁹⁸Y, ⁹⁹Y, ²⁵²Cf, ²⁴⁸Cm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 58) and isobaric (same nucleon number A = 98) with Zirconium-98. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 58	Isobar A = 98
32	⁹⁰Ge
33	⁹¹As
34	⁹²Se
35	⁹³Br	⁹⁸Br
36	⁹⁴Kr	⁹⁸Kr
37	⁹⁵Rb	⁹⁸Rb
38	⁹⁶Sr	⁹⁸Sr
39	⁹⁷Y	⁹⁸Y
40	⁹⁸Zr	⁹⁸Zr
41	⁹⁹Nb	⁹⁸Nb
42	¹⁰⁰Mo	⁹⁸Mo
43	¹⁰¹Tc	⁹⁸Tc
44	¹⁰²Ru	⁹⁸Ru
45	¹⁰³Rh	⁹⁸Rh
46	¹⁰⁴Pd	⁹⁸Pd
47	¹⁰⁵Ag	⁹⁸Ag
48	¹⁰⁶Cd	⁹⁸Cd
49	¹⁰⁷In	⁹⁸In
50	¹⁰⁸Sn	⁹⁸Sn
51	¹⁰⁹Sb
52	¹¹⁰Te
53	¹¹¹I
54	¹¹²Xe
55	¹¹³Cs
56	¹¹⁴Ba