Strontium-98

Properties and data of the isotope ⁹⁸Sr.

Contents

General data

Name of the isotope:Strontium-98; Sr-98Symbol:⁹⁸Sr or 9838SrMass number A:98 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:60Isotopic mass:97.928692(3) u (atomic weight of Strontium-98)Nuclide mass:97.9078468 u (calculated nuclear mass without electrons)Mass excess:-66.42297 MeVMass defect:0.888554176 u (per nucleus)Nuclear binding energy:827.68288362 MeV (per nucleus)
8.44574371 MeV (average binding energy per nucleon)Separation energy:S_N = 5.913(5) MeV (first neutron)
S_P = 15.193(4) MeV (first proton)Half-life:653(2) msDecay constant λ:1.0614811340887 s^-1Specific activity α:6.590091659430 × 10⁺²¹ Bq g^-1
178110585390.02 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.4377(214) femtometer fmYear of discovery:1971

Radioactive Decay

Half-life T_½ = 653(2) ms respectively 6.53 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁸Y	99.75 %	5.872(9) MeV
β^-, n	⁹⁷Y	0.25(5) %	1.627(7) MeV

Parent Nuclides

Direct parent isotope is: ⁹⁸Rb.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 60) and isobaric (same nucleon number A = 98) with Strontium-98. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 60	Isobar A = 98
34	⁹⁴Se
35	⁹⁵Br	⁹⁸Br
36	⁹⁶Kr	⁹⁸Kr
37	⁹⁷Rb	⁹⁸Rb
38	⁹⁸Sr	⁹⁸Sr
39	⁹⁹Y	⁹⁸Y
40	¹⁰⁰Zr	⁹⁸Zr
41	¹⁰¹Nb	⁹⁸Nb
42	¹⁰²Mo	⁹⁸Mo
43	¹⁰³Tc	⁹⁸Tc
44	¹⁰⁴Ru	⁹⁸Ru
45	¹⁰⁵Rh	⁹⁸Rh
46	¹⁰⁶Pd	⁹⁸Pd
47	¹⁰⁷Ag	⁹⁸Ag
48	¹⁰⁸Cd	⁹⁸Cd
49	¹⁰⁹In	⁹⁸In
50	¹¹⁰Sn
51	¹¹¹Sb
52	¹¹²Te
53	¹¹³I
54	¹¹⁴Xe
55	¹¹⁵Cs
56	¹¹⁶Ba
57	¹¹⁷La