Strontium-93

Properties and data of the isotope ⁹³Sr.

Contents

General data

Name of the isotope:Strontium-93; Sr-93Symbol:⁹³Sr or 9338SrMass number A:93 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:55Isotopic mass:92.914024(8) u (atomic weight of Strontium-93)Nuclide mass:92.8931788 u (calculated nuclear mass without electrons)Mass excess:-80.08613 MeVMass defect:0.85989759600001 u (per nucleus)Nuclear binding energy:800.98945129 MeV (per nucleus)
8.6127898 MeV (average binding energy per nucleon)Separation energy:S_N = 5.290(8) MeV (first neutron)
S_P = 12.602(10) MeV (first proton)Half-life:7.43(3) minDecay constant λ:0.0015548388976221 s^-1Specific activity α:1.017767266955 × 10⁺¹⁹ Bq g^-1
275072234.31227 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μ_N) = -0.793(2)Quadrupole moment Q:0.258(11) barn (100 fm²)Nuclear g-factor:g_l = -0.3172Charge radius:4.3026(75) femtometer fmYear of discovery:1959

Radioactive Decay

Half-life T_½ = 7.43(3) min (minutes) respectively 4.458 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹³Y	100%	4.141(12) MeV

Parent Nuclides

Direct parent isotope is: ⁹³Rb.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 55) and isobaric (same nucleon number A = 93) with Strontium-93. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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