Strontium-80

Properties and data of the isotope ⁸⁰Sr.

Contents

General data

Name of the isotope:Strontium-80; Sr-80Symbol:⁸⁰Sr or 8038SrMass number A:80 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:42Isotopic mass:79.924518(4) u (atomic weight of Strontium-80)Nuclide mass:79.9036728 u (calculated nuclear mass without electrons)Mass excess:-70.31103 MeVMass defect:0.73675968799999 u (per nucleus)Nuclear binding energy:686.28722881 MeV (per nucleus)
8.57859036 MeV (average binding energy per nucleon)Separation energy:S_N = 12.906(9) MeV (first neutron)
S_P = 6.797(4) MeV (first proton)Half-life:106.3(15) minDecay constant λ:0.00010867782699278 s^-1Specific activity α:8.284470664586 × 10⁺¹⁷ Bq g^-1
22390461.25564 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.2562(37) femtometer fmYear of discovery:1961

Radioactive Decay

Half-life T_½ = 106.3(15) min (minutes) respectively 6.378 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁸⁰Rb	100 %	1.864(4) MeV

Parent Nuclides

Direct parent isotope is: ⁸⁰Y.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 42) and isobaric (same nucleon number A = 80) with Strontium-80. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 42	Isobar A = 80
23	⁶⁵V
24	⁶⁶Cr
25	⁶⁷Mn
26	⁶⁸Fe
27	⁶⁹Co
28	⁷⁰Ni	⁸⁰Ni
29	⁷¹Cu	⁸⁰Cu
30	⁷²Zn	⁸⁰Zn
31	⁷³Ga	⁸⁰Ga
32	⁷⁴Ge	⁸⁰Ge
33	⁷⁵As	⁸⁰As
34	⁷⁶Se	⁸⁰Se
35	⁷⁷Br	⁸⁰Br
36	⁷⁸Kr	⁸⁰Kr
37	⁷⁹Rb	⁸⁰Rb
38	⁸⁰Sr	⁸⁰Sr
39	⁸¹Y	⁸⁰Y
40	⁸²Zr	⁸⁰Zr
41	⁸³Nb
42	⁸⁴Mo
43	⁸⁵Tc
44	⁸⁶Ru