Strontium-76

Properties and data of the isotope ⁷⁶Sr.

Contents

General data

Name of the isotope:Strontium-76; Sr-76Symbol:⁷⁶Sr or 7638SrMass number A:76 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:38Isotopic mass:75.94176(4) u (atomic weight of Strontium-76)Nuclide mass:75.9209148 u (calculated nuclear mass without electrons)Mass excess:-54.25021 MeVMass defect:0.68485802399999 u (per nucleus)Nuclear binding energy:637.94114021 MeV (per nucleus)
8.39396237 MeV (average binding energy per nucleon)Separation energy:S_N = 15.70(22) MeV (first neutron)
S_P = 4.32(30) MeV (first proton)Half-life:7.89(7) sDecay constant λ:0.087851353683136 s^-1Specific activity α:7.054043021546 × 10⁺²⁰ Bq g^-1
19064981139.314 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1990

Radioactive Decay

Half-life T_½ = 7.89(7) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁷⁶Rb	< 100 %	6.23(30) MeV
EC, p	⁷⁵Kr	> 0 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 38) and isobaric (same nucleon number A = 76) with Strontium-76. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 38	Isobar A = 76
20	⁵⁸Ca
21	⁵⁹Sc
22	⁶⁰Ti
23	⁶¹V
24	⁶²Cr
25	⁶³Mn
26	⁶⁴Fe
27	⁶⁵Co	⁷⁶Co
28	⁶⁶Ni	⁷⁶Ni
29	⁶⁷Cu	⁷⁶Cu
30	⁶⁸Zn	⁷⁶Zn
31	⁶⁹Ga	⁷⁶Ga
32	⁷⁰Ge	⁷⁶Ge
33	⁷¹As	⁷⁶As
34	⁷²Se	⁷⁶Se
35	⁷³Br	⁷⁶Br
36	⁷⁴Kr	⁷⁶Kr
37	⁷⁵Rb	⁷⁶Rb
38	⁷⁶Sr	⁷⁶Sr
39	⁷⁷Y	⁷⁶Y
40	⁷⁸Zr