Strontium-88

Properties and data of the isotope ⁸⁸Sr.

Contents

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

General data

Name of the isotope:Strontium-88; Sr-88Symbol:⁸⁸Sr or 8838SrMass number A:88 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:50Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3157894736842 (= neutron-proton ratio)Neutron excess (N-Z):12Isotopic mass:87.905613(8) u (atomic weight of Strontium-88)Nuclide mass:87.8847678 u (calculated nuclear mass without electrons)Mass excess:-87.92092 MeVMass defect:0.82498401599999 u (per nucleus)Nuclear binding energy:768.467661 MeV (per nucleus)
8.73258706 MeV (average binding energy per nucleon)Separation energy:S_N = 11.11287(1) MeV (first neutron)
S_P = 10.61280(1) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.2240(18) femtometer fmYear of discovery:1923

Parent Nuclides

Direct parent isotopes are: ⁸⁸Y, ⁸⁸Rb.

Occurrence

Comparison of the natural Strontium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Strontium Isotopic mixture	87.62 u	100 %
Isotope ⁸⁴Sr	83.913419(8) u	0.57 % [0.55 - 0.58 %]	stable	0+
Isotope ⁸⁶Sr	85.909261(8) u	9.87 % [9.75 - 9.99 %]	stable	0+
Isotope ⁸⁸Sr	87.905613(8) u	82.52 % [82.29 - 82.75 %]	stable	0+
Isotope ⁸⁷Sr	86.908877495(6) u	7.00(20) % [6.94 - 7.14 %]	stable	9/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 50) and isobaric (same nucleon number A = 88) with Strontium-88. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 50	Isobar A = 88
28	⁷⁸Ni
29	⁷⁹Cu
30	⁸⁰Zn
31	⁸¹Ga
32	⁸²Ge	⁸⁸Ge
33	⁸³As	⁸⁸As
34	⁸⁴Se	⁸⁸Se
35	⁸⁵Br	⁸⁸Br
36	⁸⁶Kr	⁸⁸Kr
37	⁸⁷Rb	⁸⁸Rb
38	⁸⁸Sr	⁸⁸Sr
39	⁸⁹Y	⁸⁸Y
40	⁹⁰Zr	⁸⁸Zr
41	⁹¹Nb	⁸⁸Nb
42	⁹²Mo	⁸⁸Mo
43	⁹³Tc	⁸⁸Tc
44	⁹⁴Ru	⁸⁸Ru
45	⁹⁵Rh
46	⁹⁶Pd
47	⁹⁷Ag
48	⁹⁸Cd
49	⁹⁹In
50	¹⁰⁰Sn