Strontium-95

Properties and data of the isotope ⁹⁵Sr.

Contents

General data

Name of the isotope:Strontium-95; Sr-95Symbol:⁹⁵Sr or 9538SrMass number A:95 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:57Isotopic mass:94.919356(6) u (atomic weight of Strontium-95)Nuclide mass:94.8985108 u (calculated nuclear mass without electrons)Mass excess:-75.1194 MeVMass defect:0.87189542800002 u (per nucleus)Nuclear binding energy:812.16535981 MeV (per nucleus)
8.54910905 MeV (average binding energy per nucleon)Separation energy:S_N = 4.345(6) MeV (first neutron)
S_P = 13.846(6) MeV (first proton)Half-life:23.90(14) sDecay constant λ:0.029001974082006 s^-1Specific activity α:1.858020990830 × 10⁺²⁰ Bq g^-1
5021678353.5962 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μ_N) = -0.537(2)Nuclear g-factor:g_l = -1.074Charge radius:4.3305(102) femtometer fmYear of discovery:1961

Radioactive Decay

Half-life T_½ = 23.90(14) s respectively 2.390 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁵Y	100%	6.089(7) MeV

Parent Nuclides

Direct parent isotope is: ⁹⁵Rb.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 57) and isobaric (same nucleon number A = 95) with Strontium-95. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 57	Isobar A = 95
32	⁸⁹Ge
33	⁹⁰As
34	⁹¹Se	⁹⁵Se
35	⁹²Br	⁹⁵Br
36	⁹³Kr	⁹⁵Kr
37	⁹⁴Rb	⁹⁵Rb
38	⁹⁵Sr	⁹⁵Sr
39	⁹⁶Y	⁹⁵Y
40	⁹⁷Zr	⁹⁵Zr
41	⁹⁸Nb	⁹⁵Nb
42	⁹⁹Mo	⁹⁵Mo
43	¹⁰⁰Tc	⁹⁵Tc
44	¹⁰¹Ru	⁹⁵Ru
45	¹⁰²Rh	⁹⁵Rh
46	¹⁰³Pd	⁹⁵Pd
47	¹⁰⁴Ag	⁹⁵Ag
48	¹⁰⁵Cd	⁹⁵Cd
49	¹⁰⁶In
50	¹⁰⁷Sn
51	¹⁰⁸Sb
52	¹⁰⁹Te
53	¹¹⁰I
54	¹¹¹Xe
55	¹¹²Cs