Strontium-97

Properties and data of the isotope ⁹⁷Sr.

Contents

General data

Name of the isotope:Strontium-97; Sr-97Symbol:⁹⁷Sr or 9738SrMass number A:97 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:59Isotopic mass:96.926375(4) u (atomic weight of Strontium-97)Nuclide mass:96.9055298 u (calculated nuclear mass without electrons)Mass excess:-68.58125 MeVMass defect:0.88220626 u (per nucleus)Nuclear binding energy:821.76983795 MeV (per nucleus)
8.471854 MeV (average binding energy per nucleon)Separation energy:S_N = 3.729(9) MeV (first neutron)
S_P = 14.516(5) MeV (first proton)Half-life:429(5) msDecay constant λ:1.6157276936129 s^-1Specific activity α:1.013556225233 × 10⁺²² Bq g^-1
273934114927.86 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μ_N) = -0.498(2)Nuclear g-factor:g_l = -0.996Charge radius:4.3625(135) femtometer fmYear of discovery:1978

Radioactive Decay

Half-life T_½ = 429(5) ms respectively 4.29 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁷Y	99.95 %	7.540(8) MeV
β^-, n	⁹⁶Y	0.05 %	1.683(7)

Parent Nuclides

Direct parent isotope is: ⁹⁷Rb.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^97m1Sr	308.13(11) keV	169(9) ns	7/2+
^97m2Sr	830.83(23) keV	395 ns	(9/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 97) with Strontium-97. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 59	Isobar A = 97
33	⁹²As
34	⁹³Se
35	⁹⁴Br	⁹⁷Br
36	⁹⁵Kr	⁹⁷Kr
37	⁹⁶Rb	⁹⁷Rb
38	⁹⁷Sr	⁹⁷Sr
39	⁹⁸Y	⁹⁷Y
40	⁹⁹Zr	⁹⁷Zr
41	¹⁰⁰Nb	⁹⁷Nb
42	¹⁰¹Mo	⁹⁷Mo
43	¹⁰²Tc	⁹⁷Tc
44	¹⁰³Ru	⁹⁷Ru
45	¹⁰⁴Rh	⁹⁷Rh
46	¹⁰⁵Pd	⁹⁷Pd
47	¹⁰⁶Ag	⁹⁷Ag
48	¹⁰⁷Cd	⁹⁷Cd
49	¹⁰⁸In	⁹⁷In
50	¹⁰⁹Sn
51	¹¹⁰Sb
52	¹¹¹Te
53	¹¹²I
54	¹¹³Xe
55	¹¹⁴Cs
56	¹¹⁵Ba
57	¹¹⁶La