Strontium-101
Properties and data of the isotope 101Sr.
See also: list of Strontium isotopes.
General data
Name of the isotope:Strontium-101; Sr-101Symbol:101Sr or 10138SrMass number A:101 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:63Isotopic mass:100.940606(9) u (atomic weight of Strontium-101)Nuclide mass:100.9197608 u (calculated nuclear mass without electrons)Mass excess:-55.32515 MeVMass defect:0.902634924 u (per nucleus)Nuclear binding energy:840.7990159 MeV (per nucleus)
8.32474273 MeV (average binding energy per nucleon)Separation energy:SN = 3.575(11) MeV (first neutron)
SP = 16.367(21) MeV (first proton)Half-life:118(3) msDecay constant λ:5.8741286488131 s-1Specific activity α:3.537483015254 × 10+22 Bq g-1
956076490609.24 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1983
Radioactive Decay
Half-life T½ = 118(3) ms respectively 1.18 × 10-1 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 101Y | 97.63 % | 9.736(11) MeV | |
β-, n | 100Y | 2.37(14) % | 3.931(14) MeV | |
Parent Nuclides
Direct parent isotope is: 101Rb.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 63) and isobaric (same nucleon number A = 101) with Strontium-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 63 | Isobar A = 101 |
35 | 98Br | |
36 | 99Kr | 101Kr |
37 | 100Rb | 101Rb |
38 | 101Sr | 101Sr |
39 | 102Y | 101Y |
40 | 103Zr | 101Zr |
41 | 104Nb | 101Nb |
42 | 105Mo | 101Mo |
43 | 106Tc | 101Tc |
44 | 107Ru | 101Ru |
45 | 108Rh | 101Rh |
46 | 109Pd | 101Pd |
47 | 110Ag | 101Ag |
48 | 111Cd | 101Cd |
49 | 112In | 101In |
50 | 113Sn | 101Sn |
51 | 114Sb | |
52 | 115Te | |
53 | 116I | |
54 | 117Xe | |
55 | 118Cs | |
56 | 119Ba | |
57 | 120La | |
58 | 121Ce | |
59 | 122Pr | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/strontium-101
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