Strontium-105
Properties and data of the isotope 105Sr.
See also: list of Strontium isotopes.
General data
Name of the isotope:Strontium-105; Sr-105Symbol:105Sr or 10538SrMass number A:105 (= number of nucleons)Atomic number Z:38 (= number of protons)Neutrons N:67Isotopic mass:104.95855(54) u (atomic weight of Strontium-105)Nuclide mass:104.9377048 u (calculated nuclear mass without electrons)Mass excess:-38.61043 MeVMass defect:0.919350588 u (per nucleus)Nuclear binding energy:856.36955662 MeV (per nucleus)
8.15590054 MeV (average binding energy per nucleon)Separation energy:SN = 2.58(58) MeV (first neutron)Half-life:39(5) msDecay constant λ:17.773004629742 s-1Specific activity α:1.02914939792 × 10+23 Bq g-1
2781484859267.6 Ci g-1Spin and parity:
(nuclear angular momentum)Year of discovery:1997
Radioactive Decay
Half-life T½ = 39(5) ms respectively 3.9 × 10-2 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 105Y | | 12.66 MeV | |
β-, n | 104Y | ? | 7.38(64) MeV | |
β-, 2n | 103Y | ? | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 67) and isobaric (same nucleon number A = 105) with Strontium-105. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 67 | Isobar A = 105 |
38 | 105Sr | 105Sr |
39 | 106Y | 105Y |
40 | 107Zr | 105Zr |
41 | 108Nb | 105Nb |
42 | 109Mo | 105Mo |
43 | 110Tc | 105Tc |
44 | 111Ru | 105Ru |
45 | 112Rh | 105Rh |
46 | 113Pd | 105Pd |
47 | 114Ag | 105Ag |
48 | 115Cd | 105Cd |
49 | 116In | 105In |
50 | 117Sn | 105Sn |
51 | 118Sb | 105Sb |
52 | 119Te | 105Te |
53 | 120I | |
54 | 121Xe | |
55 | 122Cs | |
56 | 123Ba | |
57 | 124La | |
58 | 125Ce | |
59 | 126Pr | |
60 | 127Nd | |
61 | 128Pm | |
62 | 129Sm | |
63 | 130Eu | |
External data and identifiers
Last update: 2020-10-14
Perma link: https://www.chemlin.org/isotope/strontium-105
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