Xenon-115
Properties and data of the isotope 115Xe.
See also: List of individual Xenon isotopes (and general data sources).
General data
Name of the isotope:Xenon-115; Xe-115Symbol:115Xe or 11554XeMass number A:115 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:61Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.1296296296296 (= neutron-proton ratio)Neutron excess (N-Z):7Isotopic mass:114.926294(13) u (atomic weight of Xenon-115)Nuclide mass:114.8966726 u (calculated nuclear mass without electrons)Mass excess:-68.6567 MeVMass defect:1.024817604 u (per nucleus)Nuclear binding energy:954.61144922 MeV (per nucleus)
8.30096912 MeV (average binding energy per nucleon)Separation energy:SN = 9.642(16) MeV (first neutron)
SP = 3.15(15) MeV (first proton)Half-life:18(4) sDecay constant λ:0.038508176697775 s-1Specific activity α:2.03422512573 × 10+20 Bq g-1
5497905745.2189 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2+)Year of discovery:1969
Radioactive Decay
Half-life T½ = 18(4) s respectively 1.8 × 101 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 115I | 99.65 % | 7.68(3) MeV | |
| β+, p | 114Te | 0.34(6) % | | |
| α | 111Te | 0.0003(1) % | 2,506(14) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 115) with Xenon-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 61 | Isobar A = 115 |
|---|
| 34 | 95Se | |
| 35 | 96Br | |
| 36 | 97Kr | |
| 37 | 98Rb | |
| 38 | 99Sr | |
| 39 | 100Y | |
| 40 | 101Zr | |
| 41 | 102Nb | 115Nb |
| 42 | 103Mo | 115Mo |
| 43 | 104Tc | 115Tc |
| 44 | 105Ru | 115Ru |
| 45 | 106Rh | 115Rh |
| 46 | 107Pd | 115Pd |
| 47 | 108Ag | 115Ag |
| 48 | 109Cd | 115Cd |
| 49 | 110In | 115In |
| 50 | 111Sn | 115Sn |
| 51 | 112Sb | 115Sb |
| 52 | 113Te | 115Te |
| 53 | 114I | 115I |
| 54 | 115Xe | 115Xe |
| 55 | 116Cs | 115Cs |
| 56 | 117Ba | 115Ba |
| 57 | 118La | |
| 58 | 119Ce | |
External data and identifiers
Last update: 2020-10-18
Perma link: https://www.chemlin.org/isotope/xenon-115
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