Technetium-115
Properties and data of the isotope 115Tc.
See also: List of individual Technetium isotopes (and general data sources).
General data
Name of the isotope:Technetium-115; Tc-115Symbol:115Tc or 11543TcMass number A:115 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:72Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.6744186046512 (= neutron-proton ratio)Neutron excess (N-Z):29Isotopic mass:114.93954(85) u (atomic weight of Technetium-115)Nuclide mass:114.9159522 u (calculated nuclear mass without electrons)Mass excess:-56.31813 MeVMass defect:1.020810328 u (per nucleus)Nuclear binding energy:950.87869567 MeV (per nucleus)
8.2685104 MeV (average binding energy per nucleon)Separation energy:SN = 5.79(90) MeV MeV (first neutron)
SP = 13.80(84) MeV MeV (first proton)Half-life:78(2) msDecay constant λ:8.8865023148711 s-1Specific activity α:4.694365674763 × 10+22 Bq g-1
1268747479665.9 Ci g-1Spin and parity:
(nuclear angular momentum)Year of discovery:1994
Radioactive Decay
Half-life T½ = 78(2) ms respectively 7.8 × 10-2 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 115Ru | | 9.87(79) MeV | |
| β-, n | 114Ru | ? | 5.83(79) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 72) and isobaric (same nucleon number A = 115) with Technetium-115. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 72 | Isobar A = 115 |
|---|
| 40 | 112Zr | |
| 41 | 113Nb | 115Nb |
| 42 | 114Mo | 115Mo |
| 43 | 115Tc | 115Tc |
| 44 | 116Ru | 115Ru |
| 45 | 117Rh | 115Rh |
| 46 | 118Pd | 115Pd |
| 47 | 119Ag | 115Ag |
| 48 | 120Cd | 115Cd |
| 49 | 121In | 115In |
| 50 | 122Sn | 115Sn |
| 51 | 123Sb | 115Sb |
| 52 | 124Te | 115Te |
| 53 | 125I | 115I |
| 54 | 126Xe | 115Xe |
| 55 | 127Cs | 115Cs |
| 56 | 128Ba | 115Ba |
| 57 | 129La | |
| 58 | 130Ce | |
| 59 | 131Pr | |
| 60 | 132Nd | |
| 61 | 133Pm | |
| 62 | 134Sm | |
| 63 | 135Eu | |
| 64 | 136Gd | |
| 65 | 137Tb | |
| 66 | 138Dy | |
External data and identifiers
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/technetium-115
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