Bismuth-195m
Properties and data of the isotope 195mBi.
See also: list of Bismuth isotopes.
General data
Name of the isotope:Bismuth-195m; Bi-195mSymbol:195mBi or 195m83BiMass number A:195 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:112Isotopic mass:194.980649(6) u (atomic weight of Bismuth-195m)
Excitation energy: 401(7) keVNuclide mass:194.9351221 u (calculated nuclear mass without electrons)Mass excess:-18.02534 MeVMass defect:1.639299248 u (per nucleus)Nuclear binding energy:1526.99741372 MeV (per nucleus)
7.83075597 MeV (average binding energy per nucleon)Half-life:87(1) sDecay constant λ:0.0079672089719534 s-1Specific activity α:2.473178076786 × 10+19 Bq g-1
668426507.23954 Ci g-1Spin and parity:
(nuclear angular momentum)(1/2+)
Radioactive Decay
Half-life T½ = 87(1) s respectively 8.7 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
α | 191Tl | 33(17) % | | |
EC/β+ | 195Pb | 67(17) % | | |
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 |
---|
195Bi | | 183(4) s | (9/2-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 112) and isobaric (same nucleon number A = 195) with Bismuth-195m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 112 | Isobar A = 195 |
70 | 182Yb | |
71 | 183Lu | |
72 | 184Hf | |
73 | 185Ta | |
74 | 186W | 195W |
75 | 187Re | 195Re |
76 | 188Os | 195Os |
77 | 189Ir | 195Ir |
78 | 190Pt | 195Pt |
79 | 191Au | 195Au |
80 | 192Hg | 195Hg |
81 | 193Tl | 195Tl |
82 | 194Pb | 195Pb |
83 | 195Bi | 195Bi |
84 | 196Po | 195Po |
85 | 197At | 195At |
86 | 198Rn | 195Rn |
87 | 199Fr | |
External data and identifiers
Last update: 2020-10-23
Perma link: https://www.chemlin.org/isotope/bismuth-195m
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