About   |   More   |   Search
ChemLin Logo

Oxygen-11

Properties and data of the isotope 11O.


Contents

 

Oxygen-11 isotope

Oxygen-11 is a radioisotope of the chemical element oxygen, which has 3 neutrons in its atomic nucleus in addition to the element-specific 8 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 11. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of 11O is exclusively for academic purposes.

The discovery of the extremely proton-rich isotope 11O was first reported in 2019. It was produced by a 2-neutron knockout reaction with oxygen-13 (13O) [1].

See also: list of Oxygen isotopes.

 

General data

Name of the isotope:Oxygen-11; O-11Symbol:11O or 118OMass number A:11 (= number of nucleons)Atomic number Z:8 (= number of protons)Neutrons N:3Isotopic mass:11.05125(6) u (atomic weight of Oxygen-11)Nuclide mass:11.0468614 u (calculated nuclear mass without electrons)Mass excess:47.73907 MeVMass defect:0.037345004000001 u (per nucleus)Nuclear binding energy:34.78664716 MeV (per nucleus)
3.16242247 MeV (average binding energy per nucleon)
Half-life:198(12) ysDecay constant λ:3.500743336161 × 10+21 s-1Specific activity α:1.916542680440 × 10+44 Bq g-1
5.179845082272 × 10+33 Ci g-1
Spin and parity:
(nuclear angular momentum)
(3/2-)Mirror nucleus:Lithium-11Year of discovery:2018

 

Radioactive Decay

Half-life T½ = 198(12) ys respectively 198 × 10-24 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
2p9C100 %

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 3) and isobaric (same nucleon number A = 11) with Oxygen-11. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 3Isobar A = 11
14H
25He
36Li11Li
47Be11Be
58B11B
69C11C
710N11N
811O11O

 

External data and identifiers

Adopted Levels, Gammas:NuDat 11O

 

Literature and References

[1] - T. B. Webb et al.:
First Observation of Unbound 11O, the Mirror of the Halo Nucleus 11Li.
In: Physical Review Letters, (2019), DOI 10.1103/PhysRevLett.122.122501.

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2024-10-03


© 1996 - 2025 ChemLin