Isotopes of oxygen

Isotopes of oxygen

Late in a massive star's life, Oxygen-16 concentrates in the O-shell, Oxygen-17 in the H-shell and Oxygen-18 in the He-shell.

Stable isotopes of oxygen include Oxygen-16, Oxygen-17 and Oxygen-18 while radioisotopes of oxygen are Oxygen-12, Oxygen-13, Oxygen-14, Oxygen-15, Oxygen-19, Oxygen-20, Oxygen-21, Oxygen-22, Oxygen-23, Oxygen-24 and Oxygen-26.

OXYGEN-13

Oxygen-13 is an unstable isotope of oxygen.  It consists of 8 protons, 5 neutrons and 8 electrons.  It has a spin of 3/2-, and a half life of 8.58 milliseconds.  Its atomic mass is 13.0248 Da.  It decays to nitrogen-13 by electron capture, and has a decay energy of 17.765 MeV. It's parent nuclide is fluorine-14.

OXYGEN-15

Oxygen-15 is an isotope of oxygen, frequently used in positron emission tomography or PET experiments.  It has 8 protons, 7 neutrons, and 8 electrons.  The total atomic mass is 15.0030654 amu. It has a half life of 122.24 seconds.  Oxygen-15 is synthesized through deuteron bombardment of nitrogen-14 using a cyclotron.

REFERENCES USED:

http://en.wikipedia.org/wiki/Isotopes_of_oxygen