JET TRANSFER  Rapid transport of radionuclides using a gas jet, e.g.,  a helium jet . See gas jet .

JUNCTION, P-N  Of a semiconductor detector, the intermediary zone between a p-type and n-type semiconductor.

<JUNCTION DIVIDE DETECTOR >

K-CAPTURE  See K-electron capture .

KERMA  K)inetic e)nergy r)eleased in ma)terial.

ko FACTOR  In activation analysis , the ratio of the product of atomic weight, isotopic abundance of activated nuclide, abundance of gamma-ray being measured, and the 2200 m/s cross section  for an analyte element and a monitor nuclide. Its use in the ko method enables independence from irradiation conditions (thermal-to-epithermal ratio) and from counting conditions. The factor can be determined experimentally or from tabulated constants. KE.

K-ELECTRON CAPTURE  Radioactive decay  of a nucleus by electron capture  in which the electron  captured by the nucleus was originally in the K-shell (1s atomic orbital).  

keV  kiloelectronvolt; 103 electronvolts.

KRYPTONATES  A solid compound or metal into which 85Kr has been incorporated by ion bombardment or thermal