ENSDF Decay Data in the MIRD
(Medical Internal Radiation Dose) Format
for 40K


Halflife = 1.248E+9 YearsFeb-2017
Decay Modes: EC+β+, β-




β+ 11.00×10-051.973×10-01*1.97×10-06
γ±2.00×10-055.110×10-01 1.02×10-05
γ 11.07×10-011.461 1.56×10-01
K X-ray5.86×10-032.958×10-03*1.73×10-05
K X-ray2.96×10-032.956×10-03*8.74×10-06
K X-ray9.51×10-043.190×10-03*3.03×10-06
β- 18.93×10-015.602×10-01*5.00×10-01

Listed X, γ, and γ± Radiations1.56×10-01
Listed β, ce, and Auger Radiations5.00×10-01
Listed Radiations6.56×10-01

*   Average Energy (MeV).

Argon-40 Daughter, yield 1.07×10-01, is stable.
Calcium-40 Daughter, yield 8.93×10-01, is stable.

This program and the accompanying data base have been produced by the National Nuclear Data Center located at the Brookhaven National Laboratory, Upton, N.Y., USA, with funding from the U.S. Department of Energy. Neither the BNL nor the USDOE make any warranty or assume any legal responsibility for the contents of the data base.
Generated at NNDC by MIRD Thu Jun 4 12:56:49 2020