19-K-40
- Atomic Mass: 39.9639987 ± 0.0000003 amu
- Excess Mass: -33535.016 ± 0.271 keV
- Binding Energy: 341523.214 ± 0.276 keV
- Beta Decay Energy: B- 1311.093 ± 0.118 keV
- Spin: 4-
- Half life: 1.277E+9 Y ( 0.6265 % )
- Mode of decay: Electron capture to Ar-40
- Branch ratio: 10.72
- Decay energy: 1.505 MeV
- Mode of decay: Beta to Ca-40
- Branch ratio: 89.28
- Decay energy: 1.311 MeV
Total Cross Section
- at 0.0253 eV = 37.54 b
- Maxwell avg. at 0.0253 eV = 33.76 b
- at 14 MeV = 2.046 b
- Fission spectrum avg. = 2.862 b
- g-factor = 1.0147
Elastic Scattering Cross Section
- at 0.0253 eV = 2.751 b
- Maxwell avg. at 0.0253 eV = 2.751 b
- at 14 MeV = 977.4 mb
- Fission spectrum avg. = 2.311 b
- g-factor = 1.1284
Total Inelastic Cross Section
- at 14 MeV = 289.9 mb
- Fission spectrum avg. = 411.7 mb
(n,2n) Cross Section
- at 14 MeV = 225.5 mb
- Fission spectrum avg. = 537.6 micro barn
(n,na) Cross Section
- at 14 MeV = 112.8 mb
- Fission spectrum avg. = 34.59 micro barn
(n,np) Cross Section
- at 14 MeV = 190.0 mb
- Fission spectrum avg. = 232.1 micro barn
Radiative Capture Cross Section
- at 0.0253 eV = 30.00 b
- Maxwell avg. at 0.0253 eV = 26.59 b
- Resonance integral = 13.45 b
- at 14 MeV = 4.123 micro barn
- Fission spectrum avg. = 1.546 mb
- g-factor = 1.0000
(n,p) Cross Section
- at 0.0253 eV = 4.400 b
- Maxwell avg. at 0.0253 eV = 3.853 b
- Resonance integral = 1.481 b
- at 14 MeV = 108.5 mb
- Fission spectrum avg. = 27.41 mb
- g-factor = 0.9882
(n,alpha) Cross Section
- at 0.0253 eV = 390.0 mb
- Maxwell avg. at 0.0253 eV = 359.5 mb
- Resonance integral = 1.307 b
- at 14 MeV = 142.4 mb
- Fission spectrum avg. = 109.9 mb
- g-factor = 1.0400
Element K