Landolt-Brnstein Group I
: Elementary Particles, Nuclei and Atoms
Volume 4 

Numerical Tables for Beta-Decay and Electron Capture 
Introductory material
1 
Introduction 1

2 
Formulae for beta-decay and electron capture 3

2.1	
Classification of beta-decays 3

2.2	
General formulae for beta-decay 3

2.3	
Special formulae for allowed, first forbidden, L-th non unique forbidden, and (L-1)-th-unique 9

forbidden beta-decays

2.4	
ft-value and integrated Fermi function 16

2.5	
General formulae for electron capture 17

2.6	
Special formulae for allowed and first forbidden electron captures 20

3	
Description of the tables, including the calculation methods 21

4	
Tables and diagrams 29

Table I.
 Relations between electron momentan total energies, kinetic energies and B rho30

values

Table II.
 Unscreened beta-decay Coulomb functions31

Table III.
 Ratio of screened to unscreened beta-decay Coulomb functions235

Table IV.
 Integrated statistical factor293

Diagrams I and II. Integrated Fermi-function divided by the integrated statistical factor 295

Diagrams III and IV. Screening corrections to the integrated Fermi-function 298

Table V.
 Coulomb functions of the bound orbital electron for electron capture301



5	
References 315




