Table 1 Systematic and statistical contributions to the uncertainty in the determination of the EA of 35Cl

From: Enhanced sensitivity for electron affinity measurements of rare elements

Contribution

Statistical uncertainty

Systematic uncertainty

 

Fit uncertainty

14 μeV

42 μeV

in EA

Laser frequency

(≈100 MHz

10 MHz

on frequency)

 

≈0.41 μeV

0.04 μeV

in EA

Ion beam energy

 

(6.1 eV

on beam energy)

  

2.3 μeV

in EA

Offset switch timings

 

(0.1 eV

on beam energy)

  

0.04 μeV

in EA

Hyperfine structure

 

4.2 μeV

in EA

Non-relativistic treatment of anion velocities

 

4 10−5μeV

in EA