Table 10 A summary of the optimized system parameters for the laser isotope separation of ¹⁶⁸Er.

Common parameters of laser system

Pulse width of the laser(s)

30 ns

Pulse repetition frequency

10 kHz

Laser beam diameter

50 mm

Photoionization process

Wavelength of laser-1

631.052 nm

Bandwidth

500 MHz

Intensity

800 W/cm² (average power = 4.7 W)

Wavelength of laser-2

586.912 nm

Bandwidth

500 MHz

Intensity

1000 W/cm² (average power = 5.9 W)

Wavelength of laser-3

566.003 nm

Bandwidth

500 MHz

Intensity

2400 W/cm² (average power = 14.1 W)

Source parameters

Evaporation temperature

1200° C

Full angle divergence of the atomic beam

30°

Number density in the laser-atom interaction region

7 × 10¹¹atoms/cm³

Results

Photoionization efficiency

0.2

Degree of enrichment

90%

Production rate

740 mg/hour (18 g/day)