Abstract
The absolute photoionisation cross section of the 113D Rydberg state of 4He has been measured over a range of frequencies very close to the ionisation threshold. The measurements are compared with a calculation of the cross section performed using the quantum defect method, and the agreement is found to be within the +or-20% uncertainty associated with the measurements.
| Original language | English |
|---|---|
| Article number | 003 |
| Pages (from-to) | L121-L125 |
| Journal | Journal of Physics B: Atomic and Molecular Physics |
| Volume | 20 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1987 |