Question
Nozières and De Dominicis developed a theory of these singularities involving a competition between an “orthogonality catastrophe” and an exciton effect predicted by Mahan. For 10 points each:
[10m] Name these features displayed by the absorption and emission spectra of metals. One of these features corresponds to a jump in absorbance just above the K-shell energy.
ANSWER: edge singularities [or absorption edges; accept K-edge; accept, but DO NOT REVEAL, Fermi edge]
[10e] One absorption edge occurs at an energy named for this scientist, which is the energy of the highest occupied state in a metal at zero temperature.
ANSWER: Enrico Fermi [accept Fermi edge; accept Fermi level; accept Fermi energy]
[10h] Fermi edge singularities are used to calibrate this technique for metallic samples. This surface-analysis technique, which was pioneered by Siegbahn, is somewhat controversially calibrated using “adventitious carbon” for organic samples.
ANSWER: X-ray photoelectron spectroscopy [or XPS; prompt on photoelectron spectroscopy or PES]
<DC, Physics>
Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2024 Chicago Open | 07/28/2024 | Y | 15 | 10.67 | 80% | 7% | 20% |