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>
Summary
| 2024 Chicago Open | 07/28/2024 | Y | 15 | 10.67 | 80% | 7% | 20% |
Data
| AMOGH QUIZ HACK? 英雄联盟 400 PPG 24 TUH | Read slowly: A A A A A A A A A A A A A A A Read quickly: A | 0 | 10 | 0 | 10 |
| Lying on a Mattress at Lou’s Apartment in Pilsen, Chicago | Charlotte's Moderately Successful Team | 0 | 10 | 0 | 10 |
| First Cause, First Cause, make me young! | when you look this good, you don’t have to know anything | 0 | 0 | 0 | 0 |
| I’ll take a quiet 10 / A handshake of CO (Chicago Open) | sticking out your guyot for the ridge push; you're so seafloor spread, you're so fracture zone | 0 | 0 | 0 | 0 |
| LMM's LLM MLM | Punished "Venom" BHSU | 0 | 10 | 10 | 20 |
| Berkeley Mafia and the Chicago Boy | Les Missourables | 0 | 10 | 0 | 10 |
| Lisan al-Quib | The Oldest Men in the World | 0 | 10 | 0 | 10 |
| Mindgoblin of Little Hobbes | var merchants | 0 | 10 | 0 | 10 |
| SAYYID QUTB, DRIVING THE LONGEST CAR YOU’VE EVER SEEN THROUGH TAHRIR SQUARE | NJTRANSit (and anwen, I guess) | 0 | 10 | 0 | 10 |
| Galvanized Square Steen and Eco-Friendly Wood Vermeer | NJTRANSit (and bobby, i guess) | 0 | 0 | 0 | 0 |
| We Need New Names | The Dyatlov Passement incident | 0 | 10 | 0 | 10 |
| BHSU B | The Empire Bikes Back | 10 | 10 | 10 | 30 |
| The Jeam Team | genAI this, genAI that, have you found your 真爱 yet | 0 | 10 | 10 | 20 |
| Are You There, Chat? It's Me, Margaret | There are buzzable clues everywhere for those with eyes to see | 0 | 10 | 0 | 10 |
| A Nervy Liberal Nanny Hence | it's the great pumpkinification objection, charlie brown | 0 | 10 | 0 | 10 |