Question
Two photons are released when these particles annihilate with an electron. For 10 points each:
[10m] Name these particles which are released along with an electron neutrino in beta plus decay.
ANSWER: positrons [prompt on anti-electrons]
[10e] Positron emission occurs when beta plus decay occurs inside this object. This center of the atom contains protons and neutrons.
ANSWER: nucleus [or nuclei]
[10h] Positrons are also formed in this process, in which a boson becomes a particle and its antiparticle. The opposite of annihilation, this process is represented by a squiggly line splitting into two straight lines on a Feynman diagram.
ANSWER: pair production
<Physics>
Summary
| 2024 ACF Fall at Cornell | fall | Y | 8 | 17.50 | 100% | 63% | 13% |
| 2024 ACF Fall at Ohio State | fall | Y | 8 | 20.00 | 100% | 75% | 25% |
| 2024 ACF Fall at Washington | fall | Y | 6 | 18.33 | 100% | 83% | 0% |
| 2024 ACF Fall at Georgia | fall | Y | 11 | 13.64 | 100% | 27% | 9% |
| 2024 ACF Fall at North Carolina | fall | Y | 10 | 28.00 | 160% | 120% | 0% |
| 2024 ACF Fall at Claremont Colleges | fall | Y | 5 | 20.00 | 100% | 60% | 40% |
| 2024 ACF Fall at Rutgers | fall | Y | 8 | 20.00 | 100% | 75% | 25% |
| 2024 ACF Fall at Illinois | fall | Y | 9 | 18.89 | 100% | 78% | 11% |
Data
| Columbia A (UG) | Columbia J (DII) | 10 | 10 | 0 | 20 |
| Maryland A (DII) | Fordham A | 10 | 10 | 10 | 30 |
| Lehigh B (DII) | Lehigh A (UG) | 0 | 10 | 10 | 20 |
| Lehigh A (UG) | Rutgers B | 10 | 10 | 0 | 20 |
| Bard A (UG) | Maryland B (DII) | 0 | 10 | 0 | 10 |
| NYU A (UG) | Columbia B | 10 | 10 | 0 | 20 |
| NYU B | Rowan A (DII) | 10 | 10 | 0 | 20 |
| Penn B (DII) | Penn A (DII) | 10 | 10 | 0 | 20 |