positrons - 2024 ACF Fall - Buzzpoints App

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

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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


Binghamton A	Syracuse	0	10	0	10
U of Rochester A	Cornell B	0	10	0	10
Cornell D	Cornell E	10	10	10	30
Cornell G	U of Rochester B	10	10	0	20
Cornell A	ESF	0	10	0	10
Penn State	Cornell F	10	10	0	20
Binghamton B	RIT A	10	10	0	20
Cornell C	RIT B	10	10	0	20
West Virginia A (UG)	CWRU A (UG)	10	10	10	30
CWRU B (DII)	Miami A (UG)	10	10	0	20
Jefferson County Scholars (DII)	Michigan C	10	10	0	20
Michigan A (UG)	Michigan B (UG)	10	10	0	20
Michigan State B	Michigan State A	0	10	0	10
Ohio State A (UG)	CWRU C (UG)	10	10	0	20
Miami B (UG)	Ohio State B (DII)	10	10	10	30
West Virginia B (UG)	Michigan D (UG)	0	10	0	10
UW Gluttony	Alberta	0	10	0	10
Arizona State A	UW Lust	10	10	0	20
Arizona State B	UW Envy	10	10	0	20
Boise State	UBC A	10	10	0	20
UW Sloth	UBC B	10	10	0	20
UW Pride	UW Chastity	10	10	0	20
Tennessee A	Auburn A	10	10	10	30
Tennessee B	Clemson A	0	10	0	10
Georgia A	Clemson B	0	10	0	10
Emory A	Georgia Tech B	0	10	0	10
Emory Oxford	Vanderbilt A	10	10	0	20
Furman	Alabama A	0	10	0	10
South Carolina A	Georgia Tech A	0	10	0	10
Georgia Tech C	Auburn B	0	10	0	10
Georgia Tech D	Georgia Tech E	0	10	0	10
South Carolina B	Mississippi State A	10	10	0	20
Southern	Belmont	0	10	0	10
James Madison A	Liberty B	0	10	0	10
Appalachian State A	James Madison B	0	10	0	10
Liberty A	Duke A	10	10	0	20
William & Mary	Liberty C	10	10	0	20
NC State	UNC D	0	10	0	10
Virginia Tech A	Tusculum	0	10	0	10
VCU	UNC B	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
UNC C	UNC A	10	10	0	20
Duke B	Virginia Tech B	10	10	0	20
UCLA C	Claremont B	0	10	10	20
UCLA D	Claremont C	10	10	0	20
UCLA B	UCLA E	0	10	0	10
UCSD	Claremont A	10	10	10	30
UCLA A	USC	10	10	0	20
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
Chicago B	Purdue B	10	10	0	20
Northwestern A	Illinois A	10	10	0	20
Illinois B	Indiana	10	10	0	20
Illinois C	Illinois D	10	10	0	20
Iowa A	Chicago A	0	10	0	10
WashU B	Iowa B	10	10	0	20
Notre Dame C	Notre Dame A	0	10	0	10
Purdue A	Notre Dame B	10	10	10	30
WashU A	Purdue C	10	10	0	20