nuclear cross section - 2025 ACF Winter

Question

You are building a nuclear reactor. Answer some questions about safety concerns you must address, for 10 points each.

[10m] Accounting for this parameter in nuclear reactions is essential, as it is a variable that helps determine yield. This parameter, an effective area measured in barns, is the probability that a reaction will occur.

ANSWER: nuclear cross section [prompt on sigma]

[10e] Your safety preparations are crucial because of this phenomenon, which consists of waves and particles that have enough energy to detach electrons. Geiger counters are often used to measure this phenomenon.

ANSWER: ionizing radiation

[10h] This SI unit quantifies the stochastic health risk of radiation exposure by converting the absorbed dose in grays into effective dose. One of these units is thought to predict a 5.5-percent probability of developing fatal cancer.

ANSWER: sieverts [prompt on Sv]

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Summary


California	Main	Y	5	16.00	80%	60%	20%
Canada	Main	Y	6	15.00	83%	33%	33%
Florida	Main	Y	13	16.15	77%	23%	62%
Great Lakes	Main	Y	6	13.33	83%	17%	33%
Lower Mid-Atlantic	Main	Y	7	17.14	86%	29%	57%
Midwest	Main	Y	8	17.50	100%	13%	63%
North	Main	Y	10	13.00	90%	20%	20%
Overflow	Main	Y	4	15.00	100%	25%	25%
Pacific Northwest	Main	Y	12	17.50	75%	33%	67%
Southeast	Main	Y	12	15.00	92%	8%	50%
UK	Main	Y	4	17.50	100%	25%	50%
2025 ACF Nationals	2025-08-09	Y	3	20.00	67%	33%	100%
2024 ARCADIA at UC Berkeley	04/19/2025	Y	4	12.50	100%	0%	25%

Data


Berkeley B	Berkeley F	0	10	0	10
Berkeley D	UCSC	0	0	0	0
Berkeley E	Berkeley C	10	10	0	20
Berkeley A	Stanford A	10	10	10	30
Stanford B	Stanford C	10	10	0	20
Claremont Scripps	UCSB	0	10	0	10
UCLA B	UCI	10	0	10	20
UCLA D	Claremont Pitzer	0	10	0	10
UCLA A	UCSD Vices and Virtues	0	10	0	10
UCSD Two Running Violet V Forms	UCSD What Hath God Wrought	10	10	0	20
USC	UCLA C	0	10	10	20
McGill A	Queen's B	0	10	0	10
McMaster B	Guelph B	0	10	10	20
McMaster C	Toronto G	0	0	0	0
UCF A	ERAU B	10	10	0	20
UF A	FIU	0	10	10	20
UF B	Melbourne B	0	10	10	20
ERAU A	UCF B	0	10	0	10
UF E	UF D	0	10	0	10
UF C	USF	0	0	0	0
Toronto B	Guelph A	0	10	10	20
Toronto D	Toronto E	10	10	10	30
Carleton	Toronto I	10	10	0	20
Toronto J	McGill C	0	10	10	20
Toronto F	Toronto K	10	10	0	20
Queen's A	Toronto Metropolitan	0	10	0	10
Queen's A	Toronto Metropolitan	0	10	10	20
Queen's A	Toronto Metropolitan	0	10	0	10
Queen's A	Toronto Metropolitan	0	10	10	20
Queen's A	Toronto Metropolitan	0	10	0	10
Queen's A	Toronto Metropolitan	0	10	10	20
Queen's A	Toronto Metropolitan	0	10	0	10
Queen's A	Toronto Metropolitan	0	10	10	20
Toronto H	Waterloo	0	10	10	20
McMaster A	Western Ontario	0	0	10	10
Toronto C	Toronto A	0	0	10	10
CWRU B	OSU B	0	10	10	20
CWRU A	CWRU C	10	10	10	30
Pitt A	CWRU D	10	10	10	30
Pitt B	Kenyon A	0	10	0	10
MSU A	OSU C	0	10	0	10
MSU B	Kenyon B	0	0	10	10
OSU A	Pitt C	0	10	0	10
James Madison	Roanoke	0	10	0	10
Liberty A	Virginia Tech A	0	10	0	10
North Carolina B	Liberty C	0	10	10	20
South Carolina A	NC State	0	10	10	20
Tennessee A	South Carolina B	10	10	0	20
North Carolina C	Tennessee B	0	10	10	20
Virginia A	Liberty B	0	10	10	20
North Carolina A	Virginia Tech B	0	10	10	20
Catholic University	Penn B	0	10	10	20
George Mason B	Maryland D	0	10	0	10
Notre Dame E	George Mason C	0	10	0	10
VCU A	George Washington A	0	0	0	0
Johns Hopkins A	George Washington B	10	10	0	20
George Mason A	Georgetown B	0	10	0	10
Georgetown A	Johns Hopkins B	0	10	0	10
Maryland B	Maryland A	0	10	10	20
NYU A	Johns Hopkins C	10	10	0	20
Maryland C	Penn A	0	10	0	10
Missouri B	Missouri A	0	10	0	10
Truman State	SIUE	0	10	0	10
WashU A	WashU D	10	10	10	30
WashU B	WashU C	0	10	0	10
Chicago B	Michigan B	0	10	10	20
Chicago C	UIC	0	10	10	20
Chicago D	Michigan D	10	10	10	30
Indiana A	Illinois A	10	0	10	20
Illinois B	Louisville A	10	10	10	30
Michigan A	Chicago A	10	10	10	30
Notre Dame C	Michigan C	0	10	0	10
Kentucky	Notre Dame A	0	0	10	10
Louisville B	Notre Dame B	0	10	0	10
Purdue B	Notre Dame D	0	10	10	20
Illinois C	Purdue A	0	0	0	0
Indiana B	Purdue C	0	10	0	10
Bowdoin A	Amherst A	0	10	10	20
Yale A	BC A	0	10	10	20
Brandeis Clemenceau	Amherst B	0	10	10	20
Brandeis Orlando	MIT A	0	10	0	10
Harvard	Brandeis Wilson	0	10	10	20
Brown B	Bowdoin B	0	0	0	0
Brandeis Lloyd George	Brown C	0	10	0	10
Cornell-UG	BU	0	10	10	20
MIT B	Tufts B	0	10	0	10
Tufts A	Brown A	0	10	0	10
Williams	BC B	0	10	0	10
Dartmouth	Yale B	10	10	10	30
Alberta	British Columbia A	0	10	0	10
British Columbia B	Simon Fraser	0	10	10	20
British Columbia C	Washington A	0	10	0	10
Edinburgh B	LSE B	0	10	10	20
Bristol A	Manchester B	10	0	10	20
Cambridge A	Warwick B	0	10	10	20
Binghamton A	ESF	0	10	0	10
RIT A	Binghamton B	0	10	0	10
Cornell-DII	Rochester	0	10	0	10
RIT B	Syracuse	0	10	10	20
Washington B	British Columbia D	10	10	10	30