neutrons - 2025 ACF Winter

Question

A form of small-angle scattering using these particles can help resolve the structures of colloids. For 10 points each:

[10e] Identify these subatomic particles that elastically scatter with atomic nuclei. Isotopes of the same element differ in the number of these chargeless particles.

ANSWER: neutrons [accept small-angle neutron scattering or SANS]

[10h] The quality of SANS scattering is a function of I and this other quantity. This quantity gives information on the overall size of a molecule and is multiplied by q on the x-axis of a Guinier (“gheen-YAY”) plot.

ANSWER: radius of gyration [prompt on Rg]

[10m] SANS provides lower-resolution information than this other scattering technique used to solve atomic protein structure. The phase problem must be solved in this technique which may employ the Patterson function.

ANSWER: X-ray crystallography [or XRC; accept X-ray diffraction or XRD]

<Editors, Chemistry>

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Summary


California	Main	Y	4	15.00	100%	50%	0%
Canada	Main	Y	6	13.33	100%	33%	0%
Great Lakes	Main	Y	4	15.00	100%	50%	0%
Lower Mid-Atlantic	Main	Y	7	12.86	100%	29%	0%
Midwest	Main	Y	10	12.00	100%	20%	0%
Northeast	Main	Y	5	14.00	100%	40%	0%
Overflow	Main	Y	4	12.50	100%	25%	0%
Pacific Northwest	Main	Y	10	16.00	100%	60%	0%
South Central	Main	Y	5	10.00	100%	0%	0%
Southeast	Main	Y	12	15.00	100%	42%	8%
UK	Main	Y	4	12.50	100%	25%	0%
Upper Mid-Atlantic	Main	Y	8	16.25	100%	63%	0%
Upstate NY	Main	Y	8	12.50	100%	25%	0%
2024 ARCADIA at UC Berkeley	04/19/2025	Y	1	20.00	100%	100%	0%

Data


Berkeley A	Stanford A	10	0	0	10
Berkeley E	Berkeley B	10	0	10	20
Berkeley D	Berkeley C	10	0	0	10
Stanford C	Stanford B	10	0	10	20
Claremont Scripps	Claremont Pitzer	10	0	10	20
UCLA A	USC	10	0	10	20
UCSD Two Running Violet V Forms	UCLA B	10	0	0	10
UCLA C	UCSD Vices and Virtues	10	0	0	10
UCLA D	UCSB	10	0	0	10
UCSD What Hath God Wrought	UCI	10	0	0	10
UF A	UCF B	10	0	10	20
UF E	UF B	10	0	0	10
USF	Melbourne B	10	0	0	10
UCF A	FIU	10	0	10	20
CWRU D	Pitt B	10	0	10	20
MSU A	CWRU B	10	0	0	10
OSU A	OSU D	10	0	0	10
CWRU A	OSU B	10	0	10	20
Pitt A	OSU C	10	0	0	10
Pitt C	Kenyon B	10	0	0	10
James Madison	Liberty B	10	0	0	10
NC State	Roanoke	10	0	0	10
South Carolina B	Virginia B	10	0	0	10
Virginia Tech A	Tennessee A	10	0	0	10
Tennessee B	Tusculum	10	0	0	10
North Carolina B	Virginia A	10	0	0	10
Virginia Tech B	North Carolina C	10	0	10	20
Clemson A	South Carolina A	10	0	0	10
Clemson B	Liberty C	10	0	0	10
North Carolina A	Liberty A	10	0	10	20
MSU B	Kenyon A	10	0	0	10
Columbia A	Columbia C	10	0	10	20
Rutgers B	Lehigh A	10	0	0	10
Rutgers C	Vassar A	10	0	0	10
Swarthmore A	Lehigh B	10	0	0	10
Columbia B	Rowan A	10	0	10	20
Missouri A	WashU A	10	0	10	20
WashU B	Missouri B	10	0	0	10
WashU C	Truman State	10	0	0	10
WashU D	William Woods	10	0	0	10
UIC	Chicago B	10	0	10	20
Illinois A	Chicago C	10	0	10	20
Illinois B	Kentucky	10	0	10	20
Illinois C	Michigan A	10	0	0	10
Indiana A	Michigan C	10	0	10	20
Indiana B	Louisville B	10	0	0	10
Michigan B	Notre Dame C	10	0	10	20
Michigan D	Notre Dame D	10	0	0	10
Purdue A	Chicago A	10	0	0	10
Louisville A	Purdue B	10	0	10	20
Macalester A	Macalester B	10	0	0	10
Carleton	Minnesota A	10	0	0	10
Iowa State	St. Thomas	10	0	0	10
Wisconsin	Nebraska	10	0	0	10
BU	Brown C	10	0	0	10
BC B	Bowdoin A	10	0	10	20
Amherst B	Bowdoin B	10	0	0	10
Brandeis Clemenceau	MIT B	10	0	0	10
Tufts A	Brandeis Lloyd George	10	0	0	10
Brandeis Wilson	BC A	10	0	0	10
Amherst A	Brown A	10	0	10	20
Tufts B	Brown B	10	0	10	20
Cornell-UG	Williams	10	0	0	10
MIT A	Harvard	10	0	10	20
Yale A	Dartmouth	10	10	10	30
Brandeis Orlando	Yale B	10	0	0	10
Minnesota B	Minnesota C	10	0	0	10
Alberta	British Columbia C	10	0	0	10
British Columbia A	British Columbia B	10	0	0	10
Simon Fraser	British Columbia D	10	0	10	20
Washington A	Washington B	10	0	0	10
Northwestern C	Iowa	10	0	10	20
Alberta B	McGill D	10	0	0	10
Arizona State A	Northwestern A	10	0	10	20
Texas A	Northwestern B	10	0	10	20
Tulsa	Rose State	10	0	10	20
Texas B	UCO	10	0	0	10
UTD A	Arizona State B	10	0	10	20
UTD B	Ohio	10	0	0	10
Mississippi State A	Auburn B	10	0	0	10
Vanderbilt A	Georgia Tech A	10	0	10	20
Georgia Tech B	Bruin A	10	0	0	10
Georgia Tech C	Georgia Tech D	10	0	10	20
Huntsville B	Alabama B	10	0	0	10
Alabama A	Sewanee A	10	0	0	10
Huntsville A	UAB A	10	0	0	10
Vanderbilt B	Auburn A	10	0	0	10
RIT B	Cornell-DII	10	0	10	20