impact parameter

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noun (in nuclear physics)

the perpendicular distance from the original center of a set of scattering particles to the original line of motion of a particle being scattered.

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Words nearby impact parameter

In this nervous city in an embattled country, even small explosions can have a big impact.
Is Putin Turning to Terrorism in Ukraine?|Anna Nemtsova|January 6, 2015|DAILY BEAST
The EPA felt that the State Department had not looked carefully enough at the impact of the pipeline if oil prices fell.
Fact-Checking the Sunday Shows: Jan. 4|PunditFact.com|January 5, 2015|DAILY BEAST
Residents of the neighborhoods where cops are needed the most are mixed on the impact of the apparent slowdown.
Ground Zero of the NYPD Slowdown|Batya Ungar-Sargon|January 1, 2015|DAILY BEAST
Strong currents and winds, however, mean any debris could be drifting up to 31 miles a day eastward, away from the impact zone.
Wreckage, Bodies of AirAsia Crash Found|Lennox Samuels|December 30, 2014|DAILY BEAST

It made a big impact on him and he realized, “Wow, there really is a Santa, at least in the hearts of some people.”
Kerry Bentivolio: The Congressman Who Believes in Santa Claus|Ben Jacobs|December 24, 2014|DAILY BEAST
The impact dragged down on the speed of the roadster so that the rear right fender was only crumpled by the brick work.
Hooded Detective, Volume III No. 2, January, 1942|Various
But "son" had rebounded from the impact like a rubber ball, or the best trained gymnast of his school, as he was.
Dorothy at Skyrie|Evelyn Raymond
I saw Johnny Burke's body jerk a bit under the impact of the slugs, but he was too big to be stopped by them.
Hooded Detective, Volume III No. 2, January, 1942|Various
I felt the impact of that culture in her interested eyes and in the sleek, smart bearing of her utterly relaxed body.
Valley of the Croen|Lee Tarbell
The impact stresses depend so much on local conditions that it is difficult to fix what allowance should be made.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various