GREPhysics.NET: GR8677 #85

GR8677 #85

Problem

GREPhysics.NET Official Solution

Advanced Topics $\Rightarrow$ }Nuclear Physics

Pair production only occurs above a certain energy on the order of MeV. Thus, all except choices (B) and (C) remain.

The photoelectric effect is dominant for low energies, so its cross-section must be line (1). Choose choice (B).

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Comments

petr1243 2008-02-16 20:33:09	pg.528 of Modern Physics(3rd edition) by Serway, has a good explanation of these 3 processes. Reply to this comment
Hagus 2006-10-30 05:29:35	Correction: It should read, only choices B and C remain, or all except choices B and C are eliminated. Reply to this comment

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LaTeX syntax supported through dollar sign wrappers $, ex., $\alpha^2_0$ produces $\alpha^2_0$ .
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$\int_0^\infty$	$\int_0^\infty$
$\partial$	$\partial$
$\Rightarrow$	$\Rightarrow$
$\ddot{x},\dot{x}$	$\ddot{x},\dot{x}$
$\sqrt{z}$	$\sqrt{z}$
$\langle my \rangle$	$\langle my \rangle$
$\left( abacadabra \right)_{me}$	$\left( abacadabra \right)_{me}$
$\vec{E}$	$\vec{E}$
$\frac{a}{b}$	$\frac{a}{b}$

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