# Difference between revisions of "Dictionary:Capture cross section"

Tanyabadillo (talk | contribs) (Prepared the page for translation) |
Tanyabadillo (talk | contribs) (Marked this version for translation) |
||

Line 3: | Line 3: | ||

</translate> | </translate> | ||

{{lowercase}} | {{lowercase}} | ||

− | <translate>{{#category_index:C|capture cross section}} | + | <translate><!--T:1--> |

+ | {{#category_index:C|capture cross section}} | ||

<b>1</b>. The <b>atomic capture cross section</b> for neutrons is the effective area within which a neutron has to pass to be captured by an atomic nucleus. It is a probabilistic value dependent on the nature and energy of the particle as well as the nature of the capturing nucleus. Atomic capture cross section is often measured in <b>barns</b> (1 barn=10<sup>–28</sup> m<sup>2</sup>). <b>2</b>. The <b>macroscopic capture cross section, Σ</b>, is the effective cross-sectional area per unit volume for capture of neutrons; it depends on the number of atoms present as well as their atomic capture cross sections. The unit of measure for Σ is cm<sup>2</sup>/cm<sup>3</sup>=10<sup>3</sup> cu, where cu=[[Special:MyLanguage/Dictionary:capture_unit|''capture'' ''unit'']] (q.v.). <b>3</b>. The rate of absorption of thermal neutrons with a velocity ''V'' is ''V''Σ. | <b>1</b>. The <b>atomic capture cross section</b> for neutrons is the effective area within which a neutron has to pass to be captured by an atomic nucleus. It is a probabilistic value dependent on the nature and energy of the particle as well as the nature of the capturing nucleus. Atomic capture cross section is often measured in <b>barns</b> (1 barn=10<sup>–28</sup> m<sup>2</sup>). <b>2</b>. The <b>macroscopic capture cross section, Σ</b>, is the effective cross-sectional area per unit volume for capture of neutrons; it depends on the number of atoms present as well as their atomic capture cross sections. The unit of measure for Σ is cm<sup>2</sup>/cm<sup>3</sup>=10<sup>3</sup> cu, where cu=[[Special:MyLanguage/Dictionary:capture_unit|''capture'' ''unit'']] (q.v.). <b>3</b>. The rate of absorption of thermal neutrons with a velocity ''V'' is ''V''Σ. | ||

</translate> | </translate> |

## Latest revision as of 20:15, 27 February 2017

**1**. The **atomic capture cross section** for neutrons is the effective area within which a neutron has to pass to be captured by an atomic nucleus. It is a probabilistic value dependent on the nature and energy of the particle as well as the nature of the capturing nucleus. Atomic capture cross section is often measured in **barns** (1 barn=10^{–28} m^{2}). **2**. The **macroscopic capture cross section, Σ**, is the effective cross-sectional area per unit volume for capture of neutrons; it depends on the number of atoms present as well as their atomic capture cross sections. The unit of measure for Σ is cm^{2}/cm^{3}=10^{3} cu, where cu=*capture* *unit* (q.v.). **3**. The rate of absorption of thermal neutrons with a velocity *V* is *V*Σ.