Barn (unit)
A barn (symbol: b) is a metric unit of area equal to 10−28 m2 (100 fm2). Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields of high-energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles. A barn is approximately the cross-sectional area of a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of a nucleus with an electric field gradient. While the barn never was an SI unit, the SI standards body acknowledged it in the 8th SI Brochure (superseded in 2019) due to its use in particle physics.
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1 E-24 cm²1 E-28 m21 E-28 m²750 GeV diphoton excessATLAS Forward Proton ProjectAccelerator Neutrino Neutron Interaction ExperimentAlkali metalAlkaline earth metalAmericiumArDMAreaB (disambiguation)BaBar experimentBar (unit)BarnBarn (area)Barn (disambiguation)Barn (physics)Barn unitBerkeliumBerylliumBreeder reactorCarbon-14Compact Linear ColliderConversion of unitsCowan–Reines neutrino experimentCritical massCross section (physics)CuriumEDELWEISSEinsteiniumExtended periodic tableFBFemtobarnFemtometreFission-fragment rocket1,2-dimethoxyethaan
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Barn (unit)
A barn (symbol: b) is a metric unit of area equal to 10−28 m2 (100 fm2). Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields of high-energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles. A barn is approximately the cross-sectional area of a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of a nucleus with an electric field gradient. While the barn never was an SI unit, the SI standards body acknowledged it in the 8th SI Brochure (superseded in 2019) due to its use in particle physics.
has abstract
A barn (symbol: b) is a metric ...... o its use in particle physics.
@en
Barn (b) – jednostka przekroju ...... ym naturalnie jądrem atomowym.
@pl
Barn (símbolo: b) é uma unidad ...... ais, (GeV)−2(ℏc)² = 0.3894 mb.
@pt
Barn (značka "b") je jednotka ...... . krása, vůně, půvab u kvarků.
@cs
Barn adalah satuan luas penamp ...... ng umum dalam fisika partikel.
@in
Barn är en enhet för area och ...... ägg (hit the side of a barn)".
@sv
Das Barn b (engl. für ‚Scheune ...... 0−24 cm2 = 10−28 m2 = 100 fm2.
@de
De barn is een eenheid van opp ...... schuur" ("as big as a barn").
@nl
El barn (símbolo b) es una un ...... 12 barn = 10−36 cm² = 10−40 m²
@es
El barn és una unitat per a me ...... a guerra i es manté fins avui.
@ca
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E
−28
@en
inunits
MeV−2
@en
name
Barn
@en
namedafter
the broad side of a barn
@en
quantity
area
@en
standard
symbol
b
@en
u
m2
@en
units
wikiPageUsesTemplate
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type
comment
A barn (symbol: b) is a metric ...... o its use in particle physics.
@en
Barn (b) – jednostka przekroju ...... b): 1 pb = 10–12 b = 10–40 m2.
@pl
Barn (símbolo: b) é uma unidad ...... ais, (GeV)−2(ℏc)² = 0.3894 mb.
@pt
Barn (značka "b") je jednotka ...... ismů konkrétních druhů reakcí.
@cs
Barn adalah satuan luas penamp ...... ng umum dalam fisika partikel.
@in
Barn är en enhet för area och ...... ägg (hit the side of a barn)".
@sv
Das Barn b (engl. für ‚Scheune ...... 0−24 cm2 = 10−28 m2 = 100 fm2.
@de
De barn is een eenheid van opp ...... de kern van een uraniumatoom.
@nl
El barn (símbolo b) es una un ...... 12 barn = 10−36 cm² = 10−40 m²
@es
El barn és una unitat per a me ...... poralment al SI". Té símbol b.
@ca
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Barn (enhet)
@sv
Barn (satuan)
@in
Barn (unit)
@en
Barn
@ca
Barn
@cs
Barn
@de
Barn
@es
Barn
@fr
Barn
@it
Barn
@nl