| section | 1 section | 2 section | 3 section | 4 section | 5 section | 6 section | 7 section | 8 section | 9 section | 10 section | 11 section | 12 section | 13 section | 14 section | 15 section | 16 section | 17 section | 18 section | 19 section | 20 section | 21 section | 22 section | 23 section | 24 section | 25 section | 26 section | 27 section | 28 section | 29 section | 30 section | 31 section | 32 section | 33 section | 34 section | 35 section | 36 section | 37 section | 38 section | 39 section | 40 section | 41 section | 42 section | 43 section | 44 section | 45 section | 46 section | 47 section | 48 section | 49 section | 50 section | 51 section | 52 section | 53 section | 54 section | 55 section | 56 section | 57 section | 58 section | 59 section | 60 section | 61 section | 62 section | 63 section | 64 section | 65 section | 66 section | 67 section | 68 section | 69 section | 70 section | 71 section | 72 section | 73 section | 74 section | 75 section | 76 section | 77 section | 78 section | 79 section | 80 section | 81 section | 82 section | 83 section | 84 section | 85 section | 86 section | 87 section | 88 section | 89 section | 90 section | 91 section | 92 section | 93 section | 94 section | 95 section | 96 section | 97 section | 98 section | 99 section | 100 section |
| barn | 2.589988110336 × 1034 b | 5.179976220672 × 1034 b | 7.769964331008 × 1034 b | 1.0359952441344 × 1035 b | 1.294994055168 × 1035 b | 1.5539928662016 × 1035 b | 1.8129916772352 × 1035 b | 2.0719904882688 × 1035 b | 2.3309892993024 × 1035 b | 2.589988110336 × 1035 b | 2.8489869213696 × 1035 b | 3.1079857324032 × 1035 b | 3.3669845434368 × 1035 b | 3.6259833544704 × 1035 b | 3.884982165504 × 1035 b | 4.1439809765376 × 1035 b | 4.4029797875712 × 1035 b | 4.6619785986048 × 1035 b | 4.9209774096384 × 1035 b | 5.179976220672 × 1035 b | 5.4389750317056 × 1035 b | 5.6979738427392 × 1035 b | 5.9569726537728 × 1035 b | 6.2159714648064 × 1035 b | 6.47497027584 × 1035 b | 6.7339690868736 × 1035 b | 6.9929678979072 × 1035 b | 7.2519667089408 × 1035 b | 7.5109655199744 × 1035 b | 7.769964331008 × 1035 b | 8.0289631420416 × 1035 b | 8.2879619530752 × 1035 b | 8.5469607641088 × 1035 b | 8.8059595751424 × 1035 b | 9.064958386176 × 1035 b | 9.3239571972096 × 1035 b | 9.5829560082432 × 1035 b | 9.8419548192768 × 1035 b | 1.010095363031 × 1036 b | 1.0359952441344 × 1036 b | 1.0618951252378 × 1036 b | 1.0877950063411 × 1036 b | 1.1136948874445 × 1036 b | 1.1395947685478 × 1036 b | 1.1654946496512 × 1036 b | 1.1913945307546 × 1036 b | 1.2172944118579 × 1036 b | 1.2431942929613 × 1036 b | 1.2690941740646 × 1036 b | 1.294994055168 × 1036 b | 1.3208939362714 × 1036 b | 1.3467938173747 × 1036 b | 1.3726936984781 × 1036 b | 1.3985935795814 × 1036 b | 1.4244934606848 × 1036 b | 1.4503933417882 × 1036 b | 1.4762932228915 × 1036 b | 1.5021931039949 × 1036 b | 1.5280929850982 × 1036 b | 1.5539928662016 × 1036 b | 1.579892747305 × 1036 b | 1.6057926284083 × 1036 b | 1.6316925095117 × 1036 b | 1.657592390615 × 1036 b | 1.6834922717184 × 1036 b | 1.7093921528218 × 1036 b | 1.7352920339251 × 1036 b | 1.7611919150285 × 1036 b | 1.7870917961318 × 1036 b | 1.8129916772352 × 1036 b | 1.8388915583386 × 1036 b | 1.8647914394419 × 1036 b | 1.8906913205453 × 1036 b | 1.9165912016486 × 1036 b | 1.942491082752 × 1036 b | 1.9683909638554 × 1036 b | 1.9942908449587 × 1036 b | 2.0201907260621 × 1036 b | 2.0460906071654 × 1036 b | 2.0719904882688 × 1036 b | 2.0978903693722 × 1036 b | 2.1237902504755 × 1036 b | 2.1496901315789 × 1036 b | 2.1755900126822 × 1036 b | 2.2014898937856 × 1036 b | 2.227389774889 × 1036 b | 2.2532896559923 × 1036 b | 2.2791895370957 × 1036 b | 2.305089418199 × 1036 b | 2.3309892993024 × 1036 b | 2.3568891804058 × 1036 b | 2.3827890615091 × 1036 b | 2.4086889426125 × 1036 b | 2.4345888237158 × 1036 b | 2.4604887048192 × 1036 b | 2.4863885859226 × 1036 b | 2.5122884670259 × 1036 b | 2.5381883481293 × 1036 b | 2.5640882292326 × 1036 b | 2.589988110336 × 1036 b |
a section is an area nominally one square mile (2.6 square kilometers), containing 640 acres (260 hectares), with 36 sections making up one survey township on a rectangular grid.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| section | ≡ 1 mi × 1 mi | = 2.589988110336×106 m2 | Imperial/US |
| sections | barns | sections | barns |
|---|---|---|---|
| 1 | = 2.589988110336E+34 | 6 | = 1.5539928662016E+35 |
| 2 | = 5.179976220672E+34 | 7 | = 1.8129916772352E+35 |
| 3 | = 7.769964331008E+34 | 8 | = 2.0719904882688E+35 |
| 4 | = 1.0359952441344E+35 | 9 | = 2.3309892993024E+35 |
| 5 | = 1.294994055168E+35 | 10 | = 2.589988110336E+35 |
A barn (symbol: b) is a 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.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| barn | b | ≡ 10−28 m2 | ≡ 10−28 m2 | Nuclear Physics |
| barns | sections | barns | sections |
|---|---|---|---|
| 1 | = 3.8610215854245E-35 | 6 | = 2.3166129512547E-34 |
| 2 | = 7.7220431708489E-35 | 7 | = 2.7027151097971E-34 |
| 3 | = 1.1583064756273E-34 | 8 | = 3.0888172683396E-34 |
| 4 | = 1.5444086341698E-34 | 9 | = 3.474919426882E-34 |
| 5 | = 1.9305107927122E-34 | 10 | = 3.8610215854245E-34 |
| sections | barns |
|---|---|
| 1 | = 2.589988110336 × 1034 |
| 3.8610215854245 × 10-35 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |