Symbol for carbon 11.

carbon-11 (11C)

a radioisotope of carbon with a half-life of 20 minutes. It is produced by a cyclotron and emits positrons. Compare carbon-14.


A positron-emiting radioisotope of carbon, which is produced in a cyclotron, has a T1/2 of 20.38 minutes, decays 100% by positron emission to 11B, and is used in PET scanning.
References in periodicals archive ?
The mercury level may drop to 11C in Doha and below 5C in the southern parts of the country during this period, it said.
In the meantime, the milder conditions of 11C today and 13C tomorrow look like the calm before this chill sets in.
SATURDAY, OCTOBER 22 Bloxwich bonfire and fireworks display takes place from 6pm Temperature: 11C Wind speed: 12mph Gusts: 17mph SUNDAY, OCTOBER 23 Temperature: 11C Wind speed: 14mph Gusts: 20mph MONDAY, OCTOBER 24 Temperature: 12C Wind speed: 11mph Gusts: 15mph TUESDAY, OCTOBER 25 Temperature: 12C Wind speed: 10mph Gusts: 16mph WEDNESDAY, OCTOBER 26 Temperature:11C Wind speed: 4mph Gusts: 6mph THURSDAY, OCTOBER 27 Temperature: 10C Wind speed: 4mph Gusts: 6mph FRIDAY, OCTOBER 28 Drayton Manor Theme Park's bonfire and fireworks from 7pm Temperature: 11C Wind speed: 7mph Gusts: 12mph SATURDAY, OCTOBER 29 Tamworth Round Table and Willenhall bonfire and fireworks events take place from 6pm, and Drayton Manor Theme Park's from 7pm.
In Area 11C at Cumberworth, the home team lost their unbeaten record as a four-run victory by Kirkburton put the teams on level points - but that result gave the away team the 11C title on the head-to-head of that game.
Residents of Sharjah, Ajman, Umm Al Qwain and Ras Al Khaimah can expect some rain on Wednesday with lows of 11C.
Top temperatures across the UK will plummet to 12C today and 11C by midweek, said the Met Office.
However, that will move away and a front is coming in from the Atlantic, across the country from west to east, which will bring with it some rain and, after that ,colder air, with temperatures more like 10 or 11C on Saturday.
The weather will remain cooler than typical for this time of the year with temperatures during the day reaching up to 11C a 16C.
Bahrain's cold weather will continue today and tomorrow with temperatures expected to drop to below 11C, a report said.
BAHRAIN'S cold snap will continue today and tomorrow with temperatures expected to drop to below 11C.
11C has been preserved as a two bedroom, 1-bath apartment with an entry foyer leading to the livingroom, where there's e decorative fireplace, detailed moldings, and original Herringbone wood floors.
The temperature was recorded as low as minus 11C in Kalat district.