roentgen


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roentgen

 [rent´gen]
the international unit of x- or γ-radiation; it is the quantity of x- or γ-radiation such that the associated corpuscular emission per 0.001293 g of air produces, in air, ions carrying 1 electrostatic unit of electrical charge of either sign. Abbreviated R.

Roent·gen

(rĕnt'gĕn),
Wilhelm K., German physicist and Nobel laureate, 1845-1923. Discovered x-rays in November, 1895; awarded Nobel Prize in Physics in 1901 for his discovery. See: roentgen, roentgen ray.

roent·gen (R, r),

(rĕnt'gĕn, rent'chen),
The international unit of exposure dose for x-rays or gamma rays; that quantity of radiation that will produce, in 1 cc or 0.001293 g of air at STP, 2.08 × 109 ions of both signs, each totaling 1 electrostatic unit (esu) of charge; in the MKS system this is 2.58 × 10-4 coulombs per kg of air.
[Wilhelm K. Roentgen]

roentgen

/roent·gen/ (rent´gen) the international unit of x- or γ-radiation; it is the quantity of x- or γ-radiation such that the associated corpuscular emission per 0.001293 g of dry air produces in air ions carrying 1 electrostatic unit of electrical charge of either sign. Symbol R.

roentgen

also

röntgen

(rĕnt′gən, -jən, rŭnt′-)
n. Abbr. R or r
A unit of radiation exposure equal to the quantity of ionizing radiation that will produce one electrostatic unit of electricity in one cubic centimeter of dry air at 0°C and standard atmospheric pressure.

roent′gen adj.

roentgen (R)

[rent′gən, ren′jən]
Etymology: Wilhelm K. Roentgen, German physicist, 1845-1923
the quantity of x-radiation or gamma radiation that creates 1 electrostatic unit of ions in 1 mL of air at 0° and 760 mm of pressure. In radiotherapy or radiodiagnosis, the roentgen is the unit of the emitted dose. See also radiation absorbed dose, rem.

roent·gen

(r, R) (rent'gen)
The international unit of exposure dose for x-rays or gamma rays; that quantity of radiation that will produce in 1 cm of air at STP, or 0.001293 g of air, 2.08 × 109 ions of both signs, each totaling 1 electrostatic unit (e.s.u.) of charge; in the MKS system this is 2.58 × 10-4 coulombs per kg of air.
[Wilhelm K. Roentgen]

Roentgen

or

Röntgen, Wilhelm Konrad

(1845–1923) German physicist who discovered X-RAYS. A roentgen or röntgen is the quantity of X-rays or gamma radiation used as a unit of radioactivity. Symbol: R or r.

Roentgen,

Wilhelm K., German physicist and Nobel laureate, 1845-1923.
roentgen - the international unit of exposure dose for x-rays or gamma rays.
roentgen ray - Synonym(s): x-ray
roentgenograph - Synonym(s): radiograph

roentgen

a superseded international unit of x- or γ-radiation; it is the quantity of x- or γ-radiation such that the associated corpuscular emission per 0.001293 g of air produces, in air, ions carrying 1 electrostatic unit of electrical charge of either sign. Abbreviated R. Now replaced by coulomb/kg (C/kg); see coulomb. 1 R = 2.58 × 10−4 C/kg; 1 C/kg = 3876 R.

roentgen equivalent man (rem)
see rem.
roentgen equivalent physical (rep)
see rep.
roentgen ray
x-ray.
References in periodicals archive ?
There is a suite of Roentgen furniture at Buckingham Palace, and another at Chatsworth ordered by the Duke of Devonshire at a time when many English grandees, as well as wealthy aristos throughout Europe, chose Roentgen furniture for their palaces.
According to many sources, he was the first to discover Roentgen radiation, and named it "special radiation" [2, 4, 6, 12, 13, 23, 27, 28, 30, 32, 55, 57, 61-63], since a few years before the discovery of X-rays he investigated the phenomenon of glowing tubes with diluted gas in order to obtain low cost lighting [55].
Roentgen saw her death through an x-ray; it's time we used technology to make sure no one else has to.
Priscilla Slanetz said at the annual meeting of the American Roentgen Ray Society.
Priscilla Slanetz reported during the annual meeting of the American Roentgen Ray Society.
Roentgen was experimenting with vacuum tubes in a dim room when he noticed that a nearby plate, that had been coated with barium platinocyanide, began to glow.
In fact, positioning may be a more important factor in overlooked cancers than breast compression, radiation exposure or image sharpness and contrast, according to a news release from the American Roentgen Ray Society.
THE X-ray was discovered by German Wilhelm Roentgen at the end of the 19th Century.
Value of Schuller conventional roentgen diagnosis and computerized tomography of the temporal bone in preoperative diagnosis of the Tubingen implantable cochlear amplifier].
Now, the Roentgen satellite (ROSAT) and the Extreme Ultraviolet Explorer (EUVE) spacecraft have provided new details of the sun's environment.
The 120th anniversary of the discovery of X-rays, which are called roentgen rays in the honor of Wilhelm Roentgen, was celebrated on the 28th of December 2015.
Which discovery led to Wilhelm Roentgen being awarded the first Nobel Prize for physics in 1901?