Sievertn.

Brit.

/ˈsiːvət/, U.S. /ˈsɪvərt/,

/ˈsivərt/

Etymology: < the name of R. M. Sievert (1896–1966), Swedish radiologist.

Used to denote either of two units of dose of ionizing radiation.

†a. Sievert unit n. (see quot. 1955). Obsolete.

ΘΚΠ

the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [noun] > units of radioactivity > as dosage

Sievert unit1945

rem1947

rep1947

Sievert1977

1945 C. W. Wilson Radium Therapy iii. 70 For the practical determination of the Sievert unit dose by this method, the measurement is made..with a chamber having walls of a finite thickness.

1955 Gloss. Terms Radiol. (B.S.I.) 19 Sievert unit, a unit of gamma-ray dose, being the dose of radiation delivered in one hour at a distance of 1 cm from a point source of 1 mg of radium element enclosed in platinum 0·5 mm thick. It is numerically equal to about 8·4 röntgens.

b. (Written sievert.) (See quot. 1977.)

ΘΚΠ

the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [noun] > units of radioactivity > as dosage

Sievert unit1945

rem1947

rep1947

Sievert1977

1977 Ann. ICRP I. iii. 4/1 The special name for the unit of dose equivalent is the sievert (Sv): 1 Sv = 1 Jkg⁻¹ (= 100 rem).

1982 Sci. Amer. Feb. 34/2 The data come from fairly high doses of radiation (·5 sievert to two sieverts).

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).

单词	sievert
释义	Sievertn. Brit. /ˈsiːvət/, U.S. /ˈsɪvərt/, /ˈsivərt/ Etymology: < the name of R. M. Sievert (1896–1966), Swedish radiologist. Used to denote either of two units of dose of ionizing radiation. †a. Sievert unit n. (see quot. 1955). Obsolete. ΘΚΠ the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [noun] > units of radioactivity > as dosage Sievert unit1945 rem1947 rep1947 Sievert1977 1945 C. W. Wilson Radium Therapy iii. 70 For the practical determination of the Sievert unit dose by this method, the measurement is made..with a chamber having walls of a finite thickness. 1955 Gloss. Terms Radiol. (B.S.I.) 19 Sievert unit, a unit of gamma-ray dose, being the dose of radiation delivered in one hour at a distance of 1 cm from a point source of 1 mg of radium element enclosed in platinum 0·5 mm thick. It is numerically equal to about 8·4 röntgens. b. (Written sievert.) (See quot. 1977.) ΘΚΠ the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [noun] > units of radioactivity > as dosage Sievert unit1945 rem1947 rep1947 Sievert1977 1977 Ann. ICRP I. iii. 4/1 The special name for the unit of dose equivalent is the sievert (Sv): 1 Sv = 1 Jkg⁻¹ (= 100 rem). 1982 Sci. Amer. Feb. 34/2 The data come from fairly high doses of radiation (·5 sievert to two sieverts). This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018). < n.1945
随便看	meekship meekspirited meekswarded meemaw meemawing meemie meemies meep meeping meeple meered meerkat meerkats meerschaum meerschaum pipe meerschaums meese meester meet meet a etc in the face meet a person in the face meet a person's etc meet a person's expectation meet a person's expectations meet a person's eye