英语词汇“half-value thickness”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

A value of a physical property that is half an earlier value; used esp. attrib., as half-value period = half-life n. 2; half-value thickness (see quot. 1938).

ΘΚΠ

the world > relative properties > number > specific numbers > two > division into two > [noun] > division into two equal parts > a half

halfc950

halfendealc1000

half-part1398

half-deal1399

mediety?1440

moiety1444

demi1501

demi-parcela1592

single1592

second1594

tally1647

'arf1854

half-value1903

the world > space > extension in space > measurable spatial extent > thickness > [noun] > thickness of material that halves radiation

half-value thickness1938

1903 London, Edinb., & Dublin Philos. Mag. 6th Ser. 5 578 The activity of the radium emanation decays to half-value in four days.

1908 Amer. Jrnl. Sci. 175 506 The half-value period of radium is..about 2000 years.

1910 Nature 6 Oct. 431/1 It is proposed that the term ‘half-value period’ should be used in all cases to represent the term required for a substance to be transformed to half its original value.

1922 Times Lit. Suppl. 18 May 318/2 The rate of decay of an element is measured by the ‘half-value’ period, which may vary from 10¹⁰ years to 10⁻¹¹ of a second.

1938 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity (ed. 2) iii. 37 The intensity of the radiation is reduced to half its value in its passage through a layer of thickness o·16 mm. Al... Accordingly, the ‘half-value thickness’ of aluminium for the β-rays from RaE has the value of 0·16 mm.

1955 C. Croxson in W. C. Newell Casting of Steel xii. 531 Some half-value thicknesses for steel are shown in the following table.

1962 F. I. Ordway et al. Basic Astronautics xii. 500 A useful concept in physical shielding is that of the half value layer (HVL) or the thickness of a specific material required to reduce a particular quantity of radiation by half.

1963 W. E. Burcham Nucl. Physics ii. 30 The interval..during which half the atoms disappear by decay (half-value period or half-life).

单词	half-value thickness
释义	> as lemmas half-value thickness A value of a physical property that is half an earlier value; used esp. attrib., as half-value period = half-life n. 2; half-value thickness (see quot. 1938). ΘΚΠ the world > relative properties > number > specific numbers > two > division into two > [noun] > division into two equal parts > a half halfc950 halfendealc1000 half-part1398 half-deal1399 mediety?1440 moiety1444 demi1501 demi-parcela1592 single1592 second1594 tally1647 'arf1854 half-value1903 the world > space > extension in space > measurable spatial extent > thickness > [noun] > thickness of material that halves radiation half-value thickness1938 1903 London, Edinb., & Dublin Philos. Mag. 6th Ser. 5 578 The activity of the radium emanation decays to half-value in four days. 1908 Amer. Jrnl. Sci. 175 506 The half-value period of radium is..about 2000 years. 1910 Nature 6 Oct. 431/1 It is proposed that the term ‘half-value period’ should be used in all cases to represent the term required for a substance to be transformed to half its original value. 1922 Times Lit. Suppl. 18 May 318/2 The rate of decay of an element is measured by the ‘half-value’ period, which may vary from 10¹⁰ years to 10⁻¹¹ of a second. 1938 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity (ed. 2) iii. 37 The intensity of the radiation is reduced to half its value in its passage through a layer of thickness o·16 mm. Al... Accordingly, the ‘half-value thickness’ of aluminium for the β-rays from RaE has the value of 0·16 mm. 1955 C. Croxson in W. C. Newell Casting of Steel xii. 531 Some half-value thicknesses for steel are shown in the following table. 1962 F. I. Ordway et al. Basic Astronautics xii. 500 A useful concept in physical shielding is that of the half value layer (HVL) or the thickness of a specific material required to reduce a particular quantity of radiation by half. 1963 W. E. Burcham Nucl. Physics ii. 30 The interval..during which half the atoms disappear by decay (half-value period or half-life). extracted from half-valuen. < as lemmas
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