骚动
发表于 2025-3-23 09:59:16
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instructive
发表于 2025-3-23 16:33:51
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landfill
发表于 2025-3-23 21:07:35
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Mucosa
发表于 2025-3-23 22:16:32
https://doi.org/10.1007/978-3-658-17958-8Units and Measurements (ICRU) since 1928, when the roentgen was specified as aunt of what was then termed the “X-ray intensity” [.]. In 1953 the same organization defined the quantity “absorbed dose” applicable to any radiation and recommended that its (special) unit be the rad (equal to 100 ergs/g)
错
发表于 2025-3-24 05:41:53
ients and of energy-absorption coefficients. The mass energy-absorption coefficient is only one of many quantities that can be used to compute the transfer of energy to the medium. We also tabulate two of the other quantities, namely the mass energy-transfer coefficient and the mass absorption coeff
剥皮
发表于 2025-3-24 06:38:04
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书法
发表于 2025-3-24 10:44:19
https://doi.org/10.1007/978-3-662-43029-3 of emission. For a source which is distributed in space, the source strength may be measured in terms of the emission rate for a limited quantity of the material, as, for example, neutrons per second per cubic centimeter.
finale
发表于 2025-3-24 17:10:44
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聋子
发表于 2025-3-24 22:27:40
Dosimetric Fundamentals and Irradiation Limits,Units and Measurements (ICRU) since 1928, when the roentgen was specified as aunt of what was then termed the “X-ray intensity” [.]. In 1953 the same organization defined the quantity “absorbed dose” applicable to any radiation and recommended that its (special) unit be the rad (equal to 100 ergs/g)
披肩
发表于 2025-3-25 00:14:37
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