| half-value layer |
The half-value layer is the thickness of a substance which reduces the intensity of a beam of radiation to one-half of its initial value. The half-value layer is a function of the energy of the gamma and the composition of the shield or absorber. Examples:
출처: www.cardinalsurveys.com/glos.htm
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| halfway house |
Any private or public agency under contract to the Department of Public Safety or the Department of Corrections to provide residential and/or non residential treatment and transitional services for DOC offenders.
출처: www.doc.state.co.us/Victim_Notification/victim_not...
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| half-life |
the time in which one half of the atoms of a particular radioactive substance disintegrates into another nuclear form. Half-lives vary from millionths of a second to billions of years.
출처: www.ehs.washington.edu/training/Radsaf/nurse/terms...
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| half-life |
One half-life is the length of time required for the amount of radioactivity present to be reduced by 50%. At each subsequent time interval equaling one half-life, the previous amount of radioactivity is further reduced by half. The half-life can be viewed as the probability of decay. An individual radioactive atom may decay at any time, but for a given quantity of radioactivity, the number of particle emissions per unit time, also referred to as "disintegration rate," will be a constant.
출처: bfa.sdsu.edu/ehs/physical.htm
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| half-life |
Saturday night in Fresno
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