Absorber

For an element in group theory, see Absorbing element.

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In high energy physics experiments, an absorber is a block of material used to absorb some of the energy of an incident particle in an experiment. Absorbers can be made of a variety of materials, depending on the purpose; lead, tungsten and liquid hydrogen are common choices.[1] Most absorbers are used as part of a particle detector; particle accelerators use absorbers to reduce the radiation damage on accelerator components.[2]

## Other uses of the same word

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* Absorbers are used in ionization cooling, as in the International Muon Ionization Cooling Experiment.
* In solar power, a high degree of efficiency is achieved by using black absorbers which reflect off much less of the incoming energy.
* In sunscreen formulations, ingredients which absorb UVA/UVB rays, such as avobenzone and octyl methoxycinnamate, are known as absorbers. They are contrasted with physical "blockers" of UV radiation such as titanium dioxide and zinc oxide.

## References

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1. ^ "Slide 1" (PDF). Physics.utoronoto.ca. Retrieved 2016-12-23.
2. ^ E.H. Hoyer; W.C. Turner; N.V. Mokhov. "ABSORBERS FOR THE HIGH LUMINOSITY INSERTIONS OF THE LHC" (PDF). Accelconf.web.cern.ch. Retrieved 2016-12-23.

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