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Like all other properties of a quantum particle, angular momentum is quantized, meaning it can only equal certain discrete values, which correspond to different rotational energy states. When a particle loses angular momentum, it is said to have transitioned to a lower rotational energy state. 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href="http://dbpedia.org/resource/Rotational_transition">Rotational transition</a> </h1> </div> </div> <div class="row"> <div class="col"> <div class="text-muted"> An Entity of Type: <a href="http://dbpedia.org/ontology/Organisation">organisation</a>, from Named Graph: <a href="http://dbpedia.org">http://dbpedia.org</a>, within Data Space: <a href="http://dbpedia.org">dbpedia.org</a> </div> </div> </div> <div class="row pt-2"> <div class="col-xs-9 col-sm-10"> In quantum mechanics, a rotational transition is an abrupt change in angular momentum. Like all other properties of a quantum particle, angular momentum is quantized, meaning it can only equal certain discrete values, which correspond to different rotational energy states. When a particle loses angular momentum, it is said to have transitioned to a lower rotational energy state. Likewise, when a particle gains angular momentum, a positive rotational transition is said to have occurred. </div> <div class="col-xs-3 col-sm-2"> <a href="#" class="thumbnail"> <img src="http://commons.wikimedia.org/wiki/Special:FilePath/Angular_Momentum_of_a_Diatomic_Molecule.png?width=300" alt="thumbnail" class="img-fluid" /> </a> </div> </div> </div> </section>   <section> <div class="container-xl"> <div class="row"> <div class="table-responsive"> <table class="table table-hover table-sm table-light"> <thead> <tr> <th class="col-xs-3 ">Property</th> <th class="col-xs-9 px-3">Value</th> </tr> </thead> <tbody> <tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/abstract">dbo:abstract</a> </td><td class="col-10 text-break"><ul> <li>In quantum mechanics, a rotational transition is an abrupt change in angular momentum. Like all other properties of a quantum particle, angular momentum is quantized, meaning it can only equal certain discrete values, which correspond to different rotational energy states. When a particle loses angular momentum, it is said to have transitioned to a lower rotational energy state. Likewise, when a particle gains angular momentum, a positive rotational transition is said to have occurred. Rotational transitions are important in physics due to the unique spectral lines that result. Because there is a net gain or loss of energy during a transition, electromagnetic radiation of a particular frequency must be absorbed or emitted. This forms spectral lines at that frequency which can be detected with a spectrometer, as in rotational spectroscopy or Raman spectroscopy. (en)</li> <li style="display:none;">In fisica quantistica una transizione rotazionale è un brusco cambiamento del momento angolare. Il momento angolare di una particella quantistica è quantizzato, intendendo con ciò che può assumere solo certi valori discreti che corrispondono a differenti stati di energia rotazionale. Quando una particella perde momento angolare, si dice che è passata ad uno stato più basso di energia rotazionale. Similarmente, quando una particella guadagna momento angolare, si dice che è avvenuta una transizione rotazionale positiva. Le transizioni rotazionali sono importanti in fisica a causa delle linee spettrali uniche che producono. Poiché esiste un guadagno netto di energia durante una transizione, deve essere assorbita o emessa della radiazione elettromagnetica di una particolare frequenza. Questa forma linee spettrali ad una frequenza che può essere rilevata con uno spettrometro, come nella spettroscopia Raman o nella spettroscopia IR o nella spettroscopia a microonde. (it)</li> <li style="display:none;">回転準位（かいてんじゅんい、rotational state）は量子力学において、分子の重心の移動を伴わない回転運動を表す量子状態である。回転準位間の遷移を回転遷移と呼び、多くの場合、気相におけるマイクロ波（特に、テラヘルツ波、サブミリ波、ミリ波）分光法を用いて観測される。 (ja)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/thumbnail">dbo:thumbnail</a> </td><td class="col-10 text-break"><ul> <li><a class="uri" rel="dbo:thumbnail" resource="http://commons.wikimedia.org/wiki/Special:FilePath/Angular_Momentum_of_a_Diatomic_Molecule.png?width=300" href="http://commons.wikimedia.org/wiki/Special:FilePath/Angular_Momentum_of_a_Diatomic_Molecule.png?width=300">wiki-commons:Special:FilePath/Angular_Momentum_of_a_Diatomic_Molecule.png?width=300</a></li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/wikiPageID">dbo:wikiPageID</a> </td><td class="col-10 text-break"><ul> <li>881269 (xsd:integer)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" 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href="http://dbpedia.org/ontology/Organisation">dbo:Organisation</a></li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://www.w3.org/2000/01/rdf-schema#comment">rdfs:comment</a> </td><td class="col-10 text-break"><ul> <li style="display:none;">回転準位（かいてんじゅんい、rotational state）は量子力学において、分子の重心の移動を伴わない回転運動を表す量子状態である。回転準位間の遷移を回転遷移と呼び、多くの場合、気相におけるマイクロ波（特に、テラヘルツ波、サブミリ波、ミリ波）分光法を用いて観測される。 (ja)</li> <li>In quantum mechanics, a rotational transition is an abrupt change in angular momentum. Like all other properties of a quantum particle, angular momentum is quantized, meaning it can only equal certain discrete values, which correspond to different rotational energy states. When a particle loses angular momentum, it is said to have transitioned to a lower rotational energy state. Likewise, when a particle gains angular momentum, a positive rotational transition is said to have occurred. (en)</li> <li style="display:none;">In fisica quantistica una transizione rotazionale è un brusco cambiamento del momento angolare. Il momento angolare di una particella quantistica è quantizzato, intendendo con ciò che può assumere solo certi valori discreti che corrispondono a differenti stati di energia rotazionale. Quando una particella perde momento angolare, si dice che è passata ad uno stato più basso di energia rotazionale. Similarmente, quando una particella guadagna momento angolare, si dice che è avvenuta una transizione rotazionale positiva. 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