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  2. Clarke Studies - Wikipedia

    en.wikipedia.org/wiki/Clarke_Studies

    The second volume, published in 1912 as Clarke's Technical Studies for Cornet, includes 190 exercises divided into ten studies with notes from the author suggesting how to practice them. Each of the ten studies concludes with an exercise serving as an étude , except for the ninth study, which lacks an exercise labeled as such, and the tenth ...

  3. File:Mollow triplet.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Mollow_triplet.pdf

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  4. Multiplicity (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Multiplicity_(chemistry)

    The total angular momentum quantum number J can vary from L+S = 2 to L–S = 0 in integer steps, so that J = 2, 1 or 0. [1] [2] However the multiplicity equals the number of spin orientations only if S ≤ L. When S > L there are only 2L+1 orientations of total angular momentum possible, ranging from S+L to S-L. [2] [3] The ground state of the ...

  5. Triplet state - Wikipedia

    en.wikipedia.org/wiki/Triplet_state

    Examples of atoms in singlet, doublet, and triplet states. In quantum mechanics, a triplet state, or spin triplet, is the quantum state of an object such as an electron, atom, or molecule, having a quantum spin S = 1. It has three allowed values of the spin's projection along a given axis m S = −1, 0, or +1, giving the name "triplet".

  6. Intersystem crossing - Wikipedia

    en.wikipedia.org/wiki/Intersystem_crossing

    [2] The radiative decay from an excited triplet state back to a singlet state is known as phosphorescence. Since a transition in spin multiplicity occurs, phosphorescence is a manifestation of intersystem crossing. The time scale of intersystem crossing is on the order of 10 −8 to 10 −3 s, one of the slowest forms of relaxation. [3]

  7. Singlet fission - Wikipedia

    en.wikipedia.org/wiki/Singlet_fission

    Singlet fission is a spin-allowed process, unique to molecular photophysics, whereby one singlet excited state is converted into two triplet states.The phenomenon has been observed in molecular crystals, aggregates, disordered thin films, and covalently-linked dimers, where the chromophores are oriented such that the electronic coupling between singlet and the double triplet states is large.

  8. Triplet-triplet annihilation - Wikipedia

    en.wikipedia.org/wiki/Triplet-Triplet_Annihilation

    The energy of the first triplet excited state (T 1) is transferred to a second triplet excited state (T 1), resulting in (1) the first T 1 returning to the singlet ground state S0 and (2) the second T 1 promoting to the singlet excited state (S 1). Triplet-triplet annihilation (TTA) is an energy transfer mechanism where two molecules in their ...

  9. Doublet–triplet splitting problem - Wikipedia

    en.wikipedia.org/wiki/Doublet–triplet_splitting...

    In particle physics, the doublet–triplet (splitting) problem is a problem of some Grand Unified Theories, such as SU(5), SO(10), and . Grand unified theories predict Higgs bosons (doublets of S U ( 2 ) {\displaystyle SU(2)} ) arise from representations of the unified group that contain other states, in particular, states that are triplets of ...