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orthohelium

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What are parahelium and orthohelium? - Physics Stack Exchange
Each energy level (defined by two quantum numbers, n and ℓ) can be inhabited by a single electron. Orthohelium does not have this energy level ... physics.stackexchange.com
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Orthohelium and Parahelium - Richard Fitzpatrick
Helium in the spin-singlet state is known as parahelium, whereas helium in the triplet state is called orthohelium. farside.ph.utexas.edu
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Helium Energy Levels - HyperPhysics
It is observed that the orthohelium states are lower in energy than the parahelium states. The explanation for this is: The parallel spins make the spin part of ... hyperphysics.phy-astr.gsu.edu
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orthohelium
orthohelium (stress variable) [f. ortho- + helium, as an antonym of the earlier par(a)helium.] The form of helium whose spectrum exhibits a fine structure of triplets owing to the spins of the two orbital electrons being parallel.1922 A. D. Udden tr. Bohr's Theory of Spectra iii. iii. 86 Helium was ... Oxford English Dictionary
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Helium atom - Wikipedia
Hence parahelium can also be said to be the spin anti-symmetric state (singlet state) or orthohelium to be spin symmetric state (triplet state). ... Hence ... en.wikipedia.org
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[PDF] Helium atom - parahelium and orthohelium - Physics Pages
States with an antisymmetric spin function are known as parahelium, and states with a symmetric spin function are known as orthohelium. physicspages.com
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parahelium
parahelium (stress variable) Also parhelium. [f. para-1 3 + helium.] The form of helium whose spectrum does not exhibit the fine structure of orthohelium, owing to the spins of the two orbital electrons being anti-parallel.1896 Runge & Paschen in Astrophysical Jrnl. III. 18 We come to the conclusion... Oxford English Dictionary
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Para & Ortho Helium (Spin Isomers) | Quantum Mechanics - YouTube
When scientists investigated the spectrum of helium, they found two different kinds of spectra, where the one set of energy levels ... www.youtube.com
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orthohelium - Wiktionary, the free dictionary
orthohelium (uncountable). (physics) form of the helium atom in which the spins of the two electrons form a triplet state (a state with definite total spin) ... en.wiktionary.org
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[PDF] Quantum Mechanics and Atomic Physics
2. Orthohelium: ▫ electrons have parallel spins, s'=1, triplet spin eigenfunctions ... www.physics.rutgers.edu
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Orthohelium Alternative Electron Configuration
Orthohelium is much easier to observe (more stable) than Parahelium and so appears to represent more solid physics. The fact that RealQM gives ... claesjohnson.blogspot.com
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Helium atom
electrons) requires antisymmetry under simultaneous exchange of spin and coordinates Parahelium is then the singlet state with a symmetric function and orthohelium This explains the absence of the state (with ) for orthohelium, where consequently (with ) is the metastable ground state. wikipedia.org
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orthohydrogen
orthohydrogen (stress variable) Also ortho hydrogen and with hyphen. [f. ortho- + hydrogen as tr. G. orthowasserstoff (Bonhoeffer & Harteck 1929, in Naturwissenschaften XVII. 182/1), coined on the analogy of orthohelium (see quot. 1935).] The form of molecular hydrogen in which the two nuclei in the... Oxford English Dictionary
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metastable
metastable, a. (mɛtəˈsteɪb(ə)l) [Irreg. f. meta- + stable a., as tr. of G. metastabil (coined in sense 1 by W. Ostwald, in Lehrb. d. allgemeinen Chem. (1893) II. i. 517).] 1. Of a physical system: persisting (in its existing state) when undisturbed or subject to disturbances smaller than some small ... Oxford English Dictionary
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