decimetn.
/ˈdɛsᵻmɛt/, U.S. /ˈdɛsəˌmɛt/ Particle Physics.
A multiplet (multiplet n. 2b) of ten subatomic particles.
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the world > matter > physics > quantum theory > electron spin > multiplet > [noun] > of specific number of particles
sextuplet1900
singlet1920
triplet1923
octet1961
nonet1963
decimet1964
nonuplet1969
1964 M. Gell-Mann & Y. Ne’eman in Ann. Physics 30 367 Ek is an octet (k = 1,…8), Tn is a decimet (n = 1,…10).
1974 New Scientist 21 Feb. 455/2 The hadrons can be classified into related groups, most of them octets, one a decimet, and a few singlets.
2008 A. L. Chien Rates & Spectra of Lambda, Cascade, & Omega Hyperons 6 The Ω− baryon is part of the spin 3/2 decimet that results from the three quark combination.
This is a new entry (OED Third Edition, June 2015; most recently modified version published online March 2022).
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n.1964