Spectroscopy in Solid Hydrogen Takeshi Oka Department of Chemistry and Department of Astronomy and Astrophysics The Enrico Fermi Institute, the University.

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Spectroscopy in Solid Hydrogen Takeshi Oka Department of Chemistry and Department of Astronomy and Astrophysics The Enrico Fermi Institute, the University of Chicago Informal seminar for the group of Zheng-Tian Lu Argonne National Laboratories, March 9,

Molecular Hydrogen 2 electrons -e μ 0 2 protons e gμ n The principle of superposition Dirac Chapter 1 (12)Ψ = ̶ Ψ Dirac, Proc. Roy. Soc. A112, 661 (1926) S. Tomonaga, The Story of Spin (1997) S = S 1 + S 2 S = 0 I = I 1 + I 2 I = 0 para-H 2 J = 0 I = 1 ortho-H 2 J = 1 J = 0 J = K Triple point K

p-H 2 3 He 4 HeNeAr T.P. T (K) T.P. P(kPa) b.p. T (K) m.v.(cc/mol) crystal struc.hcpbcc hcp/bccfcc/hcp nn dist. (Å) zero p. amp (Å) Debye T. (K) Lennard-Jones potential