Výsledky vyhledávání - "L. R. Lichty"

Cross relaxation between proton and quadrupolar nuclear spins in metal-hydrogen systems

Autor: J.-W. Han, L. R. Lichty, R. G. Barnes, E. F. W. Seymour, D. R. Torgeson

Publikováno v: Physical review. B, Condensed matter. 42(13)

Enhanced proton-NMR spin-lattice-relaxation rates ${\mathit{R}}_{1}$ measured over a range of frequencies and temperatures in the Nb-H, Nb-V-H, and Ta-H metal-hydrogen systems are attributed to dipolar cross relaxation between the Zeeman energy level

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b3ec8e816f2b3167fb91db5367d7237
https://pubmed.ncbi.nlm.nih.gov/9994933

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Proton Spin-Lattice Relaxation Rate Study of Hydrogen Motion and Cross-Relaxation in HCP Lutetium*

Autor: J-W. Han, E.F.W. Seymour, R. G. Barnes, L. R. Lichty, D. R. Torgeson, P. C-T. Chang, G. W. West

Publikováno v: Zeitschrift für Physikalische Chemie. 164:853-858

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::10d521a28d5c96055134d868e7b7f72b
https://doi.org/10.1524/zpch.1989.164.part_1.0853

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NMR search for evidence of hydrogen pairing in h.c.p. yttrium

Autor: R. G. Barnes, R.J. Schoenberger, D. R. Torgeson, L. R. Lichty

Publikováno v: Journal of the Less Common Metals. 129:31-38

We report the results of a proton nuclear magnetic resonance (NMR) study of hydrogen in solid solution in h.c.p. yttrium (α-YH 0.2 ) over the temperature range 77–715 K. The concept of hydrogen “pairing” in closely adjacent tetrahedral (T) sit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e804d2b91829036abe4e15484cbeb174
https://doi.org/10.1016/0022-5088(87)90030-0

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Anomalous proton spin-lattice relaxation at high temperatures in bcc transition-metal–hydrogen solid-solution systems

Autor: L. R. Lichty, J. L. Billeter, E. F. W. Seymour, J.-W. Han, Robert M. Cotts, R. G. Barnes, D. R. Torgeson

Publikováno v: Physical Review B. 40:9025-9034

We report anomalous behavior of the proton spin-lattice relaxation time {ital T}{sub 1} at high temperatures (up to 1000 K) for hydrogen in solution in the bcc metals V, Nb, and Ta and in a Nb-V alloy. Besides the usual {ital T}{sub 1} minimum at int

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db310c45848af873dd46027f7dfc9036
https://doi.org/10.1103/physrevb.40.9025

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Low-temperature localized motion of hydrogen and electronic structure transition in hexagonal-close-packed scandium

Autor: C. A. Sholl, L. R. Lichty, J.-W. Han, R. G. Barnes, E. F. W. Seymour, D. R. Torgeson, R. Ibanez-Meier

Publikováno v: Physical Review B. 39:2012-2021

We report nuclear magnetic resonance (NMR) measurements of the proton (/sup 1/H) spin-lattice relaxation rate (R/sub 1/) in the hexagonal-close-packed (hcp) solid solution (..cap alpha..) phase of the Sc-H system over the temperature range 10--300 K

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f4dd347acbc3811a549647f1638e8b1
https://doi.org/10.1103/physrevb.39.2012

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Photoluminescence and Odmr Studies of Pristine and Photodegraded Poly (3-Hexylthiophene) Films and Solutions

Autor: Joseph Shinar, L.S. Swanson, Katsumi Yoshino, L. R. Lichty

Publikováno v: MRS Proceedings. 173

The photoluminescence (PL) and optically detected magnetic resonance (ODMR) spectra of poly(3-hexylthiophene) in solutions of CCl4, toluene, and CH2Cl2, and films cast from these solutions, are described and discussed. In solution, the PL yield is 7%

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0574aa13b3fbfc7e5f4472e76e21a23f
https://doi.org/10.1557/proc-173-385

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