Proton T1 for solid H2 in a-Si:H

V. P. Bork; P. A. Fedders; R. E. Norberg; J. B. Boyce; M. Stutzmann

doi:10.1016/0022-3093(85)90757-4

Proton T₁ for solid H₂ in a-Si:H

V. P. Bork, P. A. Fedders, R. E. Norberg, J. B. Boyce, M. Stutzmann

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Abstract

Proton spin-lattice relaxation times T₁(H₂) are reported for solid n-H₂ in plasma-deposited a-Si:H. T₁(H₂) has been measured for the dipolar Pake doublet NMR component (corresponding to 0-H₂ molecules frozen out into m_j = 0 states) between 1.6 and 13 K in an unannealed sample and between 1.6 and 5 K in a sample annealed at 500°C. In both samples below 3 K T₁ (H₂) is about the same as the T₁ (H) observed for the lattice-bound protons. At warmer temperatures T₁ (H₂) is 30 to 50% smaller than T₁ (H). The 175 kHz doublet H₂ cannot rapidly exchange spin energy with the narrower line-width lattice H and the two systems relax independently. The temperature variations of T₁ (H₂) and T₁ (H) are compared with the predictions of phonon-Raman relaxation models.

Original language	English
Pages (from-to)	711-714
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	77-78
Issue number	PART 1
DOIs	https://doi.org/10.1016/0022-3093(85)90757-4
State	Published - 2 Dec 1985
Externally published	Yes

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title = "Proton T1 for solid H2 in a-Si:H",

abstract = "Proton spin-lattice relaxation times T1(H2) are reported for solid n-H2 in plasma-deposited a-Si:H. T1(H2) has been measured for the dipolar Pake doublet NMR component (corresponding to 0-H2 molecules frozen out into mj = 0 states) between 1.6 and 13 K in an unannealed sample and between 1.6 and 5 K in a sample annealed at 500°C. In both samples below 3 K T1 (H2) is about the same as the T1 (H) observed for the lattice-bound protons. At warmer temperatures T1 (H2) is 30 to 50% smaller than T1 (H). The 175 kHz doublet H2 cannot rapidly exchange spin energy with the narrower line-width lattice H and the two systems relax independently. The temperature variations of T1 (H2) and T1 (H) are compared with the predictions of phonon-Raman relaxation models.",

author = "Bork, {V. P.} and Fedders, {P. A.} and Norberg, {R. E.} and Boyce, {J. B.} and M. Stutzmann",

year = "1985",

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T1 - Proton T1 for solid H2 in a-Si:H

AU - Bork, V. P.

AU - Fedders, P. A.

AU - Norberg, R. E.

AU - Boyce, J. B.

AU - Stutzmann, M.

PY - 1985/12/2

Y1 - 1985/12/2

N2 - Proton spin-lattice relaxation times T1(H2) are reported for solid n-H2 in plasma-deposited a-Si:H. T1(H2) has been measured for the dipolar Pake doublet NMR component (corresponding to 0-H2 molecules frozen out into mj = 0 states) between 1.6 and 13 K in an unannealed sample and between 1.6 and 5 K in a sample annealed at 500°C. In both samples below 3 K T1 (H2) is about the same as the T1 (H) observed for the lattice-bound protons. At warmer temperatures T1 (H2) is 30 to 50% smaller than T1 (H). The 175 kHz doublet H2 cannot rapidly exchange spin energy with the narrower line-width lattice H and the two systems relax independently. The temperature variations of T1 (H2) and T1 (H) are compared with the predictions of phonon-Raman relaxation models.

AB - Proton spin-lattice relaxation times T1(H2) are reported for solid n-H2 in plasma-deposited a-Si:H. T1(H2) has been measured for the dipolar Pake doublet NMR component (corresponding to 0-H2 molecules frozen out into mj = 0 states) between 1.6 and 13 K in an unannealed sample and between 1.6 and 5 K in a sample annealed at 500°C. In both samples below 3 K T1 (H2) is about the same as the T1 (H) observed for the lattice-bound protons. At warmer temperatures T1 (H2) is 30 to 50% smaller than T1 (H). The 175 kHz doublet H2 cannot rapidly exchange spin energy with the narrower line-width lattice H and the two systems relax independently. The temperature variations of T1 (H2) and T1 (H) are compared with the predictions of phonon-Raman relaxation models.

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JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

IS - PART 1

ER -

Proton T₁ for solid H₂ in a-Si:H

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