Results 101 to 110 of about 4,129 (201)

Thermal conductivity of gaseous and liquid hydrogen [PDF]

open access: yes, 1971
Normal and para-hydrogen conductivity measurements at temperatures from 200 to 17 deg K, at densities up to 2.6 times critical density, and at pressures to 15 MN/sq m are made.
Diller, D. E., Roder, H. M.
core   +1 more source

Density Matrix of Two Spin-1/2 Particles: Pure and Mixed States

open access: yesConcepts in Magnetic Resonance: Part A, Bridging Education and Research
The density matrix of an arbitrary pure state of a system consisting of two spin-1/2 particles is derived from the Pauli spin angular momentum operators.
Eric R. Johnston
doaj   +1 more source

Quantum Monte Carlo study of thin parahydrogen films on graphite

open access: yesResults in Physics
The low-temperature properties of one and two layers of parahydrogen adsorbed on graphite are investigated theoretically through Quantum Monte Carlo simulations. We adopt a microscopic model that explicitly includes the corrugation of the substrate.
Jie-Ru Hu, Massimo Boninsegni
doaj   +1 more source

SABRE-hyperpolarization dynamics of [1-13C]pyruvate monitored by in situ zero- to ultra-low field NMR

open access: yesJournal of Magnetic Resonance Open
Hyperpolarized [1–13C]pyruvate is the leading metabolite used in the emerging field of hyperpolarization-enhanced MRI. Signal amplification by reversible exchange (SABRE) is a straight forward hyperpolarization method that has recently been shown to ...
Adam Ortmeier   +8 more
doaj   +1 more source

Thermodynamic and transport properties of fluids and selected solids for cryogenic applications Summary report, 1 Dec. 1965 - 1 Nov. 1970 [PDF]

open access: yes
Summary data on thermodynamic and transport properties of fluids and solids for cryogenic ...
Diller, D. E., Johnson, V. J.
core   +1 more source

A computer program for the calculation of thermal stratification and self-pressurization in a liquid hydrogen tank [PDF]

open access: yes
An analysis and computer program are described for calculating the thermal stratification and the associated self-pressurization of a closed liquid hydrogen tank.
Arnett, R. W., Voth, R. O.
core   +1 more source

Quality determination of liquid-solid hydrogen mixtures [PDF]

open access: yes
Quality determinations of liquid-solid hydrogen mixtures from mass fraction of vapor pumped off in freeze-thaw ...
Daney, D. E., Mann, D. B.
core   +1 more source

Hydrogen slush density reference system [PDF]

open access: yes
A hydrogen slush density reference system was designed for calibration of field-type instruments and/or transfer standards. The device is based on the buoyancy principle of Archimedes.
Cruz, J. E.   +4 more
core   +1 more source

Parahydrogen-induced polarization of 14N nuclei

open access: yesAngewandte Chemie International Edition
Abstract Hyperpolarization techniques provide a dramatic increase in sensitivity of nuclear magnetic resonance spectroscopy and imaging. In spite of the outstanding progress in solution‐state hyperpolarization of spin‐1/2 nuclei, hyperpolarization of quadrupolar nuclei remains challenging.
Salnikov, Oleg G.   +8 more
openaire   +4 more sources

An Experimental Setup to Study Electron Transport and Thermalization in Cryogenic Para-Hydrogen Crystal Matrices

open access: yesInstruments
We present an experimental apparatus to investigate electron transport and thermalization in cryogenic para-hydrogen crystal matrices. This paper describes the techniques used to grow and characterize the cryogenic para-hydrogen crystals, the optical ...
Piergiorgio Antonini   +19 more
doaj   +1 more source

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