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HK: Hadronen und Kerne
HK 56: Postersitzung
HK 56.29: Poster
Mittwoch, 18. März 1998, 17:00–19:00, Foyer
About the possibility of a dynamically polarized HD–target — •E. Radtke, St. Goertz, M. Grosse–Stoltenberg, J. Harmsen, A. Meier, W. Meyer, G. Reicherz, M. Schlüter, and Th. Zawodny — Universität Bochum
Polarized solid targets are an important tool to study the spin–structure
of the nukleons. It is crucial to use a material with a high
amount of free polarizable protons or deuterons, described by a
dilution–factor κ.
Because of the non–magnetic ground–state of the most desirable material
H2 with κ = 1 attention has also been drawn to HD.
To polarize HD dynamically, efforts have been made in the seventies.
Proton–polarizations of ≈ 3.75% have been obtained[1]. It is
expected to improve this value considerably by using lower temperatures, higher
magnetic fields and HD–material, which contains less impurities such as
H2 and D2. Both species shorten the nuclear relaxation–times.
Since chemical doping is excluded due to the low melting point, paramagnetic
impurities, namely H–atom radicals have to be induced either by irradiation
of the solid or by an hf–discharge in the gaseous state followed by immediate
solidification.
[1] J. C. Solem, NIMMs 117 (1974) 477