First Dynamic Deuteron Polarization Measurements in Irradiated ND3

Hartel, Uta; Kaul, O.; Meyer, W.; Rennings, K.; Schilling, E.

doi:10.1007/978-3-0348-6301-8_48

Cited by 1 publication

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“…RADIATION-DOPED AMMONIA TARGETS Another method to introduce the paramagnetic radicals into solidified target materials (frozen beads or chips) is to irradiate the pure samples. This preparation technique for the DNP was first successfully used with NH 3 (61) and ND 3 (62,63). Two different irradiation techniques can be employed, and both make use of high-intensity ionizing particle beams to produce an adequate number of radicals (some 10 19 spins/ml) in a reasonable amount of time: (a) high-temperature irradiation at 80 -90 K; and (b) low-temperature irradiation at 1 K.…”

Section: Target Materialsmentioning

confidence: 99%

Solid Polarized Targets for Nuclear and Particle Physics Experiments

Crabb

Meyer

1997

Annu. Rev. Nucl. Part. Sci.

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164

220

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The development, in the early 1960s, of the dynamic nuclear polarization process in solid diamagnetic materials, doped with paramagnetic radicals, led to the use of solid polarized targets in numerous nuclear and particle physics experiments. Since then steady progress has been made in all contributing subsystems so that proton polarizations near 100% and deuteron polarizations higher than 50% have been achieved in various materials. More radiation-resistant materials, such as ammonia, have made it possible to perform experiments with high beam intensities and experiments that benefit from 4 He cooling at 1K and high magnetic fields. The development of dilution refrigerators have allowed frozen spin operation so that experiments with large angular acceptance for the scattered particles have become routine. Many experiments have taken advantage of these developments and many more are being planned, especially with electromagnetic probes.

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Section: Target Materialsmentioning

confidence: 99%