Diffusion de protons polarises de 20 MeV par une cible de protons polarises et mesure preliminaire du parametre Cnn

Dynamic Orientation of Nuclei

“…The nuclear spin system may be the nuclei contained in the paramagnetic ions, atoms, radicals, etc; or neighboring nuclei in diamagnetic atoms; or the nuclei in metals. In this article we discuss in the second section (p. 106) three representative cases: (a) Para magnetic ions in crystals in weak dipole coupling with nuclei of neighboring diamagnetic atoms; this is the method developed at Saclay (33,34), Oxford (35), and Berkeley (30,31,36,37) and recently applied to polarized proton targets (38,39), discussed in detail in Section III. (b) Paramagnetic ions in strong hfs coupling with nuclei of the same ion.…”

Spins in exotic nuclei: RI beam experiments with polarized targets

“…While practical application of brute force methods are limited to cases of ferromagnetic atoms (Rose effect [37]) and of the HD molecule [38], the DNP technique is more versatile: since its first application to nuclear and high-energy physics experiments [44,45], many polarized proton/deuteron targets have been constructed based on the DNP technique [35,36]. In the traditional DNP method, electrons thermally polarized at a temperature less than 1 Kelvin and in a high magnetic field of several Tesla are used to polarize nuclei.…”

A Short History of Spin

“…Initially met with great skepticism, Overhauser's suggestion was experimentally verified by Carver and Slichter later that year [49]. Working independently, Jefferies [50] and Abragam [52] both suggested to dynamically polarize nuclei by saturating so-called "forbidden transitions" in which electron and nuclear spins flip simultaneously. In 1962, Abragam, Borghini and co-workers built the first polarized proton target for the 20 MeV polarized proton beam at Saclay [52].…”