Recently,our group produced spin-polarized hydrogen(SPH)atoms at densities of at least 10^(19)cm^(-3)from the photodissociation of hydrogen halide molecules with circularly polarized UV light and measured them via mag...Recently,our group produced spin-polarized hydrogen(SPH)atoms at densities of at least 10^(19)cm^(-3)from the photodissociation of hydrogen halide molecules with circularly polarized UV light and measured them via magnetization-quantum beats with a pickup coil.These densities are approximately 7 orders of magnitude higher than those produced using conventional methods,opening up new fields of application,such as ultrafast magnetometry,the production of polarized MeV and GeV particle beams,such as electron beams with intensities approximately 10^(4)higher than current sources,and the study of polarized nuclear fusion,for which the reaction cross sections of D-T and D-(3)^He reactions are expected to increase by 50%for fully polarized nuclear spins.We review the production,detection,depolarization mechanisms,and potential applications of high-density SPH.展开更多
基金This work is supported by the Hellenic Foundation for Research and Innovation(HFRI)and the General Secretariat for Research and Technology(GSRT),grant agreement No.HFRI-FM17-3709(project NUPOL)and by the project"HELLASCHH(MIS 5002735)Which is implemented under the"Action for Strengthening Research and Innovation Infrastructures",funded by the Operational Programme"Competitiveness,Entrepreneurship and Innovation"(NSRF 2014-2020)cofinanced by Greece and the European Union(European Regional Development Fund).GK acknowledges funding from the Hellenic Foundation for Research and Innovation(HFRI)and the General Secretariat for Research and Technology(G5RT),under project HANDCORE grant agreem ent No 1789.Figure 5 is adapted with permission from Boulogiannis et al.,"Spin-polarized hydrogen depolarization rates at high hydrogen halide pressures:hyperfine depolarization via the HY-H complex",The Journal of Physical Chemistry A 123,8130-8134(2019)。
文摘Recently,our group produced spin-polarized hydrogen(SPH)atoms at densities of at least 10^(19)cm^(-3)from the photodissociation of hydrogen halide molecules with circularly polarized UV light and measured them via magnetization-quantum beats with a pickup coil.These densities are approximately 7 orders of magnitude higher than those produced using conventional methods,opening up new fields of application,such as ultrafast magnetometry,the production of polarized MeV and GeV particle beams,such as electron beams with intensities approximately 10^(4)higher than current sources,and the study of polarized nuclear fusion,for which the reaction cross sections of D-T and D-(3)^He reactions are expected to increase by 50%for fully polarized nuclear spins.We review the production,detection,depolarization mechanisms,and potential applications of high-density SPH.
