SPIN-ALIGNED HYDROGEN : SOME CONSIDERATIONS FOR ESR VS. NMR EXPERIMENTS AND PRELIMINARY OBSERVATIONS OF H↑ AT LOW TEMPERATURES B. Yurke, D. Igner, E. Smith, B. Johnson, J. Denker, C. Hammel, D. Lee et J. FreedJ. Phys. Colloques, 41 C7 (1980) C7-177-C7-184DOI: https://doi.org/10.1051/jphyscol:1980729