The Stern-Gerlach magnet deflection spectrum of a molecular beam of OClO cooled by supersonic expansion is spatially resolved only at low pressures. At these pressures two beams separated in space are detected. At higher pressures no deflection is observed. We attribute this behavior to the formation of a diamagnetic dimer.
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We wouldl ike to thankt heI sraeliA cademyo f Sci-encef or supportingth isr esearchth rougha granta d-ministeredb y the Basic ResearchF oundation.W e woulda lsol ike to thankD r. C. Rav-Achaf or his advice ands upporta ndD r. S. Solomonf or advisingu s on the deptho f the stratosphericcl oud.D r. E. Som-inksa wishest o thank the Ministry of Sciencea nd Technologyfo r theirf inancials upport.