Experimental results of interaction between photon electron as \vell as photon and atom have studied in this paper. Interaction between photon and tenuous gas has been observed. The electron pulse and negative ion pulses have measured.

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Taking tenuous helium molecules for a spin

Published Jan 6, 2021• 0 citations

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DOI: 10.1038/d41586-020-03653-y

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Small weakly bound boson-fermion

^{4}\mathrm{He}_{m}^{3}\mathrm{He}_{n}

clusters formed in a free jet expansion are identified using nondestructive transmission grating diffraction. The observations confirm the existence of more than 11 very tenuous complexes including the three-body halo molecule

^{4}\mathrm{He}_{2}^{3}\mathrm{He}

and the pseudo-Borromean complex

^{4}\mathrm{He}_{2}^{3}\mathrm{He}_{2}

. Effective cluster formation temperatures, extracted from a sudden freeze model for cluster growth using theoretical binding energies, increase smoothly with cluster size, thereby confirming the calculations with the possible exception of

^{4}\mathrm{He}_{2}^{3}\mathrm{He}_{2}