6533b7d8fe1ef96bd12698ae

RESEARCH PRODUCT

Diffraction of neutral helium clusters: evidence for "magic numbers".

Jesús NavarroR. BrühlJ. P. ToenniesR. GuardiolaTim SavasOleg KornilovAnton Kalinin

subject

PhysicsQuantum fluidDiffractionJet (fluid)chemistryPeriod (periodic table)General Physics and Astronomychemistry.chemical_elementNanotechnologyDiffusion Monte CarloMolecular physicsDiffraction gratingHelium

description

The size distributions of neutral 4He clusters in cryogenic jet beams, analyzed by diffraction from a 100 nm period transmission grating, reveal magic numbers at N=10-11, 14, 22, 26-27, and 44 atoms. Whereas magic numbers in nuclei and clusters are attributed to enhanced stabilities, this is not expected for quantum fluid He clusters on the basis of numerous calculations. These magic numbers occur at threshold sizes for which the quantized excitations calculated with the diffusion Monte Carlo method are stabilized, thereby providing the first experimental confirmation for the energy levels of 4He clusters.

yearjournalcountryeditionlanguage
2004-05-06Physical review letters
10.1103/physrevlett.92.185301https://pubmed.ncbi.nlm.nih.gov/15169495