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        "description": "This was a dilute excited-state gas, distinct from liquid superfluid helium and earlier alkali and hydrogen gas condensates. Atom-number calibration and inferred scattering length have large uncertainties; the authors could not distinguish two-body from three-body losses and gave upper bounds under separate assumptions. The manuscript credits an independent Orsay observation made with a different detection method. The arXiv v1 quoted collision rate differs from the later journal abstract; no version equivalence is assumed.",
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      "statement": "# A metastable-helium gas forms a Bose-Einstein condensate\n\nPereira Dos Santos and colleagues observed a condensate of metastable helium-4 atoms in a magnetic trap using absorption imaging after release. Its bimodal distribution and changing expansion anisotropy supported condensation. They estimated the scattering length and reported roughly two-second condensate decay.\n\n## Scientific scope\n\nThis was a dilute excited-state gas, distinct from liquid superfluid helium and earlier alkali and hydrogen gas condensates. Atom-number calibration and inferred scattering length have large uncertainties; the authors could not distinguish two-body from three-body losses and gave upper bounds under separate assumptions. The manuscript credits an independent Orsay observation made with a different detection method. The arXiv v1 quoted collision rate differs from the later journal abstract; no version equivalence is assumed.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nF. Pereira Dos Santos; J. Léonard; Junmin Wang; C. J. Barrelet; F. Perales; E. Rasel; C. S. Unnikrishnan; M. Leduc; C. Cohen-Tannoudji\n\nThese are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.\n\n\n\n## Original sources\n\n- [Bose-Einstein Condensation of Metastable Helium](https://arxiv.org/pdf/cond-mat/0103387v1)\n",
      "summary": "Pereira Dos Santos and colleagues observed a condensate of metastable helium-4 atoms in a magnetic trap using absorption imaging after release. Its bimodal distribution and changing expansion anisotropy supported condensation. They estimated the scattering length and reported roughly two-second condensate decay.",
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    "what_changed": "Pereira Dos Santos and colleagues observed a condensate of metastable helium-4 atoms in a magnetic trap using absorption imaging after release. Its bimodal distribution and changing expansion anisotropy supported condensation. They estimated the scattering length and reported roughly two-second condensate decay.",
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