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Changing the magnetic field by several Gauss caused the collision rate to vary by a factor of 10,000, and the sign of the scattering length could be reserved. The resonance peak is at 155.2(4) G and its width is 11.6(5) G. From these results we extract much improved values for the three quantities that characterize the interaction porential: the van der Waals coefficient C6, the singlet scattering length, and the triplet scattering length."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"physics/9808018","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"physics.atom-ph","submitted_at":"1998-08-14T18:53:20Z","cross_cats_sorted":[],"title_canon_sha256":"1b559e31468b6c430619d2e533483a7f97f3e02ae8c2ac3c2770dc2c8955f42a","abstract_canon_sha256":"03e1e4b9054174d5f0983a0e701848729410ff1b3bdeb814ae8fccd1bff48ed0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:47:09.397449Z","signature_b64":"xZeF4DO1WBXv3IxLOKNL3XYuWIr9WfnDCNXK7ZL62wJFkYnN7Z5yO4w3xWc8AzyPdin9bgAO4Dpnu0vJX6oaCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d7c54ef46171a712ea4e9faadcaeefef5fc128fd0dce9e1000a6a5da9858887","last_reissued_at":"2026-05-18T03:47:09.396734Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:47:09.396734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Resonant magnetic field control of elastic scattering of cold 85Rb","license":"","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"C. 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