{"paper":{"title":"Precise electromagnetic tests of ab-initio calculations of light nuclei: States in $^{10}$Be","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"C.J. Chiara, C.J. Lister, D. Seweryniak, E.A. McCutchan, I. Stefanescu, J.P. Greene, M.P. Carpenter, R.B. Wiringa, R.V.F. Janssens, Steven C. Pieper, S. Zhu, T. Lauritsen, T.L. Khoo","submitted_at":"2009-07-21T15:51:21Z","abstract_excerpt":"In order to test {\\it ab-initio} calculations of light nuclei, we have remeasured lifetimes in $^{10}$Be using the Doppler Shift Attenuation Method (DSAM) following the $^{7}$Li($^7$Li,$\\alpha$)$^{10}$Be reaction at 8 and 10 MeV. The new experiments significantly reduce systematic uncertainties in the DSAM technique. The J$^{\\pi}$ = $2^+_1$ state at 3.37 MeV has $\\tau$ = 205${\\pm}$(5)$_{stat}\\pm$(7)$_{sys}$ fs corresponding to a $B$($E2\\downarrow$) of 9.2(3) $e^2$fm$^4$ in broad agreement with many calculations. The J$^{\\pi}$ = $2^+_2$ state at 5.96 MeV was found to have a $B$($E2\\downarrow$) "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3688","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}