{"paper":{"title":"$Z=14$ Magicity Revealed by the Mass of the Proton Dripline Nucleus $^{22}$Si","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"nucl-ex","authors_text":"C. Y. Fu, F. R. Xu, G. de Angelis, H. F. Li, H. S. Xu, H. Y. Deng, H. Y. Jiao, I. Tanihata, J. C. Pei, J. G. Li, J. Y. Guo, J. Y. Shi, K. Blaum, K. H. Li, M. Si, M. Wang, M. Zhang, M. Z. Sun, P. Shuai, Q. Wang, Q. Yuan, R. J. Chen, T. Liao, T. Yamaguchi, W. J. Huang, W. W. Ge, X. H. Zhou, X. L. Tu, X. L. Yan, X. Xu, X. Zhou, Y. F. Luo, Y. F. Niu, Y. H. Zhang, Y. J. Yuan, Y. M. Xing, Yu. A. Litvinov, Y. Yu, Z. Y. Chen","submitted_at":"2025-03-03T10:24:36Z","abstract_excerpt":"Using the $B\\rho$-defined isochronous mass spectrometry technique, we conducted the first mass measurement of the proton dripline nucleus $^{22}$Si. We confirm that $^{22}$Si is bound against particle emission with $S_p/S_{2p}=+1412(114)/+229(54)$ keV, fixing the proton dripline location for the Si element. By analyzing the mass differences of the neighboring $sd$-shell nuclei, we find that $^{22}$Si exhibits a doubly-magic character similar to its mirror partner $^{22}$O, and that the mirror energy difference of $^{22}$Si-$^{22}$O deviates from the predictions assuming mirror symmetry. Gamow "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.01380","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2503.01380/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}