{"paper":{"title":"Quasi-free Neutron Knockout Reaction Reveals a Small $s$-orbital Component in the Borromean Nucleus $^{17}$B","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"4 M. Sasano, A. Corsi, A. Delbart, A. Giganon, A. Gillibert, A. Obertelli, A. T. Saito, C. Caesar, C. Santamaria, C. X. Yuan, D. Calvet, D. Kim, E. C. Pollacco, F. Flavigny, F. M. Marqes, F. R. Xu, G. Authelet, H. Baba, H. Otsu, H. Sato, J. Feng, J. Gibelin, J. G. Li, J.-M. Gheller, J. Tsubota, J. Yasuda, J.-Y. Rousse, J. Zenihiro, K. Hasegawa, K. Ogata, K. Yoneda, K. Yoshida, L. Stuhl, M. Dozono, M. Kimura, M. Kobayashi, M. Sako, M. Shikata, M. Tabata, N. A. Orr, N. Kobayashi, N. Michel, N. Nakatsuka, Q. Yuan, S.-G. Zhou, S. Kawakami, S. Koyama, S. Ota, S. Paschalis, S. Reichert, S. Sakaguchi, T. Isobe, T. Kobayashi, T. Miyazaki, T. Motobayashi, T. Nakamura, T. Ozaki, T. Sumikama, T. Uesaka, V. Lapoux, V. Panin, W. Zuo, X.-X. Sun, y A. Ohkura, Y. Kanaya, Y. Kiyokawa, Y. Kondo, Y. Kubota, Y. L. Sun, Y. Maeda, Y. Nishio, Y. Shimizu, Y. Shindo, Y. Togano, Z. H. Yang, Z. Korkulu","submitted_at":"2021-02-07T02:13:10Z","abstract_excerpt":"A kinematically complete quasi-free $(p,pn)$ experiment in inverse kinematics was performed to study the structure of the Borromean nucleus $^{17}$B, which had long been considered to have neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for $1s_{1/2}$ and $0d_{5/2}$ orbitals, and a surprisingly small percentage of 9(2)$\\%$ was determined for $1s_{1/2}$. Our finding of such a small $1s_{1/2}$ component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.03699","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/2102.03699/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"}