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Quasifree Neutron Knockout Reaction Reveals a Small s-Orbital Component in the Borromean Nucleus B-17

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Title
Quasifree Neutron Knockout Reaction Reveals a Small s-Orbital Component in the Borromean Nucleus B-17
Author(s)
Yang, Z. H.; Kubota, Y.; Corsi, A.; Yoshida, K.; Sun, X-X; Li, J. G.; Kimura, M.; Michel, N.; Ogata, K.; Yuan, C. X.; Yuan, Q.; Authelet, G.; Baba, H.; Caesar, C.; Calvet, D.; Delbart, A.; Dozono, M.; Feng, J.; Flavigny, F.; Gheller, J-M; Gibelin, J.; Giganon, A.; Gillibert, A.; Hasegawa, K.; Isobe, T.; Kanaya, Y.; Kawakami, S.; KIM, Da Hee; Kiyokawa, Y.; Kobayashi, M.; Kobayashi, N.; Kobayashi, T.; Kondo, Y.; Zeren KORKULU; Koyama, S.; Lapoux, V; Maeda, Y.; Marques, F. M.; Motobayashi, T.; Miyazaki, T.; Nakamura, T.; Nakatsuka, N.; Nishio, Y.; Obertelli, A.; Ohkura, A.; Orr, N. A.; Ota, S.; Otsu, H.; Ozaki, T.; Panin, V; Paschalis, S.; Pollacco, E. C.; Reichert, S.; Rousse, J-Y; Saito, A. T.; Sakaguchi, S.; Sako, M.; Santamaria, C.; Sasano, M.; Sato, H.; Shikata, M.; Shimizu, Y.; Shindo, Y.; Laszlo STUHL; Sumikama, T.; Sun, Y. L.; Tabata, M.; Togano, Y.; Tsubota, J.; Xu, F. R.; Yasuda, J.; Yoneda, K.; Zenihiro, J.; Zhou, S-G; Zuo, W.; Uesaka, T.
Publication Date
2021-02
Journal
PHYSICAL REVIEW LETTERS, v.126, no.8
Publisher
AMER PHYSICAL SOC
Abstract
A kinematically complete quasifree (p, pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus B-17, which had long been considered to have a 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 1s(1/2) percentage of 9(2)% was determined for 1s(1/2). Our finding of such a small component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in B-17. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.
URI
https://pr.ibs.re.kr/handle/8788114/10067
DOI
10.1103/PhysRevLett.126.082501
ISSN
0031-9007
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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