Academic Journal
Mass, spectroscopy and two-neutron decay of $^{16}$Be
| العنوان: | Mass, spectroscopy and two-neutron decay of $^{16}$Be |
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| المؤلفون: | Monteagudo, B, Marqués, F.M, Gibelin, J, Orr, N.A, Corsi, A, Kubota, Y, Casal, J, Gómez-Camacho, J, Authelet, G, Baba, H, Caesar, C, Calvet, D, Delbart, A, Dozono, M, Feng, J, Flavigny, F, Gheller, J.-M, Giganon, A, Gillibert, A, Hasegawa, K, Isobe, T, Kanaya, Y, Kawakami, S, Kim, D, Kiyokawa, Y, Kobayashi, M, Kobayashi, N, Kobayashi, T, Kondo, Y, Korkulu, Z, Koyama, S, Lapoux, V, Maeda, Y, Motobayashi, T, Miyazaki, T, Nakamura, T, Nakatsuka, N, Nishio, Y, Obertelli, A, Ohkura, 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, Stuhl, L, Sumikama, T, Sun, Y.L, Tabata, M, Togano, Y, Tsubota, J, Uesaka, T, Yang, Z.H, Yasuda, J, Yoneda, K, Zenihiro, J |
| المساهمون: | Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 0031-9007. |
| بيانات النشر: | HAL CCSD American Physical Society |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] |
| الوصف: | International audience ; The structure and decay of the most neutron-rich beryllium isotope, $^{16}$Be, has been investigated following proton knockout from a high-energy $^{17}$B beam. Two relatively narrow resonances were observed for the first time, with energies of $0.84(3)$ and $2.15(5)$ MeV above the two-neutron decay threshold and widths of $0.32(8)$ and $0.95(15)$ MeV respectively. These were assigned to be the ground ($J^{\pi}=0^+$) and first excited ($2^+$) state, with $E_x=1.31(6)$ MeV. The mass excess of $^{16}$Be was thus deduced to be $56.93(13)$ MeV, some $0.5$ MeV more bound than the only previous measurement. Both states were observed to decay by direct two-neutron emission. Calculations incorporating the evolution of the wavefunction during the decay as a genuine three-body process reproduced the principal characteristics of the neutron-neutron energy spectra for both levels, indicating that the ground state exhibits a strong spatially compact dineutron component, while the 2$^+$ level presents a far more diffuse neutron-neutron distribution. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/2401.16817; hal-04446827; https://hal.science/hal-04446827; ARXIV: 2401.16817; INSPIRE: 2753126 |
| DOI: | 10.1103/PhysRevLett.132.082501 |
| الاتاحة: | https://hal.science/hal-04446827 https://doi.org/10.1103/PhysRevLett.132.082501 |
| رقم الانضمام: | edsbas.E1731778 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevLett.132.082501 |
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