- Revel, A
- Sorlin, O
- Marqués, FM
- Kondo, Y
- Kahlbow, J
- Nakamura, T
- Orr, NA
- Nowacki, F
- Tostevin, JA
- Yuan, CX
- Achouri, NL
- Al Falou, H
- Atar, L
- Aumann, T
- Baba, H
- Boretzky, K
- Caesar, C
- Calvet, D
- Chae, H
- Chiga, N
- Corsi, A
- Crawford, HL
- Delaunay, F
- Delbart, A
- Deshayes, Q
- Dombrádi, Z
- Douma, CA
- Elekes, Z
- Fallon, P
- Gašparić, I
- Gheller, J-M
- Gibelin, J
- Gillibert, A
- Harakeh, MN
- He, W
- Hirayama, A
- Hoffman, CR
- Holl, M
- Horvat, A
- Horváth, Á
- Hwang, JW
- Isobe, T
- Kalantar-Nayestanaki, N
- Kawase, S
- Kim, S
- Kisamori, K
- Kobayashi, T
- Körper, D
- Koyama, S
- Kuti, I
- Lapoux, V
- Lindberg, S
- Masuoka, S
- Mayer, J
- Miki, K
- Murakami, T
- Najafi, M
- Nakano, K
- Nakatsuka, N
- Nilsson, T
- Obertelli, A
- de Oliveira Santos, F
- Otsu, H
- Ozaki, T
- Panin, V
- Paschalis, S
- Rossi, D
- Saito, AT
- Saito, T
- Sasano, M
- Sato, H
- Satou, Y
- Scheit, H
- Schindler, F
- Schrock, P
- Shikata, M
- Shimizu, Y
- Simon, H
- Sohler, D
- Stuhl, L
- Takeuchi, S
- Tanaka, M
- Thoennessen, M
- Törnqvist, H
- Togano, Y
- Tomai, T
- Tscheuschner, J
- Tsubota, J
- Uesaka, T
- Yang, Z
- Yasuda, M
- Yoneda, K
- SAMURAI21 collaboration
- et al.
Detailed spectroscopy of the neutron-unbound nucleus ^{28}F has been performed for the first time following proton/neutron removal from ^{29}Ne/^{29}F beams at energies around 230 MeV/nucleon. The invariant-mass spectra were reconstructed for both the ^{27}F^{(*)}+n and ^{26}F^{(*)}+2n coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the ^{28}F ground state, with S_{n}(^{28}F)=-199(6) keV, while analysis of the 2n decay channel allowed a considerably improved S_{n}(^{27}F)=1620(60) keV to be deduced. Comparison with shell-model predictions and eikonal-model reaction calculations have allowed spin-parity assignments to be proposed for some of the lower-lying levels of ^{28}F. Importantly, in the case of the ground state, the reconstructed ^{27}F+n momentum distribution following neutron removal from ^{29}F indicates that it arises mainly from the 1p_{3/2} neutron intruder configuration. This demonstrates that the island of inversion around N=20 includes ^{28}F, and most probably ^{29}F, and suggests that ^{28}O is not doubly magic.