A two-neutron halo is unveiled in $^{29}$F
Abstrak
We report the measurement of reaction cross sections ($σ_R^{\rm ex}$) of $^{27,29}$F with a carbon target at RIKEN. The unexpectedly large $σ_R^{\rm ex}$ and derived matter radius identify $^{29}$F as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the $2p_{3/2}$ orbital, thereby vanishing the shell closure associated with the neutron number $N = 20$. The results are explained by state-of-the-art shell model calculations. Coupled-cluster computations based on effective field theories of the strong nuclear force describe the matter radius of $^{27}$F but are challenged for $^{29}$F.
Penulis (47)
S. Bagchi
R. Kanungo
Y. K. Tanaka
H. Geissel
P. Doornenbal
W. Horiuchi
G. Hagen
T. Suzuki
N. Tsunoda
D. S. Ahn
H. Baba
K. Behr
F. Browne
S. Chen
M. L. Cortés
A. Estradé
N. Fukuda
M. Holl
K. Itahashi
N. Iwasa
G. R. Jansen
W. G. Jiang
S. Kaur
A. O. Macchiavelli
S. Y. Matsumoto
S. Momiyama
I. Murray
T. Nakamura
S. J. Novario
H. J. Ong
T. Otsuka
T. Papenbrock
S. Paschalis
A. Prochazka
C. Scheidenberger
P. Schrock
Y. Shimizu
D. Steppenbeck
H. Sakurai
D. Suzuki
H. Suzuki
M. Takechi
H. Takeda
S. Takeuchi
R. Taniuchi
K. Wimmer
K. Yoshida
Akses Cepat
- Tahun Terbit
- 2020
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓