| Published Articles | |
| Title | Nuclear moments of the low-lying isomeric 1$^+$ state of $^{34}$Al: Investigation on the neutron 1$p$1$h$ excitation across $N=20$ in the island of inversion |
| Author(s) | Xu, Z Y (Leuven U.) ; Heylen, H (Leuven U. ; CERN ; Heidelberg, Max Planck Inst.) ; Asahi, K (Nishina Ctr., RIKEN ; Tokyo Inst. Tech.) ; Boulay, F (CEA DAM) ; Daugas, J M (CEA DAM) ; de Groote, R P (Leuven U.) ; Gins, W (Leuven U.) ; Kamalou, O (GANIL) ; Koszorús, Á (Leuven U.) ; Lykiardopoulou, M (Athens U.) ; Mertzimekis, T J (Athens U.) ; Neyens, G (Leuven U. ; CERN) ; Nishibata, H (Nishina Ctr., RIKEN) ; Otsuka, T (Tokyo U., CNS ; Tokyo U. ; Michigan State U., NSCL ; Leuven U.) ; Orset, R (CEA DAM) ; Poves, A (Madrid, Autonoma U. ; Madrid, IFT) ; Sato, T (Nishina Ctr., RIKEN) ; Stodel, C (GANIL) ; Thomas, J C (GANIL) ; Tsunoda, N (Tokyo U., CNS) ; Utsuno, Y (JAEA, Ibaraki ; Tokyo U., CNS) ; Vandebrouck, M (GANIL ; IRFU, Saclay) ; Yang, X F (Leuven U.) |
| Publication | 2018 |
| Number of pages | 8 |
| In: | Phys. Lett. B 782 (2018) 619-626 |
| DOI | 10.1016/j.physletb.2018.06.009 |
| Subject category | Nuclear Physics - Experiment |
| Abstract | The nuclear $g$ factor and quadrupole moment ($Q_s$) have been measured for the low-lying isomeric $1^+$ state of $^{34}$Al, using the $\beta$-detected nuclear magnetic resonance ($\beta$-NMR) and quadrupole resonance ($\beta$-NQR) methods. Spin-polarized $^{34}$Al isotopes were produced in a one-neutron pickup reaction induced by a $^{36}$S beam on a $^9$Be target at a kinetic energy of 77.5 MeV/nucleon, and were collected with the LISE fragment separator at GANIL. The measured $g$ factor ($\lvert g \rvert$ in a range of $1.757 \pm 0.014$) and quadrupole moment ($\lvert Q_s \rvert =38(5)$ mb) are in good agreement with shell-model calculations using effective interactions. The similarity between the $g$ factor of $^{34m}$Al and that of $^{32}$ Al confirms a dominant neutron $2p1h$ configuration $\pi (d_{5/2})^{-1} \otimes \nu(d_{3/2})^{−1}(f_{7/2})^2$ of $^{34m}$Al. In addition, the enhanced quadrupole moment of $^{34m}$Al relative to that of $^{32}$Al suggests that the neutron $1p1h$ excitation across the $N=20$ shell gap introduces extra nucleon–nucleon correlation and deformation. |
| Copyright/License | publication: (License: CC-BY-4.0) The Author(s) |
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Element opprettet 2019-03-19, sist endret 2021-05-03
