Nuclear moments of the low-lying isomeric 1(+) state of Al-34: Investigation on the neutron 1p1h excitation across N=20 in the island of inversion
| Autor: | Takaharu Otsuka, W. Gins, M. Lykiardopoulou, O. Kamalou, T. Sato, T. J. Mertzimekis, J. C. Thomas, R. Orset, Marine Vandebrouck, Koichiro Asahi, Xiaofei Yang, Yutaka Utsuno, R. P. de Groote, Alfredo Poves, H. Heylen, Gerda Neyens, C. Stodel, Naofumi Tsunoda, J. M. Daugas, Hiroki Nishibata, F. Boulay, Ziye Xu, Á. Koszorús |
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| Přispěvatelé: | Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
β-NMR/NQR
Nuclear reaction Nuclear and High Energy Physics beta-NMR/NQR Nuclear Theory [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] Astronomy & Astrophysics 01 natural sciences INELASTIC-SCATTERING Quadrupole moment Physics Particles & Fields g factor DEFORMATION [formula omitted]Al 0103 physical sciences Nuclear Physics - Experiment Neutron β -NMR/NQR 010306 general physics Nuclear Experiment ELECTRIC QUADRUPOLE-MOMENT Physics Science & Technology STABILITY 010308 nuclear & particles physics Island of inversion 34m Al Resonance SHELL CLOSURE lcsh:QC1-999 MAGNETIC-MOMENTS Physics Nuclear SPIN GROUND-STATE Quadrupole Physical Sciences COLLECTIVITY Al-34m Atomic physics Nucleon Isotopes of beryllium lcsh:Physics Dimensionless quantity |
| Zdroj: | Phys.Lett.B Phys.Lett.B, 2018, 782, pp.619-626. ⟨10.1016/j.physletb.2018.06.009⟩ Physics Letters B Physics Letters B, Elsevier, 2018, 782, pp.619-626. ⟨10.1016/j.physletb.2018.06.009⟩ Physics Letters B, Vol 782, Iss, Pp 619-626 (2018) |
| ISSN: | 0370-2693 |
| Popis: | The nuclear g factor and quadrupole moment ( Q s ) have been measured for the low-lying isomeric 1 + state of 34Al, using the β-detected nuclear magnetic resonance (β-NMR) and quadrupole resonance (β-NQR) methods. Spin-polarized 34Al isotopes were produced in a one-neutron pickup reaction induced by a 36S beam on a 9Be target at a kinetic energy of 77.5 MeV/nucleon, and were collected with the LISE fragment separator at GANIL. The measured g factor ( | g | in a range of 1.757 ± 0.014 ) and quadrupole moment ( | Q s | = 38 ( 5 ) mb) are in good agreement with shell-model calculations using effective interactions. The similarity between the g factor of 34 m Al and that of 32Al confirms a dominant neutron 2 p 1 h configuration π ( d 5 / 2 ) − 1 ⊗ ν ( d 3 / 2 ) − 1 ( f 7 / 2 ) 2 of 34 m Al. In addition, the enhanced quadrupole moment of 34 m Al relative to that of 32Al suggests that the neutron 1 p 1 h excitation across the N = 20 shell gap introduces extra nucleon–nucleon correlation and deformation. |
| Databáze: | OpenAIRE |
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