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Title: Electric Quadrupole Moments of Neutron Rich Al Isotope

Abstract

The electric quadrupole moment Q for the ground state of neutron-rich 31,32Al has been measured using {beta}-NMR method applied to spin-polarized projectile fragments. The obtained quadrupole moments are smaller than those of 27,28Al, which suggests spherical shapes of 31,32Al.

Authors:
; ; ;  [1]; ; ; ; ; ; ; ;  [2]; ;  [3]
  1. Nishina Center for Accelerator-based Science, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan)
  2. Department of Physics, Tokyo Institute of Technology, Oh-okayama 2-12-1, Meguro, Tokyo 152-8551 (Japan)
  3. Department of Physics, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima, Tokyo 171-8501 (Japan)
Publication Date:
OSTI Identifier:
21061789
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 912; Journal Issue: 1; Conference: International symposium on exotic nuclei, Khanty-Mansiysk (Russian Federation), 17-22 Jul 2006; Other Information: DOI: 10.1063/1.2746585; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALUMINIUM 27; ALUMINIUM 28; ALUMINIUM 31; ALUMINIUM 32; GROUND STATES; NUCLEAR ELECTRIC MOMENTS; NUCLEAR FRAGMENTS; NUCLEAR MAGNETIC RESONANCE; NUCLEAR STRUCTURE; QUADRUPOLE MOMENTS; SPHERICAL CONFIGURATION; SPIN ORIENTATION

Citation Formats

Yoshimi, A., Ueno, H., Kameda, D., Sugimoto, T., Asahi, K., Nagae, D., Takemura, M., Shimada, K., Takase, K., Uchida, M., Arai, T., Inoue, T., Murata, J., and Kawamura, H. Electric Quadrupole Moments of Neutron Rich Al Isotope. United States: N. p., 2007. Web. doi:10.1063/1.2746585.
Yoshimi, A., Ueno, H., Kameda, D., Sugimoto, T., Asahi, K., Nagae, D., Takemura, M., Shimada, K., Takase, K., Uchida, M., Arai, T., Inoue, T., Murata, J., & Kawamura, H. Electric Quadrupole Moments of Neutron Rich Al Isotope. United States. doi:10.1063/1.2746585.
Yoshimi, A., Ueno, H., Kameda, D., Sugimoto, T., Asahi, K., Nagae, D., Takemura, M., Shimada, K., Takase, K., Uchida, M., Arai, T., Inoue, T., Murata, J., and Kawamura, H. Tue . "Electric Quadrupole Moments of Neutron Rich Al Isotope". United States. doi:10.1063/1.2746585.
@article{osti_21061789,
title = {Electric Quadrupole Moments of Neutron Rich Al Isotope},
author = {Yoshimi, A. and Ueno, H. and Kameda, D. and Sugimoto, T. and Asahi, K. and Nagae, D. and Takemura, M. and Shimada, K. and Takase, K. and Uchida, M. and Arai, T. and Inoue, T. and Murata, J. and Kawamura, H.},
abstractNote = {The electric quadrupole moment Q for the ground state of neutron-rich 31,32Al has been measured using {beta}-NMR method applied to spin-polarized projectile fragments. The obtained quadrupole moments are smaller than those of 27,28Al, which suggests spherical shapes of 31,32Al.},
doi = {10.1063/1.2746585},
journal = {AIP Conference Proceedings},
number = 1,
volume = 912,
place = {United States},
year = {Tue May 22 00:00:00 EDT 2007},
month = {Tue May 22 00:00:00 EDT 2007}
}
  • On-line high resolution laser spectroscopy has been performed on radioactive /sup 20 -31/Na. New values for the isotope shift of the D/sub 1/ line of /sup 20-24,31/Na relative to /sup 23/Na have been obtained. The spectroscopic quadrupole moments of /sup 21,25-29/Na have been determined using a double resonance method. The D/sub 2/ line hyperfine structure of /sup 21,25-27/Na has also been studied by laser optical spectroscopy. Results are in agreement with those obtained by rf double resonance. No evidence of the sudden onset of a deformation expected at N = 20 has been found. A strong shell effect in themore » change in the mean-square charge radius is exhibited at N = 14.« less
  • The core polarization effects for the electric quadrupole moments of the neutron-rich {sup 31}Al, {sup 33}Al, and {sup 35}Al isotopes in the vicinity of the island of inversion are investigated by means of the microscopic particle-vibration coupling model in which the Skyrme Hartee-Fock-Bogoliubov and quasiparticle random-phase approximations are used to calculate the single-quasiparticle wave functions and the excitation modes. It is found that the polarization charge for the proton 1d{sub 5/2} hole state in {sup 33}Al is quite sensitive to coupling to the neutrons in the pf-shell associated with the pairing correlations and that the polarization charge in {sup 35}Almore » becomes larger due to the stronger collectivity of the low-lying quadrupole vibrational mode in the neighboring {sup 36}Si nucleus.« less
  • Nuclear magnetic resonance measurements were performed on the ground states of {sup 169}Lu, {sup 171}Lu, {sup 172}Lu, {sup 173}Lu, and {sup 177}Lu and on the 23/2{sup {minus}} isomeric state {sup 177{ital m}}Lu. The radioactive isotopes were implanted into hcp Co single crystals using the mass separator ISOLDE at CERN. For {sup 169}Lu, {sup 171}Lu, {sup 172}Lu, {sup 173}Lu, and {sup 177}Lu the quadrupole subresonance structure could be resolved well. With the magnetic hyperfine fields and the electric field gradient of Lu{ital Co}(hcp) derived from the results on {sup 177}Lu, the magnetic moments and electric quadrupole moments of {sup 169}Lu, {supmore » 171}Lu, {sup 172}Lu, and {sup 173}Lu were determined. The nuclear moments of the high-spin isomer {sup 177{ital m}}Lu were determined with a resonance-offset technique. {copyright} {ital 1996 The American Physical Society.}« less
  • Nuclear electric quadrupole moments (Q) found in the literature for the 247 keV level of /sup 111/Cd, the ground state of /sup 115/In, the 24 keV level of /sup 119/Sn, and the ground state of /sup 121/Sb are used to calculate values for electric field gradients (eq/sup n/) at the nuclear sites in a series of isoelectronic, pseudoisostructural, linear (CH/sub 3/)/sub 2/M moieties (M=Cd/sup II/, In/sup III/, Sn/sup IV/, and Sb/sup V/) whose nuclear quadrupole coupling constants (e/sup 2/q/sup n/Q) have been reported previously. Because several widely different Q values exist for each of these levels, the range of eq/supmore » n/ permitted is large and opposing conclusions about the bonding of a given system cannot be excluded. Q (/sup 119/Sn) =-0.065b is used as a reference to compare electric field gradients based on all these Q values.« less