Measurement of nuclear moments at RIKEN

Journal Article · Mon Feb 26 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2713507· OSTI ID:21056729

Ueno, H; Kameda, D; Yoshimi, A; Sugimoto, T; Nagatomo, T ^[1]; Nagae, D; Takemura, M; Takase, K; Arai, T; Uchida, M; Shimada, K; Inoue, T ^[2]; Asahi, K ^[2]; Murata, J; Kawamura, H; Narita, K ^[3]

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1. RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
2. Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551 (Japan)
3. Department of Physics, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima-ku, Tokyo 171-8501 (Japan)

Based on the technique of fragment-induced spin polarization combined with the {beta}-NMR method, we have recently carried out experiments at RIKEN to measure nuclear moments of neutron-rich aluminum isotopes. In the measurements, the nuclear magnetic-dipole moments of 30, 32Al and the electric-quadrupole moments of 31,32Al have been determined. The obtained magnetic moments, as well as the other known magnetic moments of aluminum isotopes, agree well with shell model calculations with the USD interaction. The obtained quadrupole moments are smaller than those of 27, 28Al, suggesting spherical shapes of 31, 32Al. These results seem to suggest that 31Al and 32Al are located outside the island of inversion. In near future, studies on nuclear moments will be extended further in the RIKEN RIBF project, in which medium- and heavy-mass regions come within our scope by using superconducting fragment separator BigRIPS. Also, an upgrade program for the existing fragment separator RIPS is in progress. In the RIBF project, nuclear moments will be measured for isomer states as well as ground states.

• OSTI ID: 21056729
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 891; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 28
ALUMINIUM 31
ALUMINIUM 32
GROUND STATES
ISOMERIC NUCLEI
JAPANESE ORGANIZATIONS
MAGNETIC DIPOLE MOMENTS
NEUTRONS
NUCLEAR DEFORMATION
NUCLEAR ELECTRIC MOMENTS
NUCLEAR FRAGMENTATION
NUCLEAR FRAGMENTS
NUCLEAR MAGNETIC MOMENTS
NUCLEAR MAGNETIC RESONANCE
QUADRUPOLE MOMENTS
SHELL MODELS
SPIN ORIENTATION