Precision Measurement of the Hyperfine Structure of Laser-Cooled Radioactive {sup 7}Be{sup +} Ions Produced by Projectile Fragmentation

Journal Article · Fri Nov 21 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.212502· OSTI ID:21179925

Okada, K ^[1]; Wada, M ^[2]; Nakamura, T; Takamine, A; Schury, P; Ishida, Y; Sonoda, T; Kanai, Y; Kojima, T M ^[2]; Lioubimov, V ^[2]; Ogawa, M ^[3]; Yamazaki, Y ^[2]; Yoshida, A; Kubo, T ^[4]; Katayama, I ^[5]; Ohtani, S ^[6]; Wollnik, H ^[7]; Schuessler, H A ^[8]

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1. Department of Physics, Sophia University, 7-1 Kioicho, Chiyoda, Tokyo 102-8554 (Japan)
2. Atomic Physics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
3. Graduate School of Arts and Science, The University of Tokyo, Meguro, Tokyo 153-8902 (Japan)
4. Nishina Center for Accelerator Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
5. Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)
6. Institute for Laser Science (ILS), University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585 (Japan)
7. II. Physikalisches Institut, Justus-Liebig-Universitaet Giessen, Giessen (Germany)
8. Department of Physics, Texas A and M University, College Station, Texas 77843 (United States)

The ground state hyperfine splitting of {sup 7}Be{sup +} has been measured by laser-microwave double-resonance spectroscopy in the online rf trap of RIKEN's slow RI-beam facility. Be ions produced by projectile fragmentation of {sup 13}C at {approx_equal}1 GeV were thermalized in a rf ion guide gas cell and subsequently laser cooled in the ion trap to {approx_equal}1 {mu}eV. This 10{sup 15}-fold reduction of the kinetic energy allows precision spectroscopy of these ions. A magnetic hfs constant of A=-742.772 28(43) MHz was measured for {sup 7}Be{sup +}, from which a nuclear magnetic moment of {mu}{sub I}=-1.399 28(2){mu}{sub N} was deduced.

• OSTI ID: 21179925
• Journal Information: Physical Review Letters, Vol. 101, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.101.212502; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERYLLIUM 7
BERYLLIUM 7 BEAMS
BERYLLIUM IONS
CARBON 13
GEV RANGE 01-10
GROUND STATES
HYPERFINE STRUCTURE
KINETIC ENERGY
MICROWAVE RADIATION
NUCLEAR FRAGMENTATION
NUCLEAR MAGNETIC MOMENTS
SPECTROSCOPY