Abstract
The magnetic moment and electric quadrupole moment of a neutron-rich nucleus 18N have been determined by the β-NMR method, taking advantage of the fragment spin polarization induced in the intermediate-energy projectile fragmentation reaction. To assure the existence of a sufficient polarization prior to the resonance search, a scheme of polarization measurement by means of an adiabatic field rotation has been developed and successfully incorporated in the β-NMR experiment. From the observed resonance in a R stopper the magnetic moment for the 18N ground state has been determined to be | μ| = 0.3279 ± 0.0013μN. The 18N fragments have also been implanted in a single crystal Mg stopper, and from the observed quadrupole frequency |eqQ/h| = 73.2 ± 1.4 kHz, the electric quadrupole moment |Q| = 12.3 ± 1.2 mb has been deduced. The obtained μ and Q are compared with shell model calculations.
Original language | English |
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Pages (from-to) | 11-18 |
Number of pages | 8 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 451 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1999 |
Externally published | Yes |
Keywords
- Effective charge
- Electric quadrupole moment
- Magnetic moment
- N ground state
- Neutron-rich nucle
- Projectile fragmentation
- Shell model
- Spin polarization
- β-NMR
ASJC Scopus subject areas
- Nuclear and High Energy Physics