Ground-state magnetic moment of the T=1 nucleus ³²Cl using on-line β-NMR spectroscopy

The magnetic dipole moment of the 1⁺ ground state of the T=1 nucleus ₁₇³²Cl₁₅ has been measured to be μ=1.114(6)μ_N using conventional β-NMR spectroscopy. Polarized ³²Cl nuclei were produced by fragmentation of a 100 MeV/nucleon ³⁶Ar beam in a 642 mg/cm^{2 93}Nb target, where the beam was incident on the target at an angle 2.5° to the normal beam axis. The desired ³²Cl fragments were filtered from other fragmentation products using the A1200 fragment separator and implanted in a NaCl single crystal, maintained at room temperature, at the center of a β-NMR apparatus. The Larmor frequency was determined by measuring the β-decay asymmetry as a function of the applied radio-frequency field. Isoscalar and isovector moments for the A=32, T=1 isospin multiplet are extracted and compared with large-basis shell model calculations.