Nuclear polarization of short-lived Na isotopes maintained in single crystals for beta-NMR spectroscopy

作者：Minamisono K^*; Matsuta K; Minamisono T; Levy C D P; Nagatomo T; Ogura M; Sumikama T; Behr J A; Jackson K P; Mihara M; Fukuda M

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2010, 616(1): 45-54.

DOI：10.1016/j.nima.2010.02.101

• Nuclear polarization
• Optical pumping
• beta NMR
• Nuclear-spin lattice relaxation time
• Electromagnetic nuclear moment

A compact beta-ray detecting nuclear magnetic/quadrupole resonance system with a permanent magnet was developed at ISAC/TRIUMF to measure ground-state electromagnetic moments of short-lived nuclei. Polarized Na beams produced using the collinear optical-pumping technique were used to demonstrate the properties of the system. The degree of nuclear polarization and the spin-lattice relaxation times of the (20,21,26,27,28)Na isotopes in NaF, TiO(2), LiNbO(3), MgF(2), ZnO, Pt, and Mg single crystals at room temperature are reported. The electric-quadrupole coupling constants of (20,21)Na in TiO(2), ZnO and Mg, and that of (27)Na in ZnO are also reported. The quadrupole moments of (20,21)Na were extracted from the electric-quadrupole coupling constants in ZnO, using the known quadrupole moment of (27)Na.

• 出版日期2010-4-21