Magnetic Moment of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mn>1</mn></mrow><mrow><mo>−</mo></mrow></msup></mrow></math> Ground State in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>N</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>18</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math> Measured with a New <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">β</mi></math> Level Mixing Nuclear Magnetic Resonance Technique

G. Neyens; N. Coulier; S. Teughels; G. Georgiev; B. A. Brown; W. F. Rogers; D. L. Balabanski; R. Coussement; A. Lépine-Szily; M. Lewitowicz; W. Mittig; F. de Oliveira Santos; P. Roussel-Chomaz; S. Ternier; K. Vyvey; D. Cortina-Gil

doi:10.1103/PhysRevLett.82.497

Magnetic Moment of the $1^{-}$ Ground State in ${}^{18}N$ Measured with a New $β$ Level Mixing Nuclear Magnetic Resonance Technique

G. Neyens, N. Coulier, S. Teughels, G. Georgiev, B. A. Brown, W. F. Rogers, D. L. Balabanski, R. Coussement, A. Lépine-Szily, M. Lewitowicz, W. Mittig, F. de Oliveira Santos, P. Roussel-Chomaz, S. Ternier, K. Vyvey, and D. Cortina-Gil

Phys. Rev. Lett. 82, 497 – Published 18 January 1999

Abstract

The $^{18} N$ ground state magnetic moment $| μ | = 0.135 (15) μ_{N}$ has been measured using a modified $β$ nuclear magnetic resonance technique. The value is compared to shell-model calculations. Spin-aligned $^{18} N$ projectile fragments were produced in the fragmentation of $^{22} Ne$ at 60.3 MeV/nucleon. Polarization of the nuclear spins was resonantly induced by a combined magnetic dipole, electric quadrupole, and radio frequency interaction. This is the first application of a new method that allows production of polarized nuclei from spin-aligned projectile fragments, allowing one to measure $β$ asymmetries. The method opens a new range of applications to study static dipole and quadrupole moments of exotic nuclei near the drip lines.

Received 27 August 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.497

Authors & Affiliations

G. Neyens¹, N. Coulier¹, S. Teughels¹, G. Georgiev¹, B. A. Brown^2,3, W. F. Rogers⁴, D. L. Balabanski^1,*, R. Coussement¹, A. Lépine-Szily⁵, M. Lewitowicz⁶, W. Mittig⁶, F. de Oliveira Santos⁶, P. Roussel-Chomaz⁶, S. Ternier¹, K. Vyvey¹, and D. Cortina-Gil⁷

¹University of Leuven, Instituut voor Kern-en Stralingsfysika, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
²Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
³Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
⁴Westmont College, 955 La Paz Road, Santa Barbara, California 93108
⁵Institute of Physics, University of Sao Paulo, C.P. 66318, 05389-970 Sao Paulo, Brazil
⁶Grand Accelerateur National d'Ions Lourds, B.P. 5027, F-14076 Caen Cedex 5, France
⁷Gesellschaft fur Schwerionenforschung, D–64291 Darmstadt, Germany