Electron scattering studies of magnetic isovector transitions in 12C at high momentum transfer |
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Authors: | U Deutschmann G Lahm R Neuhausen JC Bergstrom |
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Institution: | Institut für Kernphysik, Universität Mainz, 6500 Mainz, Germany;Saskatchewan Accelerator Laboratory, University of Saskatchewan, Saskatoon, Canada S7N 0W0 |
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Abstract: | The inelastic electron scattering cross sections for the M1 transition to the 15.11 MeV (1+, T = 1) level and for the M2 transition to the 16.58 MeV (2?, T = 1) level in 12C have been measured in the momentum transfer region q = 0.4–3.0 fm?1, with emphasis on precise data at high momentum transfers. Additionally, a broad state near 15.4 MeV excitation has been observed and its excitation energy and natural width have been established as 15.44 ± 0.04 MeV and 1.5 ± 0.2 MeV, respectively. The Fourier-Bessel technique for determining the Mλ transition current density has been applied to the M1 and M2 transitions. Particular attention has been paid to the Coulomb corrections required to deduce the PWBA form factors. The M1 radiative width is Γγ0 = 38.5 ± 0.8 eV. |
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Keywords: | Nuclear reactions |
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