One-step energy scanning of wide low-lying 1/sup -/ resonances in /sup 13/C+p and /sup 13/N+p scattering
(1992) Nuclear Physics, Section A — Vol. A542, n° 2, p. 263-277 (1992)
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- Abstract
- Thick polyethylene targets have been bombarded with 8.2 MeV /sup 13/C and /sup 13/N beams accelerated by a cyclotron, i.e. having a relatively large energy spread of about 200 keV. Recoil protons have been detected in order to observe the /b J//sup pi /=1/sup -/ wide resonances at /b E/*=8.06 and 5.17 MeV in the /sup 14/N and /sup 14/O compound nuclei, respectively. It is shown that accurate values of the energy, width and spin of the resonant states can be obtained under experimental conditions which, at first glance, may seem inappropriate. The method is well suited for resonance studies using radioactive beams. The measured width of the /sup 14/N resonance ( Gamma =33.7+/-1.0 keV) disagrees with a recent measurement ( Gamma =23 keV). The energy of the /sup 14/O resonance was determined to be /b E//sub c.m./=526+/-3 keV instead of 545+/-10 keV as quoted in the literature. A new parameter-free microscopic calculation was undertaken to solve an apparent discrepancy between the experimental proton width and a previous calculation.
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Delbar, T., Galster, W., Leleux, P., Lienard, E., Lipnik, P., Michotte, C., Vervier, J., Duhamel, P., Vanhorenbeeck, J., Decrock, P., Huyse, M., Van Duppen, P., Baye, D., & Descouvemont, P. (1992). One-step energy scanning of wide low-lying 1/sup -/ resonances in /sup 13/C+p and /sup 13/N+p scattering. Nuclear Physics, Section A, A542(2), 263-277. https://hdl.handle.net/2078.5/85356 (Original work published 1992)