53 research outputs found

    Large enhancement of the sub-barrier fusion probability for a halo nucleus

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    The fusion-fission cross sections of the He-4 + U-238 and He-6 + U-238 systems have been measured, at Louvain-la-Neuve, for energies around and below the Coulomb barrier, using an array of Si detectors surrounding a UF4 target. The data taken with 4He are in good agreement with previous data and with the coupled channel fusion calculation performed with ECIS. The He-6 data show a regular trend with a large enhancement below the barrier which is attributed to the halo structure of the He-6 nucleus

    Study of the static quadrupole moment of the K=35/2 isomer in W-179

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    The quadrupole interaction frequency of the high-K five-quasiparticle isomer in W-179 implanted in a Tl host at a temperature of 473 K has been determined using the LEMS method. A value of 65.7(7.5) MHz has been found
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