Abstract
I develop a microscopic three-cluster model for exotic light nuclei. I use the hyperspherical formalism, associated with the generator coordinate method. This model is well adapted to halo nuclei, since the long-range part of the radial wave functions is accurately reproduced. The core wave functions are described in the shell model, including excited states. This technique provides large bases, expressed in terms of projected Slater determinants. Matrix elements involve seven-dimension integrals, and therefore require long calculation times. I apply the model to , and described by two neutrons surrounding a , and core, respectively. The (as ) and (as ) mirror nuclei are briefly discussed. I present the spectra and some spectroscopic properties, such as r.m.s. radii or transition probabilities. I also analyze the importance of core excitations.
3 More- Received 6 February 2019
DOI:https://doi.org/10.1103/PhysRevC.99.064308
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