Interplay between the 02+ resonance and the nonresonant continuum of the drip-line two-neutron halo nucleus 22C

Kazuyuki Ogata, Takayuki Myo, Takenori Furumoto, Takuma Matsumoto, Masanobu Yahiro

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15 Citations (Scopus)

Abstract

The breakup cross section (BUX) of 22C by 12C at 250 MeV/nucleon is evaluated by the continuum-discretized coupled-channels method incorporating the cluster-orbital shell model (COSM) wave functions. Contributions of the low-lying 02+ and 21+ resonances predicted by COSM to the BUX are investigated. The 21+ resonance gives a narrow peak in the BUX, as in usual resonant reactions, whereas the 02+ resonant cross section has a peculiar shape due to the coupling to the nonresonant continuum, i.e., the background-phase effect (BPE). By changing the scattering angle of 22C after the breakup, a variety of shapes of the 02+ resonant cross sections are obtained. The mechanism of the appearance of the sizable BPE in the breakup of 22C is discussed.

Original languageEnglish
Article number024616
JournalPhysical Review C - Nuclear Physics
Volume88
Issue number2
DOIs
Publication statusPublished - Aug 29 2013

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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