Extraction of anti-analog giant dipole resonance and neutron skin thickness for 208Pb

The anti-analog giant dipole resonance (AGDR) was separated from other excitations such as the spin-dipole resonance by multipole decomposition analysis of the reaction at a bombarding energy of . The polarization transfer observables were found to be useful for carrying out this separation. The ene...

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Bibliographic Details
Published in:Progress of theoretical and experimental physics 2013-06, Vol.2013 (6)
Main Authors: Yasuda, Jumpei, Wakasa, Tomotsugu, Okamoto, Midori, Dozono, Masanori, Hatanaka, Kichiji, Ichimura, Munetake, Kuroita, Sho, Maeda, Yukie, Noro, Tetsuo, Sakemi, Yasuhiro, Sasano, Masaki, Yako, Kentaro
Format: Article
Language:English
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Summary:The anti-analog giant dipole resonance (AGDR) was separated from other excitations such as the spin-dipole resonance by multipole decomposition analysis of the reaction at a bombarding energy of . The polarization transfer observables were found to be useful for carrying out this separation. The energy difference between the AGDR and the isobaric analog state (IAS) was determined to be ΔE = 8.69 ± 0.36 MeV, where the uncertainty includes both statistical and systematic contributions. Theoretical calculations using the proton-neutron relativistic quasi-particle random phase approximation predicted a strong correlation between and the neutron skin thickness . Under the assumption that the correlation predicted in this model is correct, the present value corresponds to a neutron skin thickness of , where the first and second uncertainties are the experimental and theoretical uncertainties, respectively.
ISSN:2050-3911
2050-3911
DOI:10.1093/ptep/ptt038