Shell-model study of spin-dipole strength in 12C and 16O

Details Shell-model study of spin-dipole strength in 12C and 16O Shell-model study of spin-dipole strength in 12C and 16O

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nupha.637..547s&link_type=abstract

Nuclear Physics A, Volume 637, Issue 4, p. 547-558.

Physics

Nuclear Physics

9

Shell Model, Spin-Dipole State, Giant-Dipole State

Scientific paper

We have studied effects of tensor correlations and couplings to 3ℏω excitations on the quenching of spin-dipole strengths in 12C and 16O by large scale shell model calculations. We found that the transition strengths in the energy range Ex =(20-40) MeV in 12C are quenched by about 20% due to the coupling to the 3ℏω configuration space, and by additional 10% due to the tensor interaction. There is also a similar quenching of spin-dipole strengths for 1- states in 16O. The calculated results are compared with available experimental data of spin-dipole states observed by charge exchange (p,n) and (d-->, 2He) reactions on 12C. An astrophysical implication of spin-dipole strengths in 16O for detections of supernova neutrinos is also discussed.

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