Electroexcitation ofM4transitions inO17andO

Abstract

at excitation energies between 1S and 23 MeV. Measurements were performed at 90' for momentum transfers of 1.4, 1.S, 1.7, and 1.9 fm ' and at 160' for a momentum transfer of 1.7 fm '. Several prominent narrow peaks were observed in the spectra of both nuclei. The measured form factors for levels in '~O at 1S.78, 17.06, 20.14, and 20.70 MeV and in "0 at 18.70, 20.36, and 22.39 MeV are, within experimental uncertainties, completely transverse. These strongly excited states are assumed to arise from isovector M4 transitions of the type 1@3&2~1d5q2. A simple weak-coup1ing model is used to assign spins to the levels in ' O. Finally, we also report measurements for several narrow states in both nuclei, for which the spins and parities have not yet been identified.

The effect of short range correlation on the inelastic C2 and C4 form factors of 18O nucleus

“…This is attributed to the fact that the introduction of SRC leads to enlarge the relative distance of the nucleons (i.e., the size of the nucleus) whereas the parameter b (which is proportional to the radius of the nucleus) should become smaller so as to reproduce the experimental rms charge radius of the O 18 . [33], [34] and [35]. In Fig.…”