Rotational States inNe20Excited by the ReactionO16(

Abstract

The reaction 0 16 (Li 7 ,£)Ne 20 has been studied at 16-MeV incident energy. The reaction is found to proceed essentially by a direct mechanism, exciting only those rotational bands in Ne 20 which are allowed by the selection rules in the SU(3) scheme.

α-Particle Transfer Via the (C12,Wozniak1, Harney2, Wilcox3 et al. 1972Phys. Rev. Lett.44040View full textAdd to dashboardCite

“…As in the previous case this spectrum resembles the data obtained with the fLi, /•) reaction. 15, 16 Our results are consistent with the assumption that the ( 12 C, 8 Be) reaction mainly populates two rotational bands (see Ref. 16, and references given therein): (i) the positive-parity band based on the ground state and containing the 1.63-(2 + ), 4.25-(4 + ), and 8.79-MeV (6 + ) states.…”

“…15, 16 Our results are consistent with the assumption that the ( 12 C, 8 Be) reaction mainly populates two rotational bands (see Ref. 16, and references given therein): (i) the positive-parity band based on the ground state and containing the 1.63-(2 + ), 4.25-(4 + ), and 8.79-MeV (6 + ) states. It has (sd) 4 structure, (ii) The negative-parity band containing the 5.80-(1~), 7.17-(3"), and 10.30-MeV (5~) states.…”

“…In addition to this band, we observe two strong states: (i) the peak near 11.10 MeV which is probably the 11.096-MeV (4 + ) and not the 11.08-MeV (3 + ) state, since unnatural-parity states do not seem to be populated (the 2" states at 8.87 and 12.53 MeV were not observed). This 4 + state also shows up strongly in the reactions 14 N(a,d) 16 0 and 13 C( 6 Li, /) 16 0 and therefore was suggested to have predominantly 2p-2h character (see Zisman, McClatchie, and Harvey 11 ); the 14 N( 3 He,/>) reaction, 12 however, provided evidence for a more complicated structure-possibly involving 12 Ccore excitation.…”

“…By utilizing particle-identification techniques to detect the two breakup a particles from 8 Be, we have studied the reactions 12 C( 12 C, 8 Be) 16 0 and 16 O( 12 C, 8 Be) 20 Ne. The ( 12 C, 8 Be) reaction strongly populates the positive-parity four-particle, four-hole rotational band of le O based on its 6.05-MeV (0 + ) state, and both the positive-and negative-parity rotational bands of 20 Ne based on its ground-state (0 + ) and 5.80-MeV (1") state, respectively.…”

Alpha-Particle Transfer Reactions

“…Zelenskaya et al (172) applied this to the ex transfer in the reaction 160(6Li,d) 2°Ne and emphasized that states of non zero a width should be populated preferentially. This experiment proved that states belonging to (AJ.L) = (80) classification are strongly excited (82)(83)(84) . In pursuing this scheme some of the high, strongly excited states in 2°Ne could be comprised into bands (83,155) .…”