John R. Erskine

A high-resolution study of the 40Ca(16O, 12C)44Ti reaction☆

Abstract High-resolution measurements of the α-particle transfer reaction 40 Ca( 16 O, 12 C) 44 Ti have been performed utilizing a split-pole magnetic spectrograph. Comparison with 40 Ca( 6 Li,d) 44 Ti data reveals close agreement for the relative selectivity of final states in the two transfer reactions. No evidence is found for α-particle breakup of 16 O or population of the 4.43 MeV first excited state of 12 C.

Spin determination from angular structure of p12 proton transfer in the 48Ca(15N, 14C)49Sc reaction☆

Abstract The angular momentum selection rules for the transfer of p 1 2 nucleon to j > and j final states, and the recently observed angular L -dependence in heavy-ion transfer reactions can be used to determine final-state spins. This is shown for the reaction 48 Ca( 15 N, 14 C) 49 Sc.

4+ and 6+ core-excited states in 20Ne

Abstract Selective population of the 4 + and 6 + states at E x = 9.04 and 12.16 MeV, respectively, in the 12 C( 12 C,α 20 Ne reaction identifies those states as the 4 + and 6 + members of the first K π = 0 + core-excited band, whose lower members are the 0 + state at 7.20 MeV and the 2 + state at 7.83 MeV.

l determinations for 12C + 12C☆

Abstract Detailed angular-distribution measurements and Legendre-polynomial fits for 12 C ( 12 C , α 0 ) 20 Ne ( g.s ) in the bombardi energy region of the so-called “12 + ” bump in 12 C + 12 C inelastic scattering show conclusively that l = 10 dominates the α 0 exit channel throughout the range, except near the narrow 12 + resonance that was previously known.