Abstract
The excited states in have been investigated by the resonant elastic scattering of . A 4.0 MeV/nucleon beam was separated by the Center for Nuclear Study (CNS) radioactive ion beam separator (CRIB) and then used to bombard a thick (CH) target. The energy spectra of recoiled protons were measured at scattering angles of , and , respectively. A wide energy-range of excitation function in (up to MeV) was obtained simultaneously with a thick-target method, and a state at 7.06 MeV was newly observed. The resonant parameters were deduced from an -matrix analysis of the center-of-mass (c.m.) differential cross-section data with a SAMMY-M6-BETA code. The astrophysical resonant reaction rate for the () reaction was recalculated based on the present parameters. Generally speaking, the present rates are much smaller than the previous ones.
- Received 18 January 2009
DOI:https://doi.org/10.1103/PhysRevC.80.015801
©2009 American Physical Society