Abstract
We measured the -ray angular distribution from to the ground state of using a pulsed beam at and MeV. True events of were discriminated from background events with a time-of-flight method because of neutrons from (). The obtained -ray spectrum with anti-Compton NaI(Tl) spectrometers showed a characteristic line shape from : the Doppler broadening and energy loss of particles in targets. A Rutherford backscattering spectrum of particles from enriched targets was measured during beam irradiation to obtain the target thickness and incident -beam intensities. The astrophysical factors for and and , derived from the present cross sections are in excellent agreement with the values derived by -matrix calculation of the -delayed spectrum of , and by using the asymptotic normalization constant in the -matrix fit.
8 More- Received 3 February 2009
DOI:https://doi.org/10.1103/PhysRevC.80.065802
©2009 American Physical Society