English

Independent measurement of the Hoyle state $\beta$ feeding from 12B using Gammasphere

Nuclear Experiment 2016-06-22 v2

Abstract

Using an array of high-purity Compton-suppressed germanium detectors, we performed an independent measurement of the β\beta-decay branching ratio from 12B^{12}\mathrm{B} to the second-excited (Hoyle) state in 12C^{12}\mathrm{C}. Our result is 0.64(11)%0.64(11)\%, which is a factor 2\sim 2 smaller than the previously established literature value, but is in agreement with another recent measurement. This could indicate that the Hoyle state is more clustered than previously believed. The angular correlation of the Hoyle state γ\gamma cascade has also been measured for the first time. It is consistent with theoretical predictions.

Keywords

Cite

@article{arxiv.1601.02853,
  title  = {Independent measurement of the Hoyle state $\beta$ feeding from 12B using Gammasphere},
  author = {M. Munch and M. Alcorta and H. O. U. Fynbo and M. Albers and S. Almaraz-Calderon and M. L. Avila and A. D. Ayangeakaa and B. B. Back and P. F. Bertone and P. F. F. Carnelli and M. P. Carpenter and C. J. Chiara and J. A. Clark and B. DiGiovine and J. P. Greene and J. L. Harker and C. R. Hoffman and N. J. Hubbard and C. L. Jiang and O. S. Kirsebom and T. Lauritsen and K. L. Laursen and S. T. Marley and C. Nair and O. Nusair and D. Santiago-Gonzalez and J. Sethi and D. Seweryniak and R. Talwar and C. Ugalde and S. Zhu},
  journal= {arXiv preprint arXiv:1601.02853},
  year   = {2016}
}