Invariant-mass spectroscopy of $^{14}$O excited states
Abstract
Excited states in O have been investigated both experimentally and theoretically. Experimentally, these states were produced via neutron-knockout reactions with a fast O beam and the invariant-mass technique was employed to isolate the 1 and 2 decay channels and determine their branching ratios. The spectrum of excited states was also calculated with the Shell Model Embedded in the Continuum that treats bound and scattering states in a unified model. By comparing energies, widths and decay branching patterns, spin and parity assignments for all experimentally observed levels below 8 MeV are made. This includes the location of the second 2 state that we find is in near degeneracy with the third 0 state. An interesting case of sequential 2 decay through a pair of degenerate N excited states with opposite parities was found where the interference between the two sequential decay pathways produces an unusual relative-angle distribution between the emitted protons.
Keywords
Cite
@article{arxiv.1910.14100,
title = {Invariant-mass spectroscopy of $^{14}$O excited states},
author = {R. J. Charity and K. W. Brown and J. Okolowicz and M. Ploszajczak and J. E. Elson and W. Reviol and L. G. Sobotka and W. W. Buhro and Z. Chajecki and W. G. Lynch and J. Manfredi and R. Shane and R. H. Showalter and M. B. Tsang and D. Weisshaar and J. R. Winkelbauer and S. Bedoor and A. H. Wuosmaa},
journal= {arXiv preprint arXiv:1910.14100},
year = {2020}
}
Comments
19 pages, 20 figures