The neutron long counter NERO for studies of beta-delayed neutron emission in the r-process
nucl-ex
/ Authors
J. Pereira, P. Hosmer, G. Lorusso, P. Santi, A. Couture, J. Daly, M. Del Santo, T. Elliot, J. Goerres, C. Herlitzius
and 16 more authors
K. -L. Kratz, L. O. Lamm, H. Y. Lee, F. Montes, M. Ouellette, E. Pellegrini, P. Reeder, H. Schatz, F. Schertz, L. Schnorrenberger, K. Smith, E. Stech, E. Strandberg, C. Ugalde, M. Wiescher, A. Woehr
/ Abstract
The neutron long counter NERO was built at the National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, for measuring beta-delayed neutron-emission probabilities. The detector was designed to work in conjunction with a beta-decay implantation station, so that beta decays and beta-delayed neutrons emitted from implanted nuclei can be measured simultaneously. The high efficiency of about 40%, for the range of energies of interest, along with the small background, are crucial for measuring beta-delayed neutron emission branchings for neutron-rich r-process nuclei produced as low intensity fragmentation beams in in-flight separator facilities.