β-delayed neutron emission studies of i 137,138 and Cs 144,145 performed with trapped ions

Authors

A. Czeszumska, Lawrence Livermore National Laboratory
N. D. Scielzo, Lawrence Livermore National Laboratory
S. A. Caldwell, Argonne National Laboratory
J. A. Clark, Argonne National Laboratory
G. Savard, Argonne National Laboratory
B. S. Wang, Lawrence Livermore National Laboratory
A. Aprahamian, University of Notre Dame
M. T. Burkey, Argonne National Laboratory
C. J. Chiara, Argonne National Laboratory
J. Harker, Argonne National Laboratory
A. F. Levand, Argonne National Laboratory
S. T. Marley, University of Notre Dame
G. Morgan, University of Manitoba
J. M. Munson, University of California, Berkeley
E. B. Norman, University of California, Berkeley
A. Nystrom, University of Notre Dame
R. Orford, Argonne National Laboratory
S. W. Padgett, Lawrence Livermore National Laboratory
A. Pérez Galván, Argonne National Laboratory
K. S. Sharma, University of Manitoba
K. Siegl, University of Notre Dame
S. Y. Strauss, University of Notre Dame

Document Type

Article

Publication Date

2-1-2020

Abstract

A detailed study of the β-delayed neutron emission properties of I137,138 and Cs144,145 has been performed by confining ions in the Beta-decay Paul Trap. The daughter ions following β decay emerge from the trapped-ion cloud with negligible scattering allowing reconstruction of the recoil-ion energy from the time of flight. From this information, the neutron-emission branching ratios and neutron-energy spectra were deduced. The results for the I137 and Cs144,145 decays are in agreement with previous results performed using direct neutron-detection techniques. In the case of I138, a branching ratio of 6.18(50)% is obtained, yielding a value consistent with the more recent results, which are a factor of two larger than measurements made prior to 1978.

Publication Source (Journal or Book title)

Physical Review C

Recommended Citation

Czeszumska, A., Scielzo, N., Caldwell, S., Clark, J., Savard, G., Wang, B., Aprahamian, A., Burkey, M., Chiara, C., Harker, J., Levand, A., Marley, S., Morgan, G., Munson, J., Norman, E., Nystrom, A., Orford, R., Padgett, S., Pérez Galván, A., Sharma, K., Siegl, K., & Strauss, S. (2020). β-delayed neutron emission studies of i 137,138 and Cs 144,145 performed with trapped ions. Physical Review C, 101 (2) https://doi.org/10.1103/PhysRevC.101.024312