Two-neutron sequential decay of O-24

Authors

M. D. Jones
N. Frank
T. Baumann
J. Brett
J. Bullaro
Paul A. De YoungFollow
J. E. Finck
K. Hammerton
J. Hinnefeld
Z. Kohley
A. N. Kuchera
J. Pereira
A. Rabeh
W. Rogers
J. Smith
A. Spyrou
S. Stephenson
K. Stiefel
M. Tuttle-Timm
R. Zegers
M. Thoennessen

Document Type

Article

Publication Date

11-25-2015

Publication Source

Physical Review C

Volume Number

92

Issue Number

5

First Page

51306

ISSN

0556-2813

Abstract

A two-neutron unbound excited state of O-24 was populated through a (d, d') reaction at 83.4 MeV/nucleon. A state at E = 715 +/- 110 (stat) +/- 45 (sys) keV with a width of Gamma < 2 MeV was observed above the two-neutron separation energy placing it at 7.65 +/- 0.2 MeV with respect to the ground state. Three-body correlations for the decay of O-24 -> O-22 + 2n show clear evidence of a sequential decay through an intermediate state in O-23. Neither a di-neutron nor phase-space model for the three-body breakup were able to describe these correlations.

Keywords

Array, Isotopes, Limits, Nuclear-stability, Sweeper Magnet

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