Structure and decay correlations of two-neutron systems beyond the dripline

Kohley, Z.; Baumann, T.; Bazin, D.; Christian, G.; De Young, P. A.; Finck, J. E.; Haring-Kaye, R. A.; Hinnefeld, J.; Frank, N.; Lunderberg, E.; Luther, B.; Mosby, S.; Peters, W. A.; Smith, J. K.; Snyder, J.; Stephenson, S. L.; Strongman, M. J.; Spyrou, A.; Thoennessen, M.; Volya, A.

doi:10.1088/1742-6596/569/1/012033

Title: Structure and decay correlations of two-neutron systems beyond the dripline

Journal Article · Mon Dec 08 00:00:00 EST 2014 · Journal of Physics. Conference Series

DOI:https://doi.org/10.1088/1742-6596/569/1/012033· OSTI ID:1454784

Kohley, Z. ^[1]; Baumann, T. ^[2]; Bazin, D. ^[2]; Christian, G. ^[3]; De Young, P. A. ^[4]; Finck, J. E. ^[5]; Haring-Kaye, R. A. ^[6]; Hinnefeld, J. ^[7]; Frank, N. ^[8]; Lunderberg, E. ^[4]; Luther, B. ^[9]; Mosby, S. ^[3]; Peters, W. A. ^[3]; Smith, J. K. ^[3]; Snyder, J. ^[3]; Stephenson, S. L. ^[10]; Strongman, M. J. ^[3]; Spyrou, A. ^[3]; Thoennessen, M. ^[3]; Volya, A. ^[11]

Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Dept. of Chemistry
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
Hope College, Holland, MI (United States). Dept. of Physics
Central Michigan Univ., Mount Pleasant, MI (United States). Dept. of Physics
Ohio Wesleyan Univ., Delaware, OH (United States). Dept. of Physics and Astronomy
Indiana Univ., South Bend, IN (United States). Dept. of Physics and Astronomy
Augustana College, Rock Island, IL (United States). Dept. of Physics & Astronomy
Concordia College, Moorhead, MN (United States). Dept. of Physics
Gettysburg College, Gettysburg, PA (United States). Dept. of Physics
Florida State Univ., Tallahassee, FL (United States). Dept. of Physics

The two-neutron unbound systems of ¹⁶Be, ¹³Li, ¹⁰He, and ²⁶O have been measured using the Modular Neutron Array (MoNA) and 4 Tm Sweeper magnet setup. The correlations of the 3-body decay for the ¹⁶Be and ¹³Li were extracted and demonstrated a strong correlated enhancement between the two neutrons. The measurement of the ¹⁰He ground state resonance from a ¹⁴Be(-2p2n) reaction provided insight into previous predictions that wavefunction of the entrance channel, projectile, can influence the observed decay energy spectrum for the unbound system. Lastly, the decay-in-target (DiT) technique was utilized to extract the lifetime of the ²⁶O ground state. The measured lifetime of 4.5$$+1.1\atop{-1.5}$$ (stat.)±3(sys.) ps provides the first indication of two-neutron radioactivity.