Two-neutron sequential decay of O24

Jones, M. D.; Frank, N.; Baumann, T.; Brett, J.; Bullaro, J.; DeYoung, P. A.; Finck, J. E.; Hammerton, K.; Hinnefeld, J.; Kohley, Z.; Kuchera, A. N.; Pereira, J.; Rabeh, A.; Rogers, W. F.; Smith, J. K.; Spyrou, A.; Stephenson, S. L.; Stiefel, K.; Tuttle-Timm, M.; Zegers, R. G.  T.; Thoennessen, M.

doi:10.1103/PhysRevC.92.051306

Title: Two-neutron sequential decay of ${}^{24}O$

Abstract

In this study, a two-neutron unbound excited state of ²⁴O 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 Γ<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 ²⁴O → ²²O + 2n show clear evidence for a sequential decay through an intermediate state in ²³O. Neither a di-neutron nor phase-space model for the three-body breakup were able to describe these correlations.

Authors:

Jones, M. D. ^[1]; Frank, N. ^[2]; Baumann, T. ^[3]; Brett, J. ^[4]; Bullaro, J. ^[2]; DeYoung, P. A. ^[4]; Finck, J. E. ^[5]; Hammerton, K. ^[6]; Hinnefeld, J. ^[7]; Kohley, Z. ^[6]; Kuchera, A. N. ^[3]; Pereira, J. ^[3]; Rabeh, A. ^[2]; Rogers, W. F. ^[8]; Smith, J. K. ^[1]; Spyrou, A. ^[1]; Stephenson, S. L. ^[9]; Stiefel, K. ^[6]; Tuttle-Timm, M. ^[2]; Zegers, R. G. T. ^[10] more »

Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy
Augustana College, Rock Island, IL (United States)
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
Hope College, Holland, MI (United States). Department of Physics
Central Michigan University, Mount Pleasant, MI (United States). Department of Physics
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Chemistry
Indiana University South Bend, IN (United States). Department of Physics and Astronomy
Westmont College, Santa Barbara, CA (United States). Department of Physics
Gettysburg College, PA (United States). Department of Physics
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory, Department of Physics and Astronomy and Joint Institute for Nuclear Astrophysics – Center for the Evolution of the Elements

Publication Date:: Wed Nov 25 00:00:00 EST 2015

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States). Nuclear Science and Security Consortium

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1454772

Alternate Identifier(s):: OSTI ID: 1227080

Grant/Contract Number:: NA0000979

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C, Nuclear Physics

Additional Journal Information:: Journal Volume: 92; Journal Issue: 5; Journal ID: ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Jones, M. D., Frank, N., Baumann, T., Brett, J., Bullaro, J., DeYoung, P. A., Finck, J. E., Hammerton, K., Hinnefeld, J., Kohley, Z., Kuchera, A. N., Pereira, J., Rabeh, A., Rogers, W. F., Smith, J. K., Spyrou, A., Stephenson, S. L., Stiefel, K., Tuttle-Timm, M., Zegers, R. G.  T., and Thoennessen, M. Two-neutron sequential decay of O24.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevC.92.051306.

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                    Jones, M. D., Frank, N., Baumann, T., Brett, J., Bullaro, J., DeYoung, P. A., Finck, J. E., Hammerton, K., Hinnefeld, J., Kohley, Z., Kuchera, A. N., Pereira, J., Rabeh, A., Rogers, W. F., Smith, J. K., Spyrou, A., Stephenson, S. L., Stiefel, K., Tuttle-Timm, M., Zegers, R. G.  T., & Thoennessen, M. Two-neutron sequential decay of O24.  United States.  https://doi.org/10.1103/PhysRevC.92.051306

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                    Jones, M. D., Frank, N., Baumann, T., Brett, J., Bullaro, J., DeYoung, P. A., Finck, J. E., Hammerton, K., Hinnefeld, J., Kohley, Z., Kuchera, A. N., Pereira, J., Rabeh, A., Rogers, W. F., Smith, J. K., Spyrou, A., Stephenson, S. L., Stiefel, K., Tuttle-Timm, M., Zegers, R. G.  T., and Thoennessen, M. Wed .  
"Two-neutron sequential decay of O24".  United States.  https://doi.org/10.1103/PhysRevC.92.051306.  https://www.osti.gov/servlets/purl/1454772.

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@article{osti_1454772,

  title        = {Two-neutron sequential decay of O24},

  author       = {Jones, M. D. and Frank, N. and Baumann, T. and Brett, J. and Bullaro, J. and DeYoung, P. A. and Finck, J. E. and Hammerton, K. and Hinnefeld, J. and Kohley, Z. and Kuchera, A. N. and Pereira, J. and Rabeh, A. and Rogers, W. F. and Smith, J. K. and Spyrou, A. and Stephenson, S. L. and Stiefel, K. and Tuttle-Timm, M. and Zegers, R. G.  T. and Thoennessen, M.},

  abstractNote = {In this study, a two-neutron unbound excited state of 24O 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 Γ<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 24O → 22O + 2n show clear evidence for a sequential decay through an intermediate state in 23O. Neither a di-neutron nor phase-space model for the three-body breakup were able to describe these correlations.},

  doi          = {10.1103/PhysRevC.92.051306},

  journal      = {Physical Review C, Nuclear Physics},

  number       = 5,

  volume       = 92,

  place        = {United States},

  year         = {Wed Nov 25 00:00:00 EST 2015},

  month        = {Wed Nov 25 00:00:00 EST 2015}

}

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Works referenced in this record:

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Correlation studies of the ${}^{5}H$ spectrum
journal, December 2005

Evidence for a doubly magic 24O
journal, February 2009

Neutron occupancy of the $0 d_{5 / 2}$ orbital and the $N = 16$ shell closure in 24 O
journal, December 2014

Unresolved Question of the ${}^{10}{He}$ Ground State Resonance
journal, December 2012

COSY INFINITY Version 9
journal, March 2006

$N = 14$ and 16 shell gaps in neutron-rich oxygen isotopes
journal, March 2004

Reconstruction of nuclear charged fragment trajectories from a large-gap sweeper magnet
journal, October 2007

Nuclear structure experiments along the neutron drip line
journal, February 2012

Evidence for the Ground-State Resonance of ${}^{26}O$
journal, April 2012

First Observation of Ground State Dineutron Decay: ${}^{16}{Be}$
journal, March 2012

Three-body correlations in the decay of 10He and 13Li
journal, December 2010

Beyond the neutron drip line: The unbound oxygen isotopes $^{25}$ O and $^{26}$ O
journal, September 2013

Physics of unstable nuclei: from structure to sequential decays
journal, January 2012

Two-Proton Radioactivity of ${}^{45}F e$
journal, August 2002

Democratic Decay of ${}^{6}{Be}$ Exposed by Correlations
journal, November 2012

Structure of ${}^{10}{He}$ Low-Lying States Uncovered by Correlations
journal, May 2012

On neutron-deficient isotopes of light nuclei and the phenomena of proton and two-proton radioactivity
journal, September 1960

Reaching the limits of nuclear stability
journal, June 2004

Low-lying neutron unbound states in ${}^{12}{Be}$
journal, August 2014

Spectroscopic Study of Neutron Shell Closures via Nucleon Transfer in the Near-Dripline Nucleus ${}^{23}O$
journal, March 2007

System Testing and Installation of the NHMFL/NSCL Sweeper Magnet
journal, June 2005

MoNA—The Modular Neutron Array
journal, June 2003

Discovery of isotopes with
journal, January 2012

The Ame2012 atomic mass evaluation
journal, December 2012

Geant4—a simulation toolkit
journal, July 2003

Unbound excited states of the $N = 16$ closed shell nucleus ${}^{24}O$
journal, September 2015

Selective Population and Neutron Decay of an Excited State of ${}^{23}O$
journal, September 2007

Observation of Strong Low-Lying $E 1$ Strength in the Two-Neutron Halo Nucleus ${}^{11}{Li}$
journal, June 2006

Chronology of the three-body dissociation of ⁸ He
journal, February 2019

The oxygen isotopes
book, March 2017