Neutron-unbound excited states of N23

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

doi:10.1103/PhysRevC.95.044323

Title: Neutron-unbound excited states of ${}^{23}N$

Journal Article · 25 April 2017 · Physical Review C

DOI: https://doi.org/10.1103/PhysRevC.95.044323 · OSTI ID:1407961

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

Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Physics and Astronomy
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
Hope College, Holland, MI (United States). Dept. of Physics
Augustana College, Sioux Falls, SD (United States). Dept. of Physics and Astronomy
Central Michigan Univ., Mount Pleasant, MI (United States). Dept. of Physics
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Chemistry
Indiana Univ., SouthBend, IN (United States). Dept. of Physics and Astronomy
Gettysburg College, PA (United States). Dept. of Physics
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Physics and Astronomy, Joint Inst. for Nuclear Astrophysics

Neutron unbound states in ²³N were populated via proton knockout from an 83.4 MeV/nucleon ²⁴O beam on a liquid deuterium target. The two-body decay energy displays two peaks at E₁ ~ 100 keV and E₂~ 1MeV with respect to the neutron separation energy. The data are consistent with shell model calculations predicting resonances at excitation energies of ~3.6MeV and ~4.5MeV. The selectivity of the reaction implies that these states correspond to the first and second 3/2^- states. Furthermore, the energy of the first state is about 1.3 MeV lower than the first excited 2⁺ in ²⁴O. This decrease is largely due to coupling with the πp $$-1\atop{3/2}$$ hole along with a small reduction of the N = 16 shell gap in ²3N.

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Research Organization:: University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)

Grant/Contract Number:: NA0003180; NA0000979; PHY14-04236; PHY12-05537; PHY11-02511; PHY11- 01745; PHY14-30152; PHY09-69058; PHY12-05357; AC02-05CH11231

OSTI ID:: 1407961

Alternate ID(s):: OSTI ID: 1353135; OSTI ID: 1423618

Journal Information:: Physical Review C, Vol. 95, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (27)

Exotic nuclei and nuclear forces Otsuka, Takaharu Physica Scripta, Vol. T152 https://doi.org/10.1088/0031-8949/2013/T152/014007	journal	January 2013
One-Neutron Removal Measurement Reveals O 24 as a New Doubly Magic Nucleus Kanungo, R.; Nociforo, C.; Prochazka, A. Physical Review Letters, Vol. 102, Issue 15 https://doi.org/10.1103/PhysRevLett.102.152501	journal	April 2009
In-beam γ-ray spectroscopy of the neutron-rich nitrogen isotopes N 19 − 22 Sohler, D.; Stanoiu, M.; Dombrádi, Zs. Physical Review C, Vol. 77, Issue 4 https://doi.org/10.1103/PhysRevC.77.044303	journal	April 2008
Continuum shell model Volya, Alexander; Zelevinsky, Vladimir Physical Review C, Vol. 74, Issue 6 https://doi.org/10.1103/PhysRevC.74.064314	journal	December 2006
The Shell-Model Code NuShellX@MSU Brown, B. A.; Rae, W. D. M. Nuclear Data Sheets, Vol. 120 https://doi.org/10.1016/j.nds.2014.07.022	journal	June 2014
A new view of nuclear shells Kanungo, Rituparna Physica Scripta, Vol. T152 https://doi.org/10.1088/0031-8949/2013/T152/014002	journal	January 2013
Spectroscopy of neutron-unbound 27 , 28 F Christian, G.; Frank, N.; Ash, S. Physical Review C, Vol. 85, Issue 3 https://doi.org/10.1103/PhysRevC.85.034327	journal	March 2012
N = 16 Spherical Shell Closure in O 24 Tshoo, K.; Satou, Y.; Bhang, H. Physical Review Letters, Vol. 109, Issue 2 https://doi.org/10.1103/PhysRevLett.109.022501	journal	July 2012
Liquid hydrogen and helium targets for radioisotope beams at RIKEN Ryuto, H.; Kunibu, M.; Minemura, T. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 555, Issue 1-2 https://doi.org/10.1016/j.nima.2005.08.102	journal	December 2005
Cross Sections for Products of 90-Mev Neutrons on Carbon Kellogg, D. A. Physical Review, Vol. 90, Issue 2 https://doi.org/10.1103/PhysRev.90.224	journal	April 1953
Evolution of Nuclear Shells due to the Tensor Force Otsuka, Takaharu; Suzuki, Toshio; Fujimoto, Rintaro Physical Review Letters, Vol. 95, Issue 23 https://doi.org/10.1103/PhysRevLett.95.232502	journal	November 2005
Evidence for a doubly magic 24O Hoffman, C. R.; Baumann, T.; Bazin, D. Physics Letters B, Vol. 672, Issue 1 https://doi.org/10.1016/j.physletb.2008.12.066	journal	February 2009
Novel Features of Nuclear Forces and Shell Evolution in Exotic Nuclei Otsuka, Takaharu; Suzuki, Toshio; Honma, Michio Physical Review Letters, Vol. 104, Issue 1 https://doi.org/10.1103/PhysRevLett.104.012501	journal	January 2010
COSY INFINITY Version 9 Makino, Kyoko; Berz, Martin Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 558, Issue 1 https://doi.org/10.1016/j.nima.2005.11.109	journal	March 2006
Reconstruction of nuclear charged fragment trajectories from a large-gap sweeper magnet Frank, N.; Schiller, A.; Bazin, D. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 580, Issue 3 https://doi.org/10.1016/j.nima.2007.07.008	journal	October 2007
Disappearance of the N = 14 shell Strongman, M. J.; Spyrou, A.; Hoffman, C. R. Physical Review C, Vol. 80, Issue 2 https://doi.org/10.1103/PhysRevC.80.021302	journal	August 2009
Nuclear structure experiments along the neutron drip line Baumann, T.; Spyrou, A.; Thoennessen, M. Reports on Progress in Physics, Vol. 75, Issue 3 https://doi.org/10.1088/0034-4885/75/3/036301	journal	February 2012
Direct Mass Measurements of B 19 , C 22 , F 29 , Ne 31 , Na 34 and Other Light Exotic Nuclei Gaudefroy, L.; Mittig, W.; Orr, N. A. Physical Review Letters, Vol. 109, Issue 20 https://doi.org/10.1103/PhysRevLett.109.202503	journal	November 2012
Two-neutron sequential decay of O 24 Jones, M. D.; Frank, N.; Baumann, T. Physical Review C, Vol. 92, Issue 5 https://doi.org/10.1103/PhysRevC.92.051306	journal	November 2015
System Testing and Installation of the NHMFL/NSCL Sweeper Magnet Bird, M. D.; Kenney, S. J.; Toth, J. IEEE Transactions on Appiled Superconductivity, Vol. 15, Issue 2 https://doi.org/10.1109/TASC.2005.849553	journal	June 2005
MoNA—The Modular Neutron Array Luther, B.; Baumann, T.; Thoennessen, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 505, Issue 1-2 https://doi.org/10.1016/S0168-9002(03)01014-3	journal	June 2003
The Ame2012 atomic mass evaluation Wang, M.; Audi, G.; Wapstra, A. H. Chinese Physics C, Vol. 36, Issue 12 https://doi.org/10.1088/1674-1137/36/12/003	journal	December 2012
Geant4—a simulation toolkit Agostinelli, S.; Allison, J.; Amako, K. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8	journal	July 2003
Unbound excited states of the N = 16 closed shell nucleus O 24 Rogers, W. F.; Garrett, S.; Grovom, A. Physical Review C, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevC.92.034316	journal	September 2015
Three-Body Forces and the Limit of Oxygen Isotopes Otsuka, Takaharu; Suzuki, Toshio; Holt, Jason D. Physical Review Letters, Vol. 105, Issue 3 https://doi.org/10.1103/PhysRevLett.105.032501	journal	July 2010
Mass systematics for A =29–44 nuclei: The deformed A ∼32 region Warburton, E. K.; Becker, J. A.; Brown, B. A. Physical Review C, Vol. 41, Issue 3 https://doi.org/10.1103/PhysRevC.41.1147	journal	March 1990
Effective interactions for the 0 p 1 s 0 d nuclear shell-model space Warburton, E. K.; Brown, B. A. Physical Review C, Vol. 46, Issue 3 https://doi.org/10.1103/PhysRevC.46.923	journal	September 1992