Neutron-unbound excited states of N 23

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

doi:10.1103/PhysRevC.95.044323

Neutron-unbound excited states of N 23

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

Physics and Astronomy

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Abstract

Neutron unbound states in N23 were populated via proton knockout from an 83.4 MeV/nucleon O24 beam on a liquid deuterium target. The two-body decay energy displays two peaks at E1∼100keV 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. The energy of the first state is about 1.3 MeV lower than the first excited 2+ in O24. This decrease is largely due to coupling with the πp3/2-1 hole along with a small reduction of the N=16 shell gap in N23.

Original language	English (US)
Article number	044323
Journal	Physical Review C
Volume	95
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.95.044323
State	Published - Apr 25 2017

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.95.044323

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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. (2017). Neutron-unbound excited states of N 23. Physical Review C, 95(4), Article 044323. https://doi.org/10.1103/PhysRevC.95.044323

@article{61851536345c483095dccca65afc59ee,

title = "Neutron-unbound excited states of N 23",

abstract = "Neutron unbound states in N23 were populated via proton knockout from an 83.4 MeV/nucleon O24 beam on a liquid deuterium target. The two-body decay energy displays two peaks at E1∼100keV 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. The energy of the first state is about 1.3 MeV lower than the first excited 2+ in O24. This decrease is largely due to coupling with the πp3/2-1 hole along with a small reduction of the N=16 shell gap in N23.",

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

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = apr,

day = "25",

doi = "10.1103/PhysRevC.95.044323",

language = "English (US)",

volume = "95",

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Jones, MD, Baumann, T, Brett, J, Bullaro, J, DeYoung, PA, Finck, JE, Frank, N, Hammerton, K, Hinnefeld, J, Kohley, Z, Kuchera, AN, Pereira, J, Rabeh, A, Smith, JK, Spyrou, A, Stephenson, SL, Stiefel, K, Tuttle-Timm, M, Zegers, RGT & Thoennessen, M 2017, 'Neutron-unbound excited states of N 23', Physical Review C, vol. 95, no. 4, 044323. https://doi.org/10.1103/PhysRevC.95.044323

TY - JOUR

T1 - Neutron-unbound excited states of N 23

AU - Jones, M. D.

AU - Baumann, T.

AU - Brett, J.

AU - Bullaro, J.

AU - DeYoung, P. A.

AU - Finck, J. E.

AU - Frank, N.

AU - Hammerton, K.

AU - Hinnefeld, J.

AU - Kohley, Z.

AU - Kuchera, A. N.

AU - Pereira, J.

AU - Rabeh, A.

AU - Smith, J. K.

AU - Spyrou, A.

AU - Stephenson, S. L.

AU - Stiefel, K.

AU - Tuttle-Timm, M.

AU - Zegers, R. G.T.

AU - Thoennessen, M.

PY - 2017/4/25

Y1 - 2017/4/25

N2 - Neutron unbound states in N23 were populated via proton knockout from an 83.4 MeV/nucleon O24 beam on a liquid deuterium target. The two-body decay energy displays two peaks at E1∼100keV 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. The energy of the first state is about 1.3 MeV lower than the first excited 2+ in O24. This decrease is largely due to coupling with the πp3/2-1 hole along with a small reduction of the N=16 shell gap in N23.

AB - Neutron unbound states in N23 were populated via proton knockout from an 83.4 MeV/nucleon O24 beam on a liquid deuterium target. The two-body decay energy displays two peaks at E1∼100keV 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. The energy of the first state is about 1.3 MeV lower than the first excited 2+ in O24. This decrease is largely due to coupling with the πp3/2-1 hole along with a small reduction of the N=16 shell gap in N23.

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VL - 95

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044323

ER -

Neutron-unbound excited states of N 23

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