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Title: First Observation of Unbound O 11 , the Mirror of the Halo Nucleus Li 11

Abstract

The structure of the extremely proton-rich nucleus O 8 11 3 , the mirror of the two-neutron halo nucleus Li 3 11 8 , has been studied experimentally for the first time. Following two-neutron knockout reactions with a O 13 beam, the O 11 decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width ~ 3.4 MeV was determined. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four lowest O 11 resonant states: J π = 3 / 2 1 - , 3 / 2 2 - , 5 / 2 1 + , and 5 / 2 2 + . The widths and configurations of these states show strong, nonmonotonic dependencies on the depth of the p - C 9 potential. This unusual behavior is due to the presence of a broad threshold resonant state in N 10 , which is an analog of the virtual state in Li 10 in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of O 11 and Li 11 was discovered.

Authors:
 [1];  [2];  [2];  [1];  [1];  [2];  [2];  [3];  [2];  [1];  [4];  [2];  [2];  [4];  [2];  [2];  [1];  [2];  [4];  [1] more »;  [2];  [2];  [2];  [4];  [2];  [2] « less
  1. Washington Univ., St. Louis, MO (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Western Michigan Univ., Kalamazoo MI (United States)
  4. Univ. of Connecticut, Storrs, CT (United States)
Publication Date:
Research Org.:
Western Michigan Univ., Kalamazoo MI (United States); Washington Univ., St. Louis, MO (United States); Krell Institute, Ames, IA (United States); Texas A & M Univ., Commerce, TX (United States); Michigan State Univ., East Lansing, MI (United States); Univ. of Connecticut, Storrs, CT (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA): National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1609529
Alternate Identifier(s):
OSTI ID: 1504529
Grant/Contract Number:  
FG02-04ER41320; FG02-87ER40316; NA0002135; SC0009971; SC0013365; SC0014552; SC0018083; PHY-156556
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 122; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; physics; lifetimes & widths; nuclear structure & decays; proton emission; rare & new isotopes; 6 ≤ A ≤ 19

Citation Formats

Webb, T. B., Wang, S. M., Brown, K. W., Charity, R. J., Elson, J. M., Barney, J., Cerizza, G., Chajecki, Z., Estee, J., Hoff, D. E. M., Kuvin, S. A., Lynch, W. G., Manfredi, J., McNeel, D., Morfouace, P., Nazarewicz, W., Pruitt, C. D., Santamaria, C., Smith, J., Sobotka, L. G., Sweany, S., Tsang, C. Y., Tsang, M. B., Wuosmaa, A. H., Zhang, Y., and Zhu, K. First Observation of Unbound O11, the Mirror of the Halo Nucleus Li11. United States: N. p., 2019. Web. doi:10.1103/physrevlett.122.122501.
Webb, T. B., Wang, S. M., Brown, K. W., Charity, R. J., Elson, J. M., Barney, J., Cerizza, G., Chajecki, Z., Estee, J., Hoff, D. E. M., Kuvin, S. A., Lynch, W. G., Manfredi, J., McNeel, D., Morfouace, P., Nazarewicz, W., Pruitt, C. D., Santamaria, C., Smith, J., Sobotka, L. G., Sweany, S., Tsang, C. Y., Tsang, M. B., Wuosmaa, A. H., Zhang, Y., & Zhu, K. First Observation of Unbound O11, the Mirror of the Halo Nucleus Li11. United States. https://doi.org/10.1103/physrevlett.122.122501
Webb, T. B., Wang, S. M., Brown, K. W., Charity, R. J., Elson, J. M., Barney, J., Cerizza, G., Chajecki, Z., Estee, J., Hoff, D. E. M., Kuvin, S. A., Lynch, W. G., Manfredi, J., McNeel, D., Morfouace, P., Nazarewicz, W., Pruitt, C. D., Santamaria, C., Smith, J., Sobotka, L. G., Sweany, S., Tsang, C. Y., Tsang, M. B., Wuosmaa, A. H., Zhang, Y., and Zhu, K. Fri . "First Observation of Unbound O11, the Mirror of the Halo Nucleus Li11". United States. https://doi.org/10.1103/physrevlett.122.122501. https://www.osti.gov/servlets/purl/1609529.
@article{osti_1609529,
title = {First Observation of Unbound O11, the Mirror of the Halo Nucleus Li11},
author = {Webb, T. B. and Wang, S. M. and Brown, K. W. and Charity, R. J. and Elson, J. M. and Barney, J. and Cerizza, G. and Chajecki, Z. and Estee, J. and Hoff, D. E. M. and Kuvin, S. A. and Lynch, W. G. and Manfredi, J. and McNeel, D. and Morfouace, P. and Nazarewicz, W. and Pruitt, C. D. and Santamaria, C. and Smith, J. and Sobotka, L. G. and Sweany, S. and Tsang, C. Y. and Tsang, M. B. and Wuosmaa, A. H. and Zhang, Y. and Zhu, K.},
abstractNote = {The structure of the extremely proton-rich nucleus O8113, the mirror of the two-neutron halo nucleus Li3118, has been studied experimentally for the first time. Following two-neutron knockout reactions with a O13 beam, the O11 decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width ~3.4MeV was determined. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four lowest O11 resonant states: Jπ=3/21-, 3/22-, 5/21+, and 5/22+. The widths and configurations of these states show strong, nonmonotonic dependencies on the depth of the p-C9 potential. This unusual behavior is due to the presence of a broad threshold resonant state in N10, which is an analog of the virtual state in Li10 in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of O11 and Li11 was discovered.},
doi = {10.1103/physrevlett.122.122501},
url = {https://www.osti.gov/biblio/1609529}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 12,
volume = 122,
place = {United States},
year = {2019},
month = {3}
}

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    Works referencing / citing this record:

    Population of O 11 * in two-neutron removal from O 13
    journal, August 2019


    Particle decays of levels in N 11 , 12 and O 12 investigated with the invariant-mass method
    journal, August 2019


    Mirror nuclei of 1 n / 2 n halo systems as 1 p / 2 p emitters
    journal, November 2019


    Beyond the proton drip line: Bayesian analysis of proton-emitting nuclei
    journal, January 2020


    Energy and width of O 11 ( g . s . )
    journal, May 2019


    Structure and decay of the extremely proton-rich nuclei O 11 , 12
    journal, May 2019


    Convenient Location of a Near-Threshold Proton-Emitting Resonance in B 11
    journal, January 2020