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Title: Invariant-mass spectrum of O 11

Abstract

The invariant-mass distribution of O 11 fragments formed in two-neutron-knockout reactions with a O 13 projectile and Be 9 target has been also examined. Gating on events where the C 9 decay fragments produced following 2 p emission are recoiled transversely in the projectile's frame improves the overall invariant-mass resolution. The observed peak is now shown to have contributions from at least two O 11 levels, in contradiction with the suggestion of Fortune [Phys. Rev. C 99, 051302(R) (2019)]. The data, yet, do not differentiate between the ground-state properties obtained by the Gamow coupled-channels calculation and the prompt 2 p -decay model of Fortune. The ground-state 2 p -decay energy is 4.25(6) MeV in a two-level fit to the data, but lower values are possible if more states contribute to the observed spectrum, as suggested in the previous analysis.

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2]; ORCiD logo [2];  [2];  [2];  [2];  [2]; ORCiD logo [2];  [2];  [3] more »;  [3]; ORCiD logo [3];  [3];  [4] « less
  1. Washington Univ., St. Louis, MO (United States)
  2. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  3. Univ. of Connecticut, Storrs, CT (United States)
  4. Western Michigan Univ., Kalamazoo MI (United States)
Publication Date:
Research Org.:
George Washington Univ., Washington, DC (United States); Western Michigan Univ., Kalamazoo MI (United States); Univ. of Connecticut, Storrs, CT (United States); Michigan State Univ., East Lansing, MI (United States); Texas A & M Univ., College Station, TX (United States); Krell Institute, Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
OSTI Identifier:
1616450
Grant/Contract Number:  
FG02-87ER40316; FG02-04ER41320; SC0014552; SC0013365; SC0018083; SC0009971; PHY-156556; NA0002135
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 101; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; exotic nuclei; drip lines

Citation Formats

Webb, T. B., Charity, Robert J., Elson, J. M., Hoff, D. E. M., Pruitt, C. D., Sobotka, L. G., Brown, K. W., Barney, J., Cerizza, G., Estee, J., Lynch, W. G., Manfredi, J., Morfouace, P., Santamaria, C., Sweany, S., Tsang, M. B., Tsang, T., Zhang, Y., Zhu, K., Kuvin, S. A., McNeel, D., Smith, J., Wuosmaa, A. H., and Chajecki, Z. Invariant-mass spectrum of O11. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevC.101.044317.
Webb, T. B., Charity, Robert J., Elson, J. M., Hoff, D. E. M., Pruitt, C. D., Sobotka, L. G., Brown, K. W., Barney, J., Cerizza, G., Estee, J., Lynch, W. G., Manfredi, J., Morfouace, P., Santamaria, C., Sweany, S., Tsang, M. B., Tsang, T., Zhang, Y., Zhu, K., Kuvin, S. A., McNeel, D., Smith, J., Wuosmaa, A. H., & Chajecki, Z. Invariant-mass spectrum of O11. United States. https://doi.org/10.1103/PhysRevC.101.044317
Webb, T. B., Charity, Robert J., Elson, J. M., Hoff, D. E. M., Pruitt, C. D., Sobotka, L. G., Brown, K. W., Barney, J., Cerizza, G., Estee, J., Lynch, W. G., Manfredi, J., Morfouace, P., Santamaria, C., Sweany, S., Tsang, M. B., Tsang, T., Zhang, Y., Zhu, K., Kuvin, S. A., McNeel, D., Smith, J., Wuosmaa, A. H., and Chajecki, Z. Mon . "Invariant-mass spectrum of O11". United States. https://doi.org/10.1103/PhysRevC.101.044317. https://www.osti.gov/servlets/purl/1616450.
@article{osti_1616450,
title = {Invariant-mass spectrum of O11},
author = {Webb, T. B. and Charity, Robert J. and Elson, J. M. and Hoff, D. E. M. and Pruitt, C. D. and Sobotka, L. G. and Brown, K. W. and Barney, J. and Cerizza, G. and Estee, J. and Lynch, W. G. and Manfredi, J. and Morfouace, P. and Santamaria, C. and Sweany, S. and Tsang, M. B. and Tsang, T. and Zhang, Y. and Zhu, K. and Kuvin, S. A. and McNeel, D. and Smith, J. and Wuosmaa, A. H. and Chajecki, Z.},
abstractNote = {The invariant-mass distribution of O11 fragments formed in two-neutron-knockout reactions with a O13 projectile and Be9 target has been also examined. Gating on events where the C9 decay fragments produced following 2p emission are recoiled transversely in the projectile's frame improves the overall invariant-mass resolution. The observed peak is now shown to have contributions from at least two O11 levels, in contradiction with the suggestion of Fortune [Phys. Rev. C 99, 051302(R) (2019)]. The data, yet, do not differentiate between the ground-state properties obtained by the Gamow coupled-channels calculation and the prompt 2p-decay model of Fortune. The ground-state 2p-decay energy is 4.25(6) MeV in a two-level fit to the data, but lower values are possible if more states contribute to the observed spectrum, as suggested in the previous analysis.},
doi = {10.1103/PhysRevC.101.044317},
journal = {Physical Review C},
number = 4,
volume = 101,
place = {United States},
year = {2020},
month = {4}
}

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