Nuclear structure beyond the neutron drip line. The lowest energy states in 9He via their T=5/2 isobaric analogs in 9Li
Abstract
The level structure of the very neutron rich and unbound 9He nucleus has been the subject of significant experimental and theoretical study. Many recent works have claimed that the two lowest energy 9He states exist with spins Jπ=1/2+and Jπ=1/2-and widths on the order of 100–200 keV. These find-ings cannot be reconciled with our contemporary understanding of nuclear structure. Our present work is the first high-resolution study with low statistical uncertainty of the relevant excitation energy range in the 8He+n system, performed via a search for the T =5/2 isobaric analog states in 9Li populated through 8He+p elastic scattering. Moreover, the present data show no indication of any narrow structures. Instead, we find evidence for a broad Jπ=1/2+state in 9He located approximately 3 MeV above the neutron decay threshold.
- Authors:
-
- Texas A & M Univ., College Station, TX (United States)
- TRIUMF, Vancouver, BC (Canada)
- Shanghai Jiao Tong Univ. (China)
- Publication Date:
- Research Org.:
- Texas A & M Univ., College Station, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1249054
- Grant/Contract Number:
- FG02-93ER40773
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Volume: 754; Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Uberseder, E., Rogachev, G. V., Goldberg, V. Z., Koshchiy, E., Roeder, B. T., Alcorta, M., Chubarian, G., Davids, B., Fu, C., Hooker, J., Jayatissa, H., Melconian, D., and Tribble, R. E. Nuclear structure beyond the neutron drip line. The lowest energy states in 9He via their T=5/2 isobaric analogs in 9Li. United States: N. p., 2016.
Web. doi:10.1016/j.physletb.2016.01.014.
Uberseder, E., Rogachev, G. V., Goldberg, V. Z., Koshchiy, E., Roeder, B. T., Alcorta, M., Chubarian, G., Davids, B., Fu, C., Hooker, J., Jayatissa, H., Melconian, D., & Tribble, R. E. Nuclear structure beyond the neutron drip line. The lowest energy states in 9He via their T=5/2 isobaric analogs in 9Li. United States. https://doi.org/10.1016/j.physletb.2016.01.014
Uberseder, E., Rogachev, G. V., Goldberg, V. Z., Koshchiy, E., Roeder, B. T., Alcorta, M., Chubarian, G., Davids, B., Fu, C., Hooker, J., Jayatissa, H., Melconian, D., and Tribble, R. E. Tue .
"Nuclear structure beyond the neutron drip line. The lowest energy states in 9He via their T=5/2 isobaric analogs in 9Li". United States. https://doi.org/10.1016/j.physletb.2016.01.014. https://www.osti.gov/servlets/purl/1249054.
@article{osti_1249054,
title = {Nuclear structure beyond the neutron drip line. The lowest energy states in 9He via their T=5/2 isobaric analogs in 9Li},
author = {Uberseder, E. and Rogachev, G. V. and Goldberg, V. Z. and Koshchiy, E. and Roeder, B. T. and Alcorta, M. and Chubarian, G. and Davids, B. and Fu, C. and Hooker, J. and Jayatissa, H. and Melconian, D. and Tribble, R. E.},
abstractNote = {The level structure of the very neutron rich and unbound 9He nucleus has been the subject of significant experimental and theoretical study. Many recent works have claimed that the two lowest energy 9He states exist with spins Jπ=1/2+and Jπ=1/2-and widths on the order of 100–200 keV. These find-ings cannot be reconciled with our contemporary understanding of nuclear structure. Our present work is the first high-resolution study with low statistical uncertainty of the relevant excitation energy range in the 8He+n system, performed via a search for the T =5/2 isobaric analog states in 9Li populated through 8He+p elastic scattering. Moreover, the present data show no indication of any narrow structures. Instead, we find evidence for a broad Jπ=1/2+state in 9He located approximately 3 MeV above the neutron decay threshold.},
doi = {10.1016/j.physletb.2016.01.014},
journal = {Physics Letters B},
number = C,
volume = 754,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 2016},
month = {Tue Mar 01 00:00:00 EST 2016}
}
Web of Science
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Works referencing / citing this record:
Structure of through proton resonance scattering with the Texas Active Target detector
journal, November 2019
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