First Observation of Unbound O11, the Mirror of the Halo Nucleus Li11

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.

doi:10.1103/physrevlett.122.122501

Title: First Observation of Unbound ${}^{11}O$ , the Mirror of the Halo Nucleus ${}^{11}{Li}$

Abstract

The structure of the extremely proton-rich nucleus ${{}_{8}^{11}O}_{3}$ , the mirror of the two-neutron halo nucleus ${}_{3}^{11}{Li}_{8}$ , has been studied experimentally for the first time. Following two-neutron knockout reactions with a ${}_{13}O$ beam, the ${}_{11}O$ 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 ${}_{11}O$ 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 $p$ - ${}_{9}C$ potential. This unusual behavior is due to the presence of a broad threshold resonant state in ${}_{10}N$ , which is an analog of the virtual state in ${}_{10}{Li}$ in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of ${}_{11}O$ and ${}_{11}{Li}$ was discovered.

Authors:

Webb, T. B. ^[1]; Wang, S. M. ^[2]; Brown, K. W. ^[2]; Charity, R. J. ^[1]; Elson, J. M. ^[1]; Barney, J. ^[2]; Cerizza, G. ^[2]; Chajecki, Z. ^[3]; Estee, J. ^[2]; Hoff, D. E. M. ^[1]; Kuvin, S. A. ^[4]; Lynch, W. G. ^[2]; Manfredi, J. ^[2]; McNeel, D. ^[4]; Morfouace, P. ^[2]; Nazarewicz, W. ^[2]; Pruitt, C. D. ^[1]; Santamaria, C. ^[2]; Smith, J. ^[4]; Sobotka, L. G. ^[1] more »

Washington Univ., St. Louis, MO (United States)
Michigan State Univ., East Lansing, MI (United States)
Western Michigan Univ., Kalamazoo MI (United States)
Univ. of Connecticut, Storrs, CT (United States)

Publication Date:: Fri Mar 29 00:00:00 EDT 2019

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:: 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.

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                    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

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                    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.

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@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},

  journal      = {Physical Review Letters},

  number       = 12,

  volume       = 122,

  place        = {United States},

  year         = {Fri Mar 29 00:00:00 EDT 2019},

  month        = {Fri Mar 29 00:00:00 EDT 2019}

}

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Mirror nuclei of $1 n / 2 n$ halo systems as $1 p / 2 p$ emitters
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Energy and width of ${}^{11}O (g . s .)$
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Fortune, H. T.
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Beyond the proton drip line: Bayesian analysis of proton-emitting nuclei
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Title: First Observation of Unbound O 11 , the Mirror of the Halo Nucleus Li 11

Abstract

Citation Formats

Pairing correlations in nuclei on the neutron-drip line journal, October 2005

Shell model in the complex energy plane journal, October 2008

Observation of Long-Range Three-Body Coulomb Effects in the Decay of Ne 16 journal, December 2014

Resonant spectra of multipole-bound anions journal, December 2018

Systematic investigation of the drip-line nuclei 11Li and 14Be and their unbound subsystems 10Li and 13Be journal, July 2007

Evidence of Soft Dipole Resonance in Li 11 with Isoscalar Character journal, May 2015

Two-Proton Widths of O 12 , N 16 e , and Three-Body Mechanism of Thomas-Ehrman Shift journal, January 2002

Two-proton decay of 12 O and its isobaric analog state in 12 N journal, July 2012

Single-particle energies, wave functions, quadrupole moments and g-factors in an axially deformed woods-saxon potential with applications to the two-centre-type nuclear problems journal, September 1987

Effects of Li 10 virtual states on the structure of Li 11 journal, April 1994

Antibound states and halo formation in the Gamow shell model journal, November 2006

Nuclear rotation in the continuum journal, January 2016

Halo-induced large enhancement of soft dipole excitation of 11 Li observed via proton inelastic scattering journal, November 2017

Proton-decaying states in light nuclei and the first observation of Na 17 journal, April 2017

Structure and decays of nuclear three-body systems: The Gamow coupled-channel method in Jacobi coordinates journal, October 2017

Systematic investigation of scattering problems with the resonating-group method journal, August 1977

On the Determination of Reduced Widths from the One-Level Dispersion Formula journal, January 1951

Neutron halo nuclei journal, February 1996

Structure and reactions of quantum halos journal, February 2004

Double isobaric analog of 11 Li in 11 B journal, October 2012

Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using a C 9 beam journal, July 2011

Puzzling Two-Proton Decay of Kr 67 journal, May 2018

A shell model representation with antibound states journal, March 2004

Isospin mixing and the continuum coupling in weakly bound nuclei journal, October 2010

Update on 12 O(g.s.) width for simultaneous 2p decay journal, March 2013

Subthreshold resonances in few-neutron systems journal, November 1997

The first excited states of 9Be and 9B journal, January 1999

Bound, virtual, and resonance S -matrix poles from the Schrödinger equation journal, May 2010

Lithium isotopes beyond the drip line journal, September 2008

The high resolution array (HiRA) for rare isotope beam experiments journal, December 2007

12 O ground-state decay by 2 He emission journal, March 2001

On the Origin of Nuclear Clustering journal, January 2012

An Analysis of the Energy Levels of the Mirror Nuclei, C 13 and N 13 journal, December 1952

Radio Frequency Fragment Separator at NSCL journal, July 2009

On the Displacement of Corresponding Energy Levels of C 13 and N 13 journal, February 1951

Open problems in the theory of nuclear open quantum systems journal, May 2010

Neutron correlations in the decay of the first excited state of 11Li journal, November 2016

About Coulomb energy shifts in halo nuclei journal, December 2000

Isospin mixing and the continuum coupling in weakly bound nuclei text, January 2009

Halo-induced large enhancement of soft dipole excitation of 11Li observed via proton inelastic scattering text, January 2017

Antibound States and Halo Formation in the Gamow Shell Model text, January 2006

The first excited states of 9Be and 9B text, January 1998

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

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

Beyond the proton drip line: Bayesian analysis of proton-emitting nuclei text, January 2019

Title: First Observation of Unbound ${}^{11}O$ , the Mirror of the Halo Nucleus ${}^{11}{Li}$

Pairing correlations in nuclei on the neutron-drip line
journal, October 2005

Shell model in the complex energy plane
journal, October 2008

Observation of Long-Range Three-Body Coulomb Effects in the Decay of ${}^{16}{Ne}$
journal, December 2014

Resonant spectra of multipole-bound anions
journal, December 2018

Systematic investigation of the drip-line nuclei 11Li and 14Be and their unbound subsystems 10Li and 13Be
journal, July 2007

Evidence of Soft Dipole Resonance in ${}^{11}{Li}$ with Isoscalar Character
journal, May 2015

Two-Proton Widths of ${}^{12}O$ , ${}^{16}N e$ , and Three-Body Mechanism of Thomas-Ehrman Shift
journal, January 2002

Two-proton decay of $^{12}$ O and its isobaric analog state in $^{12}$ N
journal, July 2012

Single-particle energies, wave functions, quadrupole moments and g-factors in an axially deformed woods-saxon potential with applications to the two-centre-type nuclear problems
journal, September 1987

Effects of ${}^{10}{Li}$ virtual states on the structure of ${}^{11}{Li}$
journal, April 1994

Antibound states and halo formation in the Gamow shell model
journal, November 2006

Nuclear rotation in the continuum
journal, January 2016

Halo-induced large enhancement of soft dipole excitation of 11 Li observed via proton inelastic scattering
journal, November 2017

Proton-decaying states in light nuclei and the first observation of ${}^{17}{Na}$
journal, April 2017

Structure and decays of nuclear three-body systems: The Gamow coupled-channel method in Jacobi coordinates
journal, October 2017

Systematic investigation of scattering problems with the resonating-group method
journal, August 1977

On the Determination of Reduced Widths from the One-Level Dispersion Formula
journal, January 1951

Neutron halo nuclei
journal, February 1996

Structure and reactions of quantum halos
journal, February 2004

Double isobaric analog of $^{11}$ Li in $^{11}$ B
journal, October 2012

Investigations of three-, four-, and five-particle decay channels of levels in light nuclei created using a ${}^{9}C$ beam
journal, July 2011

Puzzling Two-Proton Decay of ${}^{67}{Kr}$
journal, May 2018

A shell model representation with antibound states
journal, March 2004

Isospin mixing and the continuum coupling in weakly bound nuclei
journal, October 2010

Update on ¹² O(g.s.) width for simultaneous 2p decay
journal, March 2013

Subthreshold resonances in few-neutron systems
journal, November 1997

The first excited states of 9Be and 9B
journal, January 1999

Bound, virtual, and resonance $S$ -matrix poles from the Schrödinger equation
journal, May 2010

Lithium isotopes beyond the drip line
journal, September 2008

The high resolution array (HiRA) for rare isotope beam experiments
journal, December 2007

$^{12} O$ ground-state decay by $^{2} He$ emission
journal, March 2001

On the Origin of Nuclear Clustering
journal, January 2012

An Analysis of the Energy Levels of the Mirror Nuclei, $C^{13}$ and $N^{13}$
journal, December 1952

Radio Frequency Fragment Separator at NSCL
journal, July 2009

On the Displacement of Corresponding Energy Levels of $C^{13}$ and $N^{13}$
journal, February 1951

Open problems in the theory of nuclear open quantum systems
journal, May 2010

Neutron correlations in the decay of the first excited state of 11Li
journal, November 2016

About Coulomb energy shifts in halo nuclei
journal, December 2000

Isospin mixing and the continuum coupling in weakly bound nuclei
text, January 2009

Halo-induced large enhancement of soft dipole excitation of 11Li observed via proton inelastic scattering
text, January 2017

Antibound States and Halo Formation in the Gamow Shell Model
text, January 2006

The first excited states of 9Be and 9B
text, January 1998

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

Energy and width of ${}^{11}O (g . s .)$
journal, May 2019

Beyond the proton drip line: Bayesian analysis of proton-emitting nuclei
text, January 2019