Fusion of neutron-rich oxygen nuclei

doi:10.1051/epjconf/201716300013

Title: Fusion of neutron-rich oxygen nuclei

Abstract

Measurement of the fusion excitation function for ¹⁸O + ¹²C and ¹⁹O + ¹²C is described. The fusion cross-section is extracted through the direct measurement of evaporation residues resulting from the fusion process. At near barrier energies, the single additional neutron present in ¹⁹O results in an enhancement in the fusion cross-section by a factor of over three as compared to ¹⁸O.

Authors:

deSouza, Romualdo ^[1]; Vadas, Justin ^[1]; Singh, Varinderjit ^[1]; Wiggins, Blake ^[1]; Steinbach, Tracy ^[1]; Lin, Zidu ^[2]; Horowitz, Chuck ^[3]; Baby, Lagy ^[4]; Kuvin, Sean ^[4]; Tripathi, Vandana ^[4]; Wiedenhover, Ingo ^[4]; Umar, Sait ^[5]

Indiana Univ., Bloomington, IN (United States). Dept. of Chemistry, and Center for Exploration of Energy and Matter
Indiana Univ., Bloomington, IN (United States). Center for Exploration of Energy and Matter, and Dept. of Physics
Indiana Univ., Bloomington, IN (United States). Center for Exploration of Energy and Matter, and Dept. of Physics
Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy

Publication Date:: 2017-11-22

Research Org.:: Vanderbilt Univ., Nashville, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

OSTI Identifier:: 1558024

Grant/Contract Number:: SC0013847; SC0008808; FG02-02ER41220; FG02-88ER40404; FG02-87ER40365; PHY-1491574; 1342962

Resource Type:: Accepted Manuscript

Journal Name:: EPJ Web of Conferences

Additional Journal Information:: Journal Volume: 163; Conference: FUSION17, New Orleans, LA (United States), 15-48 Oct 2017; Journal ID: ISSN 2100-014X

Publisher:: EDP Sciences

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    deSouza, Romualdo, Vadas, Justin, Singh, Varinderjit, Wiggins, Blake, Steinbach, Tracy, Lin, Zidu, Horowitz, Chuck, Baby, Lagy, Kuvin, Sean, Tripathi, Vandana, Wiedenhover, Ingo, and Umar, Sait. Fusion of neutron-rich oxygen nuclei.  United States: N. p., 2017. 
        Web.  doi:10.1051/epjconf/201716300013.

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                    deSouza, Romualdo, Vadas, Justin, Singh, Varinderjit, Wiggins, Blake, Steinbach, Tracy, Lin, Zidu, Horowitz, Chuck, Baby, Lagy, Kuvin, Sean, Tripathi, Vandana, Wiedenhover, Ingo, & Umar, Sait. Fusion of neutron-rich oxygen nuclei.  United States.  doi:10.1051/epjconf/201716300013.

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                    deSouza, Romualdo, Vadas, Justin, Singh, Varinderjit, Wiggins, Blake, Steinbach, Tracy, Lin, Zidu, Horowitz, Chuck, Baby, Lagy, Kuvin, Sean, Tripathi, Vandana, Wiedenhover, Ingo, and Umar, Sait. Wed .  
        "Fusion of neutron-rich oxygen nuclei".  United States.  doi:10.1051/epjconf/201716300013.  https://www.osti.gov/servlets/purl/1558024.

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@article{osti_1558024,

  title        = {Fusion of neutron-rich oxygen nuclei},

  author       = {deSouza, Romualdo and Vadas, Justin and Singh, Varinderjit and Wiggins, Blake and Steinbach, Tracy and Lin, Zidu and Horowitz, Chuck and Baby, Lagy and Kuvin, Sean and Tripathi, Vandana and Wiedenhover, Ingo and Umar, Sait},

  abstractNote = {Measurement of the fusion excitation function for 18O + 12C and 19O + 12C is described. The fusion cross-section is extracted through the direct measurement of evaporation residues resulting from the fusion process. At near barrier energies, the single additional neutron present in 19O results in an enhancement in the fusion cross-section by a factor of over three as compared to 18O.},

  doi          = {10.1051/epjconf/201716300013},

  journal      = {EPJ Web of Conferences},

  number       = ,

  volume       = 163,

  place        = {United States},

  year         = {2017},

  month        = {11}

}

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DOI: 10.1051/epjconf/201716300013

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Works referenced in this record:

Microscopic study of Ca $+$ Ca fusion
journal, April 2012

Keser, R.; Umar, A. S.; Oberacker, V. E.
Physical Review C, Vol. 85, Issue 4
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Heavy-ion interaction potential deduced from density-constrained time-dependent Hartree-Fock calculation
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Umar, A. S.; Oberacker, V. E.
Physical Review C, Vol. 74, Issue 2
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Nuclear size and boundary effects on the fusion barrier of oxygen with carbon
journal, April 1976

Eyal, Y.; Beckerman, M.; Chechik, R.
Physical Review C, Vol. 13, Issue 4
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Measuring the fusion cross-section of light nuclei with low-intensity beams
journal, April 2014

Steinbach, T. K.; Rudolph, M. J.; Gosser, Z. Q.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 743
DOI: 10.1016/j.nima.2013.12.045

Entrance channel effect for complete fusion of O + C isotopes
journal, August 1982

Heusch, B.; Beck, C.; Coffin, J. P.
Physical Review C, Vol. 26, Issue 2
DOI: 10.1103/PhysRevC.26.542

Confronting measured near- and sub-barrier fusion cross sections for $^{20}$ O+ $^{12}$ C with a microscopic method
journal, July 2013

deSouza, R. T.; Hudan, S.; Oberacker, V. E.
Physical Review C, Vol. 88, Issue 1
DOI: 10.1103/PhysRevC.88.014602

Microscopic sub-barrier fusion calculations for the neutron star crust
journal, May 2012

Umar, A. S.; Oberacker, V. E.; Horowitz, C. J.
Physical Review C, Vol. 85, Issue 5
DOI: 10.1103/PhysRevC.85.055801

Energy dependence of potential barriers and its effect on fusion cross sections
journal, March 2014

Umar, A. S.; Simenel, C.; Oberacker, V. E.
Physical Review C, Vol. 89, Issue 3
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Interaction Barrier in Charged-Particle Nuclear Reactions
journal, September 1973

Wong, C. Y.
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Microscopic study of $^{16} O +^{16} O$ fusion
journal, August 2013

Simenel, C.; Keser, R.; Umar, A. S.
Physical Review C, Vol. 88, Issue 2
DOI: 10.1103/PhysRevC.88.024617

Sub-nanosecond time-of-flight for segmented silicon detectors
journal, March 2011

deSouza, R. T.; Alexander, A.; Brown, K.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 632, Issue 1
DOI: 10.1016/j.nima.2010.12.101

Relativistic mean field theory in finite nuclei
journal, January 1996

Ring, P.
Progress in Particle and Nuclear Physics, Vol. 37
DOI: 10.1016/0146-6410(96)00054-3

Global and consistent analysis of the heavy-ion elastic scattering and fusion processes
journal, March 2004

Gasques, L. R.; Chamon, L. C.; Pereira, D.
Physical Review C, Vol. 69, Issue 3
DOI: 10.1103/PhysRevC.69.034603

Sub-barrier enhancement of fusion as compared to a microscopic method in ${}^{18}O + {}^{12}C$
journal, October 2014

Steinbach, T. K.; Vadas, J.; Schmidt, J.
Physical Review C, Vol. 90, Issue 4
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journal, October 1979

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Similar Records in DOE PAGES and OSTI.GOV collections:

Fusion enhancement at near and sub-barrier energies in 19O + 12C

Journal Article Singh, Varinderjit ; Vadas, J. ; Steinbach, T. K. ; ... - Physics Letters B

Measuring the fusion excitation function for an isotopic chain of projectile nuclei provides a stringent test of a microscopic description of fusion. We report the first measurement of the fusion excitation function at near-barrier energies for the ¹⁹O + ¹²C system. The measured excitation function is compared with the fusion excitation function of ¹⁸O + ¹²C. A significant enhancement in the fusion probability of ¹⁹O ions with a 12C target as compared to ¹⁸O ions is observed. The experimental cross-sections observed at near-barrier energies are compared with a state-of-the-art microscopic model.
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Here, we report the first measurement of the fusion excitation functions for ^39,47K + ²⁸Si at near-barrier energies. Evaporation residues resulting from the fusion process were identified by direct measurement of their energy and time-of-flight with high geometric efficiency. At the lowest incident energy, the cross section measured for the neutron-rich ⁴⁷K-induced reaction is ≈6 times larger than that of the β-stable system. This experimental approach, both in measurement and in analysis, demonstrates how to efficiently measure fusion with low-intensity re-accelerated radioactive beams, establishing the framework for future studies.
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Full Text Available
Systematics of carbon- and oxygen-induced fusion on nuclei with 12 < or = A < or = 19

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Measurements of the total fusion cross sections for /sup 12/C + /sup 12/C, /sup 13/C, /sup 14/N, /sup 15/N, /sup 16/O, /sup 18/O, and /sup 19/F and /sup 16/O + /sup 16/O have been performed over the energy range from 1.5 to 3 times the Coulomb barrier energy. Fusion barrier parameters were extracted for each system. Three systems, /sup 12/C + /sup 12/C, /sup 12/C + /sup 16/O, and /sup 16/O + /sup 16/O, show rather pronounced oscillatory structure in the energy dependence of the fusion cross sections. The maximum fusion cross sections for the systems studied vary by asmore »« less
DOI: 10.1103/PhysRevC.20.1305
Effect of the entrance channel mass asymmetry on the limitation of light heavy-ion fusion cross sections

Journal Article Anjos, R M ; Guimaraes, V ; Added, N ; ... - Physical Review, C (Nuclear Physics); (USA)

Evaporation residues resulting from the {sup 11}B+{sup 27}Al and {sup 19}F+{sup 19}F fusion reactions leading to the {sup 38}Ar compound nucleus and from the {sup 19}F+({sup 12}C, {sup 16}O, {sup 27}Al, {sup 40}Ca) reactions have been measured at incident energies 32 MeV{le}{ital E}{sub {ital L}}({sup 19}F){le}72 MeV and 15 MeV{le}{ital E}{sub {ital L}}({sup 11}B){le}50 MeV. The hindrance of the fusion cross sections, at energies above the interaction barrier, show a clear dependence on the entrance channel mass asymmetry. This dependence is discussed in terms of model predictions that treat explicitly the mass asymmetry degree of freedom.
DOI: 10.1103/PhysRevC.42.354

Similar Records

Title: Fusion of neutron-rich oxygen nuclei

Abstract

Citation Formats

Microscopic study of Ca + Ca fusion journal, April 2012

Heavy-ion interaction potential deduced from density-constrained time-dependent Hartree-Fock calculation journal, August 2006

Nuclear size and boundary effects on the fusion barrier of oxygen with carbon journal, April 1976

Measuring the fusion cross-section of light nuclei with low-intensity beams journal, April 2014

Entrance channel effect for complete fusion of O + C isotopes journal, August 1982

Confronting measured near- and sub-barrier fusion cross sections for 20 O+ 12 C with a microscopic method journal, July 2013

Microscopic sub-barrier fusion calculations for the neutron star crust journal, May 2012

Energy dependence of potential barriers and its effect on fusion cross sections journal, March 2014

Interaction Barrier in Charged-Particle Nuclear Reactions journal, September 1973

Microscopic study of 16 O + 16 O fusion journal, August 2013

Sub-nanosecond time-of-flight for segmented silicon detectors journal, March 2011

Relativistic mean field theory in finite nuclei journal, January 1996

Global and consistent analysis of the heavy-ion elastic scattering and fusion processes journal, March 2004

Sub-barrier enhancement of fusion as compared to a microscopic method in O 18 + C 12 journal, October 2014

Systematics of carbon- and oxygen-induced fusion on nuclei with 12 ≤ A ≤ 19 journal, October 1979

Microscopic study of Ca $+$ Ca fusion
journal, April 2012

Heavy-ion interaction potential deduced from density-constrained time-dependent Hartree-Fock calculation
journal, August 2006

Nuclear size and boundary effects on the fusion barrier of oxygen with carbon
journal, April 1976

Measuring the fusion cross-section of light nuclei with low-intensity beams
journal, April 2014

Entrance channel effect for complete fusion of O + C isotopes
journal, August 1982

Confronting measured near- and sub-barrier fusion cross sections for $^{20}$ O+ $^{12}$ C with a microscopic method
journal, July 2013

Microscopic sub-barrier fusion calculations for the neutron star crust
journal, May 2012

Energy dependence of potential barriers and its effect on fusion cross sections
journal, March 2014

Interaction Barrier in Charged-Particle Nuclear Reactions
journal, September 1973

Microscopic study of $^{16} O +^{16} O$ fusion
journal, August 2013

Sub-nanosecond time-of-flight for segmented silicon detectors
journal, March 2011

Relativistic mean field theory in finite nuclei
journal, January 1996

Global and consistent analysis of the heavy-ion elastic scattering and fusion processes
journal, March 2004

Sub-barrier enhancement of fusion as compared to a microscopic method in ${}^{18}O + {}^{12}C$
journal, October 2014

Systematics of carbon- and oxygen-induced fusion on nuclei with $12 \leq A \leq 19$
journal, October 1979