Structure of Ne20 states in resonance O16+α elastic scattering

Nauruzbayev, D. K.; Goldberg, V. Z.; Nurmukhanbetova, A. K.; Golovkov, M. S.; Volya, A.; Rogachev, G. V.; Tribble, R. E.

doi:10.1103/PhysRevC.96.014322

Structure of ${}^{20}{Ne}$ states in resonance ${}^{16}O + α$ elastic scattering

Journal Article · Fri Jul 28 00:00:00 EDT 2017 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.96.014322· OSTI ID:1594031

Nauruzbayev, D. K. ^[1]; Goldberg, V. Z. ^[2]; Nurmukhanbetova, A. K. ^[3]; Golovkov, M. S. ^[4]; ^[5]; Rogachev, G. V. ^[2]; Tribble, R. E. ^[2]

Nazarbayev Univ., Astana (Kazakhstan); St. Petersburg State Univ., St. Petersburg (Russia); Florida State University
Texas A & M Univ., College Station, TX (United States). Cyclotron Inst.
Nazarbayev Univ., Astana (Kazakhstan)
Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation); Dubna State Univ., Dubna (Russia)
Florida State Univ., Tallahassee, FL (United States)

Background: The nuclear structure of the cluster bands in ²⁰Ne presents a challenge for different theoretical approaches. It is especially difficult to explain the broad 0⁺, 2⁺ states at 9 MeV excitation energy. Simultaneously, it is important to obtain more reliable experimental data for these levels in order to quantitatively assess the theoretical framework. Purpose: To obtain new data on ²⁰Ne α- cluster structure. Method: Thick target inverse kinematics technique was used to study the ¹⁶O+α resonance elastic scattering and the data were analyzed using an R matrix approach. The ²⁰Ne spectrum, the cluster and nucleon spectroscopic factors were calculated using cluster-nucleon configuration interaction model (CNCIM). Results: We determined the parameters of the broad resonances in ²⁰Ne: 0⁺ level at 8.77 ± 0.150 MeV with a width of 750 $$^{+500}_{-220}$$ keV; 2⁺ level at 8.75 ± 0.100 MeV with the width of 695 ± 120 keV; the width of 9.48 MeV level of 65 ± 20 keV and showed that 9.19 MeV, 2⁺ level (if exists) should have width ≤ 10 keV. The detailed comparison of the theoretical CNCIM predictions with the experimental data on cluster states was made. Conclusions: Our experimental results by the TTIK method generally confirm the adopted data on α-cluster levels in ²⁰Ne. The CNCIM gives a good description of the ²⁰Ne positive parity states up to an excitation energy of ~7 MeV, predicting reasonably well the excitation energy of the states and their cluster and single particle properties. At higher excitations, the qualitative disagreement with the experimentally observed structure is evident, especially for broad resonances.

View Accepted Manuscript (DOE)

Research Organization:: Florida State Univ., Tallahassee, FL (United States)

Sponsoring Organization:: Ministry of Education and Science of the Republic of Kazakhstan; Ministry of Education and Science of the Republic of Kazakhstan; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Welch Foundation

Grant/Contract Number:: FG02-93ER40773; SC0009883

OSTI ID:: 1594031

Alternate ID(s):: OSTI ID: 1536115
OSTI ID: 1373317

Journal Information:: Physical Review C, Journal Name: Physical Review C Journal Issue: 1 Vol. 96; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Study of clustering in isotopes of beryllium Kravvaris, Konstantinos; Volya, Alexander 6TH INTERNATIONAL CONFERENCE ON PRODUCTION, ENERGY AND RELIABILITY 2018: World Engineering Science & Technology Congress (ESTCON), AIP Conference Proceedings https://doi.org/10.1063/1.5078845	conference	January 2018
Clustering in structure and reactions using configuration interaction techniques Kravvaris, Konstantinos; Volya, Alexander Physical Review C, Vol. 100, Issue 3 https://doi.org/10.1103/physrevc.100.034321	journal	September 2019
α-cluster structure above double closed shells Ibrahim, T. T.; Merchant, A. C.; Perez, S. M. Physical Review C, Vol. 99, Issue 6 https://doi.org/10.1103/physrevc.99.064332	journal	June 2019
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