Coulomb excitation of radioactive<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Na</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>21</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and its stable mirror<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ne</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>21</mml:mn></mml:mrow></mml:mmultiscript

Schumaker, M. A.; Cline, D.; Hackman, G.; Morton, A. C.; Pearson, C. J.; Svensson, C. E.; Wu, C. Y.; Andreyev, A. N.; Austin, R. A. E.; Ball, G.; Bandyopadhyay, D.; Becker, J. A.; Boston, Andrew; Boston, H. C.; Buchmann, L.; Churchman, R.; Cifarelli, F.; Cooper, R. J.; Cross, D. S.; Dashdorj, D.; Demand, G. A.; Dimmock, Matthew; Drake, T.E.; Finlay, P.; Gallant, A. T.; Garrett, P. E.; Green, K. L.; Grint, A. N.; Grinyer, G. F.; Harkness, L. J.; Hayes, A. B.; Kanungo, R.; Leach, K. G.; Lee, G.; Maharaj, Ritesh; Martín, J. P.; Moisan, F.; Mythili, S.; Nelson, L.; Newman, O.; Nolan, P. J.; Orce, J. N.; Padilla‐Rodal, E.; Phillips, A. A.; Porter-Peden, M.; Ressler, J. J.; Roy, R.; Ruiz, C.; Sarazin, F.; Scraggs, D.P.; Waddington, J. C.; Wan, J. M.; Whitbeck, A.; Williams, Spencer J.; Wong, J.

doi:10.1103/physrevc.78.044321

Cited by 20 publications

(11 citation statements)

References 44 publications

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“…The first accelerated RIB experiment with TIGRESS at ISAC investigated the structure of 21 Na, together with its well-known stable mirror nucleus 21 Ne, via low-energy Coulomb excitation [125]. The primary motivation for this experiment was to improve knowledge of transition matrix elements in radioactive 21 Na, for which the B(E2) connecting the 3 was both highly uncertain due to the uncertainty in the mixing ratio for the de-exciting γ -ray transition [126] and, in comparison with the more precisely measured mirror transition in 21 Ne, B(E2; 3 2 + → 5 2 + ) = 24 ± 3 W.u., in contradiction with the universal prediction of the sd-shell model calculations with standard effective charges that the B(E2) for this transition should be larger in the more proton-rich member of the mirror pair, 21 Na.…”

Section: Na and Its Mirror 21 Nementioning

confidence: 99%

“…To investigate these issues, a stable beam of 21 Ne and a radioactive beam of 21 Na, each of ∼5 × 10 6 ion s −1 intensity, were accelerated to 1.7 A MeV by the ISAC-I accelerator system, Coulomb excited in a 0.5 mg cm −2 natural Ti target, and studied with the first two TIGRESS HPGe clover detectors positioned at 90 • to the beam axis [125]. Crucial to these measurements, and to all of the TIGRESS results presented here, was the BAMBINO detector.…”

Section: Na and Its Mirror 21 Nementioning

confidence: 99%

“…20 Na on the proton dripline 20 Na (T 1/2 = 448 ms) is the most neutron-deficient particle-bound isotope of Na and plays an important role in the breakout from the carbon-nitrogen-oxygen (CNO) cycle into the rapid proton capture (rp)-process via the 15 O(α,γ ) 19 Ne(p,γ ) 20 Na reaction chain [131]. The level structure of 20 Na below the proton separation energy has been studied in detail via in-beam γ -ray spectroscopy following fusion evaporation [132], and levels above the proton separation energy have been studied via the 20 Adapted from [125]. γ -ray spectra Doppler corrected for γ -ray emission from the projectile (upper) and target (lower) nuclei, for the experiment with a stable 21 Ne beam (left) and a radioactive 21 Na beam (right).…”

Section: Na and Its Mirror 21 Nementioning

confidence: 99%

See 2 more Smart Citations

Physics with reaccelerated radioactive beams at TRIUMF-ISAC

Ball

Buchmann

Davids

et al. 2011

J. Phys. G: Nucl. Part. Phys.

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The TRIUMF-ISAC radioactive beam facility provides reaccelerated beams in the energy range from 0.15 to 5 A MeV for A < 30 to a full suite of world class experimental apparatus, enabling a forefront research program focused on understanding the evolution of nuclear structure towards the limits of existence and the origin of the chemical elements in the universe. Recent ISAC science highlights and future objectives are presented.

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Section: Na and Its Mirror 21 Nementioning

confidence: 99%

Section: Na and Its Mirror 21 Nementioning

confidence: 99%

Section: Na and Its Mirror 21 Nementioning

confidence: 99%

See 1 more Smart Citation

Physics with reaccelerated radioactive beams at TRIUMF-ISAC

Ball

Buchmann

Davids

et al. 2011

J. Phys. G: Nucl. Part. Phys.

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“…The quoted error on this measurement arises from the uncertainties of N P γ (3.5%) and ε P γ (3.1%). Other contributions are less significant and include the φ asymmetry of the TIGRESS detectors (< 0.5%) [55].…”

mentioning

confidence: 99%

Reorientation-effect measurement of the first 2+ state in 12C: Confirmation of oblate deformation

et al. 2018

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A Coulomb-excitation reorientation-effect measurement using the TIGRESS γ−ray spectrometer at the TRI-UMF/ISAC II facility has permitted the determination of the 2 + 1 ||Ê2 || 2 + 1 diagonal matrix element in 12 C from particle−γ coincidence data and state-of-the-art no-core shell model calculations of the nuclear polarizability. The nuclear polarizability for the ground and first-excited (2 + 1 ) states in 12 C have been calculated using chiral NN N 4 LO500 and NN+3NF350 interactions, which show convergence and agreement with photo-absorption cross-section data. Predictions show a change in the nuclear polarizability with a substantial increase between the ground state and first excited 2 + 1 state at 4.439 MeV. The polarizability of the 2 + 1 state is introduced into the current and previous Coulombexcitation reorientation-effect analyses of 12 C. Spectroscopic quadrupole moments of Q S (2 + 1 ) = +0.053(44) eb and Q S (2 + 1 ) = +0.08(3) eb are determined, respectively, yielding a weighted average of Q S (2 + 1 ) = +0.071(25) eb, in agreement with recent ab initio calculations. The present measurement confirms that the 2 + 1 state of 12 C is oblate and emphasizes the important role played by the nuclear polarizability in Coulomb-excitation studies of light nuclei.

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“…We discuss the isotope 20 Ne as the first of a series of examples centered around A = 20. This region of the chart has received significant experimental attention [69,70] due, among other things, to its relevance for astrophysics [71]. In theoretical studies, this region is typically accessed theoretically using the shell model and is of particular interest in the context of isospin symmetry breaking [72].…”

Section: Nementioning

confidence: 99%

Nuclear ground states in a consistent implementation of the time-dependent density matrix approach

Barton,

Stevenson,

Rios

2021

Preprint

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Background: Time-dependent techniques in nuclear theory often rely on mean-field or Hartree-Fock descriptions. Beyond mean-field dynamical calculations within the time-dependent density matrix (TDDM) theory have often invoked symmetry restrictions and ignored the connection between the mean-field and the induced interaction.Purpose: We study the ground states obtained in a TDDM approach for nuclei from A = 12 to A = 24, including examples of even and odd-even nuclei with and without intrinsic deformation. We overcome previous limitations using three-dimensional simulations and employ density-independent Skyrme interactions self-consistently. Methods:The correlated ground states are found starting from the Hartree-Fock solution, by adiabatically including the beyond-mean-field terms in real time.Results: We find that, within this approach, correlations are responsible for ≈ 4 − 5% of the total energy. Radii are generally unaffected by the introduction of beyond mean-field correlations. Large nuclear correlation entropies are associated to large correlation energies. By all measures, 12 C is the most correlated isotope in the mass region considered.Conclusions: Our work is the starting point of a consistent implementation of the TDDM technique for applications into nuclear reactions. Our results indicate that correlation effects in structure are small, but beyond-mean-field dynamical simulations could provide new insight into several issues of interest.

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Coulomb excitation of radioactiveNa21and its stable mirrorNe21

Cited by 20 publications

References 44 publications

Physics with reaccelerated radioactive beams at TRIUMF-ISAC

Physics with reaccelerated radioactive beams at TRIUMF-ISAC

Reorientation-effect measurement of the first 2+ state in 12C: Confirmation of oblate deformation

Nuclear ground states in a consistent implementation of the time-dependent density matrix approach

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