Narrowing of the neutron <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>s</mml:mi><mml:mi>d</mml:mi><mml:mtext>–</mml:mtext><mml:mi>p</mml:mi><mml:mi>f</mml:mi></mml:math> shell gap in 29Na

Hurst, A. M.; Wu, C. Y.; Becker, J. A.; Stoyer, M. A.; Pearson, C. J.; Hackman, G.; Schumaker, M. A.; Svensson, C. E.; Austin, R. A. E.; Ball, G.; Bandyopadhyay, D.; Barton, C. J.; Boston, Andrew; Boston, H. C.; Churchman, R.; Cline, D.; Colosimo, S.; Cross, D. S.; Demand, G. A.; Djongolov, M.; Drake, T.E.; Garrett, P. E.; Gray‐Jones, C.; Green, K.L.; Grint, A. N.; Hayes, A. B.; Leach, K. G.; Kulp, W. D.; Lee, G.; Lloyd, S. L.; Maharaj, Ritesh; Martín, J. P.; Millar, B; Mythili, S.; Nelson, L.; Nolan, P. J.; Oxley, D.C.; Padilla‐Rodal, E.; Phillips, A. A.; Porter-Peden, M.; Rigby, S. V.; Sarazin, F.; Sumithrarachchi, C.; Triambak, S.; Walker, P. M.; Williams, Spencer J.; Wong, J.; Wood, John L.

doi:10.1016/j.physletb.2009.03.017

Cited by 28 publications

(43 citation statements)

References 34 publications

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“…29,30 Na belong to vicinity of 'island of inversion' [7]. Many theoretical [8] and experimental [9,10] studies have been performed to study the ground state configuration of these nuclei. Hurst et al [9] derived reduced transition matrix elements of excited states in 29 Na and suggested significant admixture of both sd and p f components in the wave function.…”

Section: Introductionmentioning

confidence: 99%

“…Many theoretical [8] and experimental [9,10] studies have been performed to study the ground state configuration of these nuclei. Hurst et al [9] derived reduced transition matrix elements of excited states in 29 Na and suggested significant admixture of both sd and p f components in the wave function. Tripathi et al have studied the low-energy level structure of the exotic 27−29 Na isotopes through β delayed γ spectroscopy [10].…”

Section: Introductionmentioning

confidence: 99%

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Study of Ground State Wave-function of the Neutron-rich^29,30Na Isotopes through Coulomb Breakup

Rahaman

Pramanik

Aumann

et al. 2014

EPJ Web of Conferences

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Abstract.Coulomb breakup of unstable neutron rich nuclei 29,30 Na around the 'island of inversion' has been studied at energy around 434 MeV/nucleon and 409 MeV/nucleon respectively. Four momentum vectors of fragments, decay neutron from excited projectile and γ-rays emitted from excited fragments after Coulomb breakup are measured in coincidence. For these nuclei, the low-lying dipole strength above one neutron threshold can be explained by direct breakup model. The analysis for Coulomb breakup of 29,30 Na shows that large amount of the cross section yields the 28 Na, 29 Na core in ground state. The predominant ground-state configuration of 29,30 Na is found to be 28 Na(g.s) ⊗ ν s 1/2 and 29 Na(g.s) ⊗ ν s 1/2 , respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Ground State Wave-function of the Neutron-rich^29,30Na Isotopes through Coulomb Breakup

Rahaman

Pramanik

Aumann

et al. 2014

EPJ Web of Conferences

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“…Three 11 Be beams with intensities of >10 6 ions/second were accelerated to 1.73, 2.09 and 3.82 MeV/nucleon. A 2.92 mg/cm 2 platinum target enriched to 94.57% in 196 Pt was used to scatter the 11 Be beam into the Bambino array, 12 which consisted of two double sided segmented 140-µm thick Si ∆E detectors. Gamma rays emitted from the excited projectile/target were measured in coincidence with charge particles using 12 high purity germanium clover detectors TIGRESS 13 which encapsulated the Si detectors.…”

Section: Methodsmentioning

confidence: 99%

PRECISION MEASUREMENTS OF THE B(E1) STRENGTHS IN ¹¹Be

Kwan¹,

Wu²,

Summers³

et al. 2013

Fission and Properties of Neutron-Rich Nuclei

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The electromagnetic transition strength between the two bound states were measured in the one-neutron halo nucleus 11 Be from Coulomb excitation on 196 Pt at projectile energies of 1.727 and 2.086 MeV/nucleon at TRIUMF. A B(E1) strength of 0.102(2) e 2 fm 2 , deduced from the forward-scattering data, is consistent with previous Coulomb excitation measurements at intermediate projectile energies with a model-dependent analysis.

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“…More recently it could be confirmed that already at N = 19 the wave functions of the ground and low-lying states contain a dominant admixture of intruder configurations [21][22][23]. For the neighboring N = 18,19 Na isotopes, 29,30 Na, measurements of the magnetic dipole moments and electric quadrupole moments revealed significant deviations from the universal sd-shell (USD) model [24,25], indicating a dramatic change in the underlying shell structure also for these nuclei.…”

Section: Introductionmentioning

confidence: 98%

“…To this end Coulomb-excitation experiments, employing radioactive 29,30 Na beams with a final beam energy of 2.85 MeV/nucleon, were performed at REX-ISOLDE, CERN. De-excitation γ rays were detected by the MINIBALL γ -ray spectrometer in coincidence with scattered particles in a segmented Si detector.…”

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confidence: 99%

Coulomb excitation of29,30Na: Mapping the borders of the island of inversion

Seidlitz¹,

Reiter²,

Altenkirch³

et al. 2014

Phys. Rev. C

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Nuclear shell evolution in neutron-rich Na nuclei around N = 20 was studied by determining reduced transition probabilities, i.e., B(E2) and B(M1) values, in order to map the border of the island of inversion. To this end Coulomb-excitation experiments, employing radioactive 29,30 Na beams with a final beam energy of 2.85 MeV/nucleon, were performed at REX-ISOLDE, CERN. De-excitation γ rays were detected by the MINIBALL γ -ray spectrometer in coincidence with scattered particles in a segmented Si detector. Transition probabilities to excited states were deduced. The measured B(E2) values agree well with shell-model predictions, supporting the idea that in the Na isotopic chain the ground-state wave function contains significant intruder admixture already at N = 18, with N = 19 having an almost pure two-particle-two-hole deformed ground-state configuration.

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Narrowing of the neutron sd–pf shell gap in 29Na

Cited by 28 publications

References 34 publications

Study of Ground State Wave-function of the Neutron-rich^29,30Na Isotopes through Coulomb Breakup

Study of Ground State Wave-function of the Neutron-rich^29,30Na Isotopes through Coulomb Breakup

PRECISION MEASUREMENTS OF THE B(E1) STRENGTHS IN ¹¹Be

Coulomb excitation of29,30Na: Mapping the borders of the island of inversion

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Narrowing of the neutron sd–pf shell gap in 29Na

Cited by 28 publications

References 34 publications

Study of Ground State Wave-function of the Neutron-rich29,30Na Isotopes through Coulomb Breakup

Study of Ground State Wave-function of the Neutron-rich29,30Na Isotopes through Coulomb Breakup

PRECISION MEASUREMENTS OF THE B(E1) STRENGTHS IN 11Be

Coulomb excitation of29,30Na: Mapping the borders of the island of inversion

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Study of Ground State Wave-function of the Neutron-rich^29,30Na Isotopes through Coulomb Breakup

Study of Ground State Wave-function of the Neutron-rich^29,30Na Isotopes through Coulomb Breakup

PRECISION MEASUREMENTS OF THE B(E1) STRENGTHS IN ¹¹Be