Single-particle structure of silicon isotopes approaching<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">Si</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>42</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Stroberg, S. R.; Gade, A.; Tostevin, J. A.; Bader, V. M.; Baugher, T.; Bazin, D.; Berryman, J. S.; Brown, B. A.; Campbell, C. M.; Kemper, K. W.; Langer, C.; Lunderberg, E.; Lemasson, A.; Noji, S.; Recchia, F.; Walz, C.; Weißhaar, D.; Williams, S. J.

doi:10.1103/physrevc.90.034301

Cited by 58 publications

(60 citation statements)

References 54 publications

(98 reference statements)

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“…This spin and parity has been used to explain the data of β decay [19] as well as the knockout experiment [29]. A number of excited states of this nucleus have been populated [23] by proton knockout, and the states have been interpreted in the light of the SDPF-MU interaction [41]. According to the conventional shell model with neutron number N = 22, the valence neutron should occupy the f 7/2 orbital.…”

Section: Discussionmentioning

confidence: 99%

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Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Chakraborty¹,

Pramanik²,

Aumann³

et al. 2017

Phys. Rev. C

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The ground-state configuration of 35 Al has been studied via Coulomb dissociation (CD) using the LAND-FRS setup (GSI, Darmstadt) at a relativistic energy of ∼403 MeV/nucleon. The measured inclusive differential CD cross section for 35 Al, integrated up to 5.0 MeV relative energy between the 34 Al core and the neutron using a Pb target, is 78(13) mb. The exclusive measured CD cross section that populates various excited states of 34 Al is 29(7) mb. The differential CD cross section of 35 Al → 34 Al + n has been interpreted in the light of a direct breakup model, and it suggests that the possible ground-state spin and parity of 35 Al could be, tentatively, 1/2 + or 3/2 + or 5/2 + . The valence neutrons, in the ground state of 35 Al, may occupy a combination of either l = 3,0 or l = 1,2 orbitals coupled with the 34 Al core in the ground and isomeric state(s), respectively. This hints of a particle-hole configuration of the neutron across the magic shell gaps at N = 20,28 which suggests narrowing the magic shell gap. If the 5/2 + is the ground-state spin-parity of 35 Al as suggested in the literature, then the major ground-state configuration of 35 Al is a combination of 34 Al(g.s.; 4 − ) ⊗ ν p 3/2 and 34 Al(isomer; 1 + ) ⊗ ν d 3/2 states. The result from this experiment has been compared with that from a previous knockout measurement and a calculation using the SDPF-M interaction.

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Section: Discussionmentioning

confidence: 99%

“…The β-decay branch of 35 Al was studied at ISOLDE [19,20] and GANIL [21]. Some deexcited γ rays of 35 Al have been reported [22,23]. The extracted B(E2) value is 142(52) e 2 fm 4 [22].…”

Section: Introductionmentioning

confidence: 99%

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Chakraborty¹,

Pramanik²,

Aumann³

et al. 2017

Phys. Rev. C

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“…If the 1/2 − and 3/2 − states were indeed at 1302 and 1611 keV, we would have observed all low-lying negative-parity states below 2.2 MeV consistent with the systematics of excited states populated in fragmentation. However, positive parity-states, corresponding to neutron cross-shell excitations across N = 20 as discussed for the Si isotopic chain [40], may be found at low excitation energy as well. A 3/2 + level would be expected to decay to the (5/2 − ) ground state and would have been strongly populated in the β decay of the positive-parity ground state.…”

Section: Dmentioning

confidence: 99%

“…10. The level density in 40 S is predicted to increase significantly at about 3 MeV. The many weak transitions not placed within the level scheme will originate from the multitude of states in this excitation energy region.…”

Section: Cmentioning

confidence: 99%

“…It was pointed out by Utsuno et al [3] that tensor-driven shell evolution plays a critical role in the rapid shape transitions that occur in the S and Si isotopic chains towards N = 28. These effects are included in the SDPF-MU effective shell-model interaction introduced in [3] and the resulting predictions for the 40,41,42 S level schemes will be tested in the present work. The sulfur isotopes between N = 20 and N = 28 have been studied with a variety of experimental techniques [10][11][12][13][14][15][16][17][18][19][20], however, information on the level schemes even at low excitation energy is still scarce.…”

Section: Introductionmentioning

confidence: 99%

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In-beam γ -ray spectroscopy of S38–42

et al. 2016

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The low-energy excitation level schemes of the neutron-rich 38−42 S isotopes are investigated via in-beam γ-ray spectroscopy following the fragmentation of 48 Ca and 46 Ar projectiles on a 12 C target at intermediate beam energies. Information on γγ coincidences complemented by comparisons to shell-model calculations were used to construct level schemes for these neutron-rich nuclei. The experimental data are discussed in the context of large-scale shell-model calculations with the SDPF-MU effective interaction in the sd-pf shell. For the even-mass S isotopes, the evolution of the yrast sequence is explored as well as a peculiar change in decay pattern of the second 2 + states at N = 26. For the odd-mass 41 S, a level scheme is presented that seems complete below 2.2 MeV and consistent with the predictions by the SDPF-MU shell-model Hamiltonian; this is a remarkable benchmark given the rapid shell and shape evolution at play in the S isotopes as the broken-down N = 28 magic number is approached. Furthermore, the population of excited final states in projectile fragmentation is discussed.

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Excited Nuclear States for Al-35 (Aluminium)

Sukhoruchkin¹,

Soroko²

2016

Supplement to I/25 a-F

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Single-particle structure of silicon isotopes approachingSi42

Cited by 58 publications

References 54 publications

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

Ground-state configuration of neutron-rich Al35 via Coulomb breakup

In-beam γ -ray spectroscopy of S38–42

Excited Nuclear States for Al-35 (Aluminium)

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