Triple configuration coexistence in S44

D. Santiago-Gonzalez; I. Wiedenhöver; V. Abramkina; M. L. Avila; T. Baugher; D. Bazin; B. A. Brown; P. D. Cottle; A. Gade; T. Glasmacher; K. W. Kemper; S. McDaniel; A. Rojas; A. Ratkiewicz; R. Meharchand; E. C. Simpson; J. A. Tostevin; A. Volya; D. Weisshaar

doi:10.1103/PhysRevC.83.061305

Triple configuration coexistence in S44

D. Santiago-Gonzalez^*, I. Wiedenhöver, V. Abramkina, M. L. Avila, T. Baugher, D. Bazin, B. A. Brown, P. D. Cottle, A. Gade, T. Glasmacher, K. W. Kemper, S. McDaniel, A. Rojas, A. Ratkiewicz, R. Meharchand, E. C. Simpson, J. A. Tostevin, A. Volya, D. Weisshaar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

The neutron-rich N=28 nucleus S44 was studied using the two-proton knockout reaction from Ar46 at intermediate beam energy. We report the observation of four new excited states, one of which is a strongly prolate deformed 4 ⁺ state, as indicated by a shell-model calculation. Its deformation originates in a neutron configuration which is fundamentally different from the "intruder" configuration responsible for the ground-state deformation. Consequently, we do not have three coexisting shapes in S44, but three coexisting configurations, corresponding to zero-, one-, and two-neutron particle-hole excitations.

Original language	English
Article number	061305
Journal	Physical Review C - Nuclear Physics
Volume	83
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.83.061305
Publication status	Published - 15 Jun 2011
Externally published	Yes

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Santiago-Gonzalez, D., Wiedenhöver, I., Abramkina, V., Avila, M. L., Baugher, T., Bazin, D., Brown, B. A., Cottle, P. D., Gade, A., Glasmacher, T., Kemper, K. W., McDaniel, S., Rojas, A., Ratkiewicz, A., Meharchand, R., Simpson, E. C., Tostevin, J. A., Volya, A., & Weisshaar, D. (2011). Triple configuration coexistence in S44. Physical Review C - Nuclear Physics, 83(6), Article 061305. https://doi.org/10.1103/PhysRevC.83.061305

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title = "Triple configuration coexistence in S44",

abstract = "The neutron-rich N=28 nucleus S44 was studied using the two-proton knockout reaction from Ar46 at intermediate beam energy. We report the observation of four new excited states, one of which is a strongly prolate deformed 4 + state, as indicated by a shell-model calculation. Its deformation originates in a neutron configuration which is fundamentally different from the {"}intruder{"} configuration responsible for the ground-state deformation. Consequently, we do not have three coexisting shapes in S44, but three coexisting configurations, corresponding to zero-, one-, and two-neutron particle-hole excitations.",

author = "D. Santiago-Gonzalez and I. Wiedenh{\"o}ver and V. Abramkina and Avila, {M. L.} and T. Baugher and D. Bazin and Brown, {B. A.} and Cottle, {P. D.} and A. Gade and T. Glasmacher and Kemper, {K. W.} and S. McDaniel and A. Rojas and A. Ratkiewicz and R. Meharchand and Simpson, {E. C.} and Tostevin, {J. A.} and A. Volya and D. Weisshaar",

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Santiago-Gonzalez, D, Wiedenhöver, I, Abramkina, V, Avila, ML, Baugher, T, Bazin, D, Brown, BA, Cottle, PD, Gade, A, Glasmacher, T, Kemper, KW, McDaniel, S, Rojas, A, Ratkiewicz, A, Meharchand, R, Simpson, EC, Tostevin, JA, Volya, A & Weisshaar, D 2011, 'Triple configuration coexistence in S44', Physical Review C - Nuclear Physics, vol. 83, no. 6, 061305. https://doi.org/10.1103/PhysRevC.83.061305

TY - JOUR

T1 - Triple configuration coexistence in S44

AU - Santiago-Gonzalez, D.

AU - Wiedenhöver, I.

AU - Abramkina, V.

AU - Avila, M. L.

AU - Baugher, T.

AU - Bazin, D.

AU - Brown, B. A.

AU - Cottle, P. D.

AU - Gade, A.

AU - Glasmacher, T.

AU - Kemper, K. W.

AU - McDaniel, S.

AU - Rojas, A.

AU - Ratkiewicz, A.

AU - Meharchand, R.

AU - Simpson, E. C.

AU - Tostevin, J. A.

AU - Volya, A.

AU - Weisshaar, D.

PY - 2011/6/15

Y1 - 2011/6/15

N2 - The neutron-rich N=28 nucleus S44 was studied using the two-proton knockout reaction from Ar46 at intermediate beam energy. We report the observation of four new excited states, one of which is a strongly prolate deformed 4 + state, as indicated by a shell-model calculation. Its deformation originates in a neutron configuration which is fundamentally different from the "intruder" configuration responsible for the ground-state deformation. Consequently, we do not have three coexisting shapes in S44, but three coexisting configurations, corresponding to zero-, one-, and two-neutron particle-hole excitations.

AB - The neutron-rich N=28 nucleus S44 was studied using the two-proton knockout reaction from Ar46 at intermediate beam energy. We report the observation of four new excited states, one of which is a strongly prolate deformed 4 + state, as indicated by a shell-model calculation. Its deformation originates in a neutron configuration which is fundamentally different from the "intruder" configuration responsible for the ground-state deformation. Consequently, we do not have three coexisting shapes in S44, but three coexisting configurations, corresponding to zero-, one-, and two-neutron particle-hole excitations.

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U2 - 10.1103/PhysRevC.83.061305

DO - 10.1103/PhysRevC.83.061305

M3 - Article

SN - 0556-2813

VL - 83

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 6

M1 - 061305

ER -

Triple configuration coexistence in S44

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