Shell and shape evolution at N=28: The Mg 40 ground state

H. L. Crawford; P. Fallon; A. O. MacChiavelli; R. M. Clark; B. A. Brown; J. A. Tostevin; D. Bazin; N. Aoi; P. Doornenbal; M. Matsushita; H. Scheit; D. Steppenbeck; S. Takeuchi; H. Baba; C. M. Campbell; M. Cromaz; E. Ideguchi; N. Kobayashi; Y. Kondo; G. Lee; I. Y. Lee; J. Lee; K. Li; S. Michimasa; T. Motobayashi; T. Nakamura; S. Ota; S. Paschalis; M. Petri; T. Sako; H. Sakurai; S. Shimoura; M. Takechi; Y. Togano; H. Wang; K. Yoneda

doi:10.1103/PhysRevC.89.041303

Shell and shape evolution at N=28: The Mg 40 ground state

H. L. Crawford^*, P. Fallon, A. O. MacChiavelli, R. M. Clark, B. A. Brown, J. A. Tostevin, D. Bazin, N. Aoi, P. Doornenbal, M. Matsushita, H. Scheit, D. Steppenbeck, S. Takeuchi, H. Baba, C. M. Campbell, M. Cromaz, E. Ideguchi, N. Kobayashi, Y. Kondo, G. LeeI. Y. Lee, J. Lee, K. Li, S. Michimasa, T. Motobayashi, T. Nakamura, S. Ota, S. Paschalis, M. Petri, T. Sako, H. Sakurai, S. Shimoura, M. Takechi, Y. Togano, H. Wang, K. Yoneda

^*Corresponding author for this work

Physics

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

Abstract

A measurement of the direct two-proton removal from Si42 has provided the first structural information on the N=28 isotone Mg40. The value for the inclusive cross section for two-proton removal from Si42 of 40-17+27 μb is significantly lower than that predicted by structure calculations using the recent SDPF-MU shell-model effective interaction combined with eikonal reaction theory. This observed discrepancy is consistent with the interpretation that only one of the predicted low-lying 0+ states in Mg40 is bound. A two-state mixing analysis describing two-proton knockout cross sections along N=28 provides support for the interpretation of a prolate-deformed Mg40 ground state.

Original language	English
Article number	041303
Number of pages	5
Journal	Physical Review C
Volume	89
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.89.041303
Publication status	Published - 30 Apr 2014

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10.1103/PhysRevC.89.041303

Cite this

Crawford, H. L., Fallon, P., MacChiavelli, A. O., Clark, R. M., Brown, B. A., Tostevin, J. A., Bazin, D., Aoi, N., Doornenbal, P., Matsushita, M., Scheit, H., Steppenbeck, D., Takeuchi, S., Baba, H., Campbell, C. M., Cromaz, M., Ideguchi, E., Kobayashi, N., Kondo, Y., ... Yoneda, K. (2014). Shell and shape evolution at N=28: The Mg 40 ground state. Physical Review C, 89(4), Article 041303. https://doi.org/10.1103/PhysRevC.89.041303

@article{6c8750c3fcda4a50911f51cc153872d3,

title = "Shell and shape evolution at N=28: The Mg 40 ground state",

abstract = "A measurement of the direct two-proton removal from Si42 has provided the first structural information on the N=28 isotone Mg40. The value for the inclusive cross section for two-proton removal from Si42 of 40-17+27 μb is significantly lower than that predicted by structure calculations using the recent SDPF-MU shell-model effective interaction combined with eikonal reaction theory. This observed discrepancy is consistent with the interpretation that only one of the predicted low-lying 0+ states in Mg40 is bound. A two-state mixing analysis describing two-proton knockout cross sections along N=28 provides support for the interpretation of a prolate-deformed Mg40 ground state.",

author = "Crawford, {H. L.} and P. Fallon and MacChiavelli, {A. O.} and Clark, {R. M.} and Brown, {B. A.} and Tostevin, {J. A.} and D. Bazin and N. Aoi and P. Doornenbal and M. Matsushita and H. Scheit and D. Steppenbeck and S. Takeuchi and H. Baba and Campbell, {C. M.} and M. Cromaz and E. Ideguchi and N. Kobayashi and Y. Kondo and G. Lee and Lee, {I. Y.} and J. Lee and K. Li and S. Michimasa and T. Motobayashi and T. Nakamura and S. Ota and S. Paschalis and M. Petri and T. Sako and H. Sakurai and S. Shimoura and M. Takechi and Y. Togano and H. Wang and K. Yoneda",

year = "2014",

month = apr,

day = "30",

doi = "10.1103/PhysRevC.89.041303",

language = "English",

volume = "89",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

Crawford, HL, Fallon, P, MacChiavelli, AO, Clark, RM, Brown, BA, Tostevin, JA, Bazin, D, Aoi, N, Doornenbal, P, Matsushita, M, Scheit, H, Steppenbeck, D, Takeuchi, S, Baba, H, Campbell, CM, Cromaz, M, Ideguchi, E, Kobayashi, N, Kondo, Y, Lee, G, Lee, IY, Lee, J, Li, K, Michimasa, S, Motobayashi, T, Nakamura, T, Ota, S, Paschalis, S , Petri, M, Sako, T, Sakurai, H, Shimoura, S, Takechi, M, Togano, Y, Wang, H & Yoneda, K 2014, 'Shell and shape evolution at N=28: The Mg 40 ground state', Physical Review C, vol. 89, no. 4, 041303. https://doi.org/10.1103/PhysRevC.89.041303

TY - JOUR

T1 - Shell and shape evolution at N=28

T2 - The Mg 40 ground state

AU - Crawford, H. L.

AU - Fallon, P.

AU - MacChiavelli, A. O.

AU - Clark, R. M.

AU - Brown, B. A.

AU - Tostevin, J. A.

AU - Bazin, D.

AU - Aoi, N.

AU - Doornenbal, P.

AU - Matsushita, M.

AU - Scheit, H.

AU - Steppenbeck, D.

AU - Takeuchi, S.

AU - Baba, H.

AU - Campbell, C. M.

AU - Cromaz, M.

AU - Ideguchi, E.

AU - Kobayashi, N.

AU - Kondo, Y.

AU - Lee, G.

AU - Lee, I. Y.

AU - Lee, J.

AU - Li, K.

AU - Michimasa, S.

AU - Motobayashi, T.

AU - Nakamura, T.

AU - Ota, S.

AU - Paschalis, S.

AU - Petri, M.

AU - Sako, T.

AU - Sakurai, H.

AU - Shimoura, S.

AU - Takechi, M.

AU - Togano, Y.

AU - Wang, H.

AU - Yoneda, K.

PY - 2014/4/30

Y1 - 2014/4/30

N2 - A measurement of the direct two-proton removal from Si42 has provided the first structural information on the N=28 isotone Mg40. The value for the inclusive cross section for two-proton removal from Si42 of 40-17+27 μb is significantly lower than that predicted by structure calculations using the recent SDPF-MU shell-model effective interaction combined with eikonal reaction theory. This observed discrepancy is consistent with the interpretation that only one of the predicted low-lying 0+ states in Mg40 is bound. A two-state mixing analysis describing two-proton knockout cross sections along N=28 provides support for the interpretation of a prolate-deformed Mg40 ground state.

AB - A measurement of the direct two-proton removal from Si42 has provided the first structural information on the N=28 isotone Mg40. The value for the inclusive cross section for two-proton removal from Si42 of 40-17+27 μb is significantly lower than that predicted by structure calculations using the recent SDPF-MU shell-model effective interaction combined with eikonal reaction theory. This observed discrepancy is consistent with the interpretation that only one of the predicted low-lying 0+ states in Mg40 is bound. A two-state mixing analysis describing two-proton knockout cross sections along N=28 provides support for the interpretation of a prolate-deformed Mg40 ground state.

U2 - 10.1103/PhysRevC.89.041303

DO - 10.1103/PhysRevC.89.041303

M3 - Article

AN - SCOPUS:84899730307

SN - 0556-2813

VL - 89

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 041303

ER -