Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets

G. de Angelis; K.T. Wiedemann; T. Martinez; R. Orlandi; A. Petrovici; E. Sahin; J.J. Valiente-Dobon; D. Tonev; S. Lunardi; B.S. Nara Singh; R. Wadsworth; A. Gadea; K. Kaneko; P.G. Bizzeti; A.M. Bizzeti-Sona; B. Blank; A. Bracco; M.P. Carpenter; C.J. Chiara; E. Farnea; A. Gottardo; J.P. Greene; S.M. Lenzi; S. Leoni; C.J. Lister; D. Mengoni; D.R. Napoli; O.L. Pechenaya; F. Recchia; W. Reviol; D.G. Sarantites; D. Seweryniak; C.A. Ur; S. Zhu

doi:10.1103/PhysRevC.85.034320

Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets

G. de Angelis, K.T. Wiedemann, T. Martinez, R. Orlandi, A. Petrovici, E. Sahin, J.J. Valiente-Dobon, D. Tonev, S. Lunardi, B.S. Nara Singh, R. Wadsworth, A. Gadea, K. Kaneko, P.G. Bizzeti, A.M. Bizzeti-Sona, B. Blank, A. Bracco, M.P. Carpenter, C.J. Chiara, E. FarneaA. Gottardo, J.P. Greene, S.M. Lenzi, S. Leoni, C.J. Lister, D. Mengoni, D.R. Napoli, O.L. Pechenaya, F. Recchia, W. Reviol, D.G. Sarantites, D. Seweryniak, C.A. Ur, S. Zhu

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Abstract

Excited states of the N=Z=33 nucleus 66As have been populated in a fusion-evaporation reaction and studied using γ-ray spectroscopic techniques. Special emphasis was put into the search for candidates for the T=1 states. A new 3+ isomer has been observed with a lifetime of 1.1(3) ns. This is believed to be the predicted oblate shape isomer. The excited levels are discussed in terms of the shell model and of the complex excited Vampir approaches. Coulomb energy differences are determined from the comparison of the T=1states with their analog partners. The unusual behavior of the Coulomb energy differences in the A=70 mass region is explained through different shape components (oblate and prolate) within the members of the same isospin multiplets. This breaking of the isospin symmetry is attributed to the correlations induced by the Coulomb interaction.

Original language	English
Article number	034320
Journal	Physical Review C
Volume	85
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.85.034320
Publication status	Published - 20 Mar 2012
Externally published	Yes

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de Angelis, G., Wiedemann, K. T., Martinez, T., Orlandi, R., Petrovici, A., Sahin, E., Valiente-Dobon, J. J., Tonev, D., Lunardi, S., Nara Singh, B. S., Wadsworth, R., Gadea, A., Kaneko, K., Bizzeti, P. G., Bizzeti-Sona, A. M., Blank, B., Bracco, A., Carpenter, M. P., Chiara, C. J., ... Zhu, S. (2012). Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets. Physical Review C, 85(3), Article 034320. https://doi.org/10.1103/PhysRevC.85.034320

@article{77e5e5cdf55b40ac9d4dd4fcdc80abf0,

title = "Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets",

abstract = "Excited states of the N=Z=33 nucleus 66As have been populated in a fusion-evaporation reaction and studied using γ-ray spectroscopic techniques. Special emphasis was put into the search for candidates for the T=1 states. A new 3+ isomer has been observed with a lifetime of 1.1(3) ns. This is believed to be the predicted oblate shape isomer. The excited levels are discussed in terms of the shell model and of the complex excited Vampir approaches. Coulomb energy differences are determined from the comparison of the T=1states with their analog partners. The unusual behavior of the Coulomb energy differences in the A=70 mass region is explained through different shape components (oblate and prolate) within the members of the same isospin multiplets. This breaking of the isospin symmetry is attributed to the correlations induced by the Coulomb interaction.",

author = "{de Angelis}, G. and K.T. Wiedemann and T. Martinez and R. Orlandi and A. Petrovici and E. Sahin and J.J. Valiente-Dobon and D. Tonev and S. Lunardi and {Nara Singh}, B.S. and R. Wadsworth and A. Gadea and K. Kaneko and P.G. Bizzeti and A.M. Bizzeti-Sona and B. Blank and A. Bracco and M.P. Carpenter and C.J. Chiara and E. Farnea and A. Gottardo and J.P. Greene and S.M. Lenzi and S. Leoni and C.J. Lister and D. Mengoni and D.R. Napoli and O.L. Pechenaya and F. Recchia and W. Reviol and D.G. Sarantites and D. Seweryniak and C.A. Ur and S. Zhu",

year = "2012",

month = mar,

day = "20",

doi = "10.1103/PhysRevC.85.034320",

language = "English",

volume = "85",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

de Angelis, G, Wiedemann, KT, Martinez, T, Orlandi, R, Petrovici, A, Sahin, E, Valiente-Dobon, JJ, Tonev, D, Lunardi, S, Nara Singh, BS, Wadsworth, R, Gadea, A, Kaneko, K, Bizzeti, PG, Bizzeti-Sona, AM, Blank, B, Bracco, A, Carpenter, MP, Chiara, CJ, Farnea, E, Gottardo, A, Greene, JP, Lenzi, SM, Leoni, S, Lister, CJ, Mengoni, D, Napoli, DR, Pechenaya, OL, Recchia, F, Reviol, W, Sarantites, DG, Seweryniak, D, Ur, CA & Zhu, S 2012, 'Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets', Physical Review C, vol. 85, no. 3, 034320. https://doi.org/10.1103/PhysRevC.85.034320

TY - JOUR

T1 - Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets

AU - de Angelis, G.

AU - Wiedemann, K.T.

AU - Martinez, T.

AU - Orlandi, R.

AU - Petrovici, A.

AU - Sahin, E.

AU - Valiente-Dobon, J.J.

AU - Tonev, D.

AU - Lunardi, S.

AU - Nara Singh, B.S.

AU - Wadsworth, R.

AU - Gadea, A.

AU - Kaneko, K.

AU - Bizzeti, P.G.

AU - Bizzeti-Sona, A.M.

AU - Blank, B.

AU - Bracco, A.

AU - Carpenter, M.P.

AU - Chiara, C.J.

AU - Farnea, E.

AU - Gottardo, A.

AU - Greene, J.P.

AU - Lenzi, S.M.

AU - Leoni, S.

AU - Lister, C.J.

AU - Mengoni, D.

AU - Napoli, D.R.

AU - Pechenaya, O.L.

AU - Recchia, F.

AU - Reviol, W.

AU - Sarantites, D.G.

AU - Seweryniak, D.

AU - Ur, C.A.

AU - Zhu, S.

PY - 2012/3/20

Y1 - 2012/3/20

N2 - Excited states of the N=Z=33 nucleus 66As have been populated in a fusion-evaporation reaction and studied using γ-ray spectroscopic techniques. Special emphasis was put into the search for candidates for the T=1 states. A new 3+ isomer has been observed with a lifetime of 1.1(3) ns. This is believed to be the predicted oblate shape isomer. The excited levels are discussed in terms of the shell model and of the complex excited Vampir approaches. Coulomb energy differences are determined from the comparison of the T=1states with their analog partners. The unusual behavior of the Coulomb energy differences in the A=70 mass region is explained through different shape components (oblate and prolate) within the members of the same isospin multiplets. This breaking of the isospin symmetry is attributed to the correlations induced by the Coulomb interaction.

AB - Excited states of the N=Z=33 nucleus 66As have been populated in a fusion-evaporation reaction and studied using γ-ray spectroscopic techniques. Special emphasis was put into the search for candidates for the T=1 states. A new 3+ isomer has been observed with a lifetime of 1.1(3) ns. This is believed to be the predicted oblate shape isomer. The excited levels are discussed in terms of the shell model and of the complex excited Vampir approaches. Coulomb energy differences are determined from the comparison of the T=1states with their analog partners. The unusual behavior of the Coulomb energy differences in the A=70 mass region is explained through different shape components (oblate and prolate) within the members of the same isospin multiplets. This breaking of the isospin symmetry is attributed to the correlations induced by the Coulomb interaction.

U2 - 10.1103/PhysRevC.85.034320

DO - 10.1103/PhysRevC.85.034320

M3 - Article

SN - 2469-9985

VL - 85

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 034320

ER -

Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus As-66 and neighboring T=1 multiplets

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