Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os 196

P. R. John; V. Modamio; J. J. Valiente-Dobón; D. Mengoni; S. Lunardi; T. R. Rodríguez; D. Bazzacco; A. Gadea; C. Wheldon; T. Alexander; G. De Angelis; N. Ashwood; M. Barr; G. Benzoni; B. Birkenbach; P. G. Bizzeti; A. M. Bizzeti-Sona; S. Bottoni; M. Bowry; A. Bracco; F. Browne; M. Bunce; F. Camera; B. Cederwall; L. Corradi; F. C L Crespi; P. Désesquelles; J. Eberth; E. Farnea; E. Fioretto; A. Görgen; A. Gottardo; J. Grebosz; L. Grente; H. Hess; A. Jungclaus; Tzanka Kokalova Wheldon; A. Korichi; W. Korten; A. Kuşoǧlu; S. Lenzi; S. Leoni; J. Ljungvall; G. Maron; W. Meczynski; B. Melon; R. Menegazzo; C. Michelagnoli; T. Mijatović; B. Million; P. Molini; G. Montagnoli; D. Montanari; D. R. Napoli; P. Nolan; Ch Oziol; Zs Podolyák; G. Pollarolo; A. Pullia; B. Quintana; F. Recchia; P. Reiter; O. J. Roberts; D. Rosso; E. Şahin; M. D. Salsac; F. Scarlassara; M. Sferrazza; P. A. Söderström; A. M. Stefanini; O. Stezowski; S. Szilner; Ch Theisen; C. A. Ur; J. Walshe; John J Simpson

doi:10.1103/PhysRevC.90.021301

Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os 196

P. R. John^*, V. Modamio, J. J. Valiente-Dobón, D. Mengoni, S. Lunardi, T. R. Rodríguez, D. Bazzacco, A. Gadea, C. Wheldon, T. Alexander, G. De Angelis, N. Ashwood, M. Barr, G. Benzoni, B. Birkenbach, P. G. Bizzeti, A. M. Bizzeti-Sona, S. Bottoni, M. Bowry, A. BraccoF. Browne, M. Bunce, F. Camera, B. Cederwall, L. Corradi, F. C L Crespi, P. Désesquelles, J. Eberth, E. Farnea, E. Fioretto, A. Görgen, A. Gottardo, J. Grebosz, L. Grente, H. Hess, A. Jungclaus, Tzanka Kokalova Wheldon, A. Korichi, W. Korten, A. Kuşoǧlu, S. Lenzi, S. Leoni, J. Ljungvall, G. Maron, W. Meczynski, B. Melon, R. Menegazzo, C. Michelagnoli, T. Mijatović, B. Million, P. Molini, G. Montagnoli, D. Montanari, D. R. Napoli, P. Nolan, Ch Oziol, Zs Podolyák, G. Pollarolo, A. Pullia, B. Quintana, F. Recchia, P. Reiter, O. J. Roberts, D. Rosso, E. Şahin, M. D. Salsac, F. Scarlassara, M. Sferrazza, P. A. Söderström, A. M. Stefanini, O. Stezowski, S. Szilner, Ch Theisen, C. A. Ur, J. Walshe, John J Simpson

^*Corresponding author for this work

Physics and Astronomy

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Abstract

The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states.

Original language	English
Article number	021301
Journal	Physical Review C
Volume	90
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.90.021301
Publication status	Published - 13 Aug 2014

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.90.021301

John_et_al_Shape_evolution_Physical_review_C
Published as detailed above and available online at: http://dx.doi.org/10.1103/PhysRevC.90.021301
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Birmingham Nuclear Physics Consolidated Grant
Freer, M., Evans, P., Jones, P., Wheldon, C. & Lazzeroni, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/11 → 31/07/14
Project: Research Councils
Advanced Fellowship - Dr Carl Wheldon
Wheldon, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
29/10/07 → 28/10/12
Project: Research

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John, P. R., Modamio, V., Valiente-Dobón, J. J., Mengoni, D., Lunardi, S., Rodríguez, T. R., Bazzacco, D., Gadea, A., Wheldon, C., Alexander, T., De Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., ... Simpson, J. J. (2014). Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os 196. Physical Review C, 90(2), Article 021301. https://doi.org/10.1103/PhysRevC.90.021301

@article{7f070af8c79a4eb1a74514dd5f2b7de9,

title = "Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os 196",

abstract = "The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states.",

author = "John, {P. R.} and V. Modamio and Valiente-Dob{\'o}n, {J. J.} and D. Mengoni and S. Lunardi and Rodr{\'i}guez, {T. R.} and D. Bazzacco and A. Gadea and C. Wheldon and T. Alexander and {De Angelis}, G. and N. Ashwood and M. Barr and G. Benzoni and B. Birkenbach and Bizzeti, {P. G.} and Bizzeti-Sona, {A. M.} and S. Bottoni and M. Bowry and A. Bracco and F. Browne and M. Bunce and F. Camera and B. Cederwall and L. Corradi and Crespi, {F. C L} and P. D{\'e}sesquelles and J. Eberth and E. Farnea and E. Fioretto and A. G{\"o}rgen and A. Gottardo and J. Grebosz and L. Grente and H. Hess and A. Jungclaus and {Kokalova Wheldon}, Tzanka and A. Korichi and W. Korten and A. Ku{\c s}oǧlu and S. Lenzi and S. Leoni and J. Ljungvall and G. Maron and W. Meczynski and B. Melon and R. Menegazzo and C. Michelagnoli and T. Mijatovi{\'c} and B. Million and P. Molini and G. Montagnoli and D. Montanari and Napoli, {D. R.} and P. Nolan and Ch Oziol and Zs Podoly{\'a}k and G. Pollarolo and A. Pullia and B. Quintana and F. Recchia and P. Reiter and Roberts, {O. J.} and D. Rosso and E. {\c S}ahin and Salsac, {M. D.} and F. Scarlassara and M. Sferrazza and S{\"o}derstr{\"o}m, {P. A.} and Stefanini, {A. M.} and O. Stezowski and S. Szilner and Ch Theisen and Ur, {C. A.} and J. Walshe and Simpson, {John J}",

year = "2014",

month = aug,

day = "13",

doi = "10.1103/PhysRevC.90.021301",

language = "English",

volume = "90",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society (APS)",

number = "2",

}

John, PR, Modamio, V, Valiente-Dobón, JJ, Mengoni, D, Lunardi, S, Rodríguez, TR, Bazzacco, D, Gadea, A, Wheldon, C, Alexander, T, De Angelis, G, Ashwood, N, Barr, M, Benzoni, G, Birkenbach, B, Bizzeti, PG, Bizzeti-Sona, AM, Bottoni, S, Bowry, M, Bracco, A, Browne, F, Bunce, M, Camera, F, Cederwall, B, Corradi, L, Crespi, FCL, Désesquelles, P, Eberth, J, Farnea, E, Fioretto, E, Görgen, A, Gottardo, A, Grebosz, J, Grente, L, Hess, H, Jungclaus, A, Kokalova Wheldon, T, Korichi, A, Korten, W, Kuşoǧlu, A, Lenzi, S, Leoni, S, Ljungvall, J, Maron, G, Meczynski, W, Melon, B, Menegazzo, R, Michelagnoli, C, Mijatović, T, Million, B, Molini, P, Montagnoli, G, Montanari, D, Napoli, DR, Nolan, P, Oziol, C, Podolyák, Z, Pollarolo, G, Pullia, A, Quintana, B, Recchia, F, Reiter, P, Roberts, OJ, Rosso, D, Şahin, E, Salsac, MD, Scarlassara, F, Sferrazza, M, Söderström, PA, Stefanini, AM, Stezowski, O, Szilner, S, Theisen, C, Ur, CA, Walshe, J & Simpson, JJ 2014, 'Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os 196', Physical Review C, vol. 90, no. 2, 021301. https://doi.org/10.1103/PhysRevC.90.021301

TY - JOUR

T1 - Shape evolution in the neutron-rich osmium isotopes

T2 - Prompt γ-ray spectroscopy of Os 196

AU - John, P. R.

AU - Modamio, V.

AU - Valiente-Dobón, J. J.

AU - Mengoni, D.

AU - Lunardi, S.

AU - Rodríguez, T. R.

AU - Bazzacco, D.

AU - Gadea, A.

AU - Wheldon, C.

AU - Alexander, T.

AU - De Angelis, G.

AU - Ashwood, N.

AU - Barr, M.

AU - Benzoni, G.

AU - Birkenbach, B.

AU - Bizzeti, P. G.

AU - Bizzeti-Sona, A. M.

AU - Bottoni, S.

AU - Bowry, M.

AU - Bracco, A.

AU - Browne, F.

AU - Bunce, M.

AU - Camera, F.

AU - Cederwall, B.

AU - Corradi, L.

AU - Crespi, F. C L

AU - Désesquelles, P.

AU - Eberth, J.

AU - Farnea, E.

AU - Fioretto, E.

AU - Görgen, A.

AU - Gottardo, A.

AU - Grebosz, J.

AU - Grente, L.

AU - Hess, H.

AU - Jungclaus, A.

AU - Kokalova Wheldon, Tzanka

AU - Korichi, A.

AU - Korten, W.

AU - Kuşoǧlu, A.

AU - Lenzi, S.

AU - Leoni, S.

AU - Ljungvall, J.

AU - Maron, G.

AU - Meczynski, W.

AU - Melon, B.

AU - Menegazzo, R.

AU - Michelagnoli, C.

AU - Mijatović, T.

AU - Million, B.

AU - Molini, P.

AU - Montagnoli, G.

AU - Montanari, D.

AU - Napoli, D. R.

AU - Nolan, P.

AU - Oziol, Ch

AU - Podolyák, Zs

AU - Pollarolo, G.

AU - Pullia, A.

AU - Quintana, B.

AU - Recchia, F.

AU - Reiter, P.

AU - Roberts, O. J.

AU - Rosso, D.

AU - Şahin, E.

AU - Salsac, M. D.

AU - Scarlassara, F.

AU - Sferrazza, M.

AU - Söderström, P. A.

AU - Stefanini, A. M.

AU - Stezowski, O.

AU - Szilner, S.

AU - Theisen, Ch

AU - Ur, C. A.

AU - Walshe, J.

AU - Simpson, John J

PY - 2014/8/13

Y1 - 2014/8/13

N2 - The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states.

AB - The shape transition in the neutron-rich Os isotopes is studied by investigating the neutron-rich 196Os nucleus through in-beam γ-ray spectroscopy using a two-proton transfer reaction from a 198Pt target to a 82Se beam. The beam-like recoils were detected and identified with the large-acceptance magnetic spectrometer PRISMA, and the coincident γ rays were measured with the advanced gamma tracking array (AGATA) demonstrator. The de-excitation of the low-lying levels of the yrast-band of 196Os were identified for the first time. The results are compared with state-of-the-art beyond-mean-field calculations, performed for the even-even 188-198Os isotopes. The new results suggest a smooth transition in the Os isotopes from a more axial rotational behavior towards predominately vibrational nuclei through triaxial configurations. An almost perfect γ-unstable/triaxial rotor yrast band is predicted for 196Os which is in agreement with the experimentally measured excited states.

UR - http://www.scopus.com/inward/record.url?scp=84922833521&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.90.021301

DO - 10.1103/PhysRevC.90.021301

M3 - Article

AN - SCOPUS:84922833521

SN - 0556-2813

VL - 90

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 021301

ER -

Shape evolution in the neutron-rich osmium isotopes: Prompt γ-ray spectroscopy of Os 196

Abstract

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Birmingham Nuclear Physics Consolidated Grant

Advanced Fellowship - Dr Carl Wheldon

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