Study of shape transition in the neutron-rich Os isotopes

P. R. John; V. Modamio; J. J. Valiente-Dobón; D. Mengoni; A. Gottardo; D. Bazzacco; S. Lunardi; T. Alexander; G. De Angelis; N. Ashwood; M. Barr; P. G. Bizzeti; A. M. Bizzeti-Sona; S. Bottoni; M. Bowry; A. Bracco; F. Browne; M. Bunce; A. Gadea; F. Camera; L. Corradi; F. C L Crespi; E. Farnea; E. Fioretto; Tz Kokalova; W. Korten; A. Kuşoǧlu; S. Lenzi; S. Leoni; C. Michelagnoli; T. Mijatović; G. Montagnoli; D. Montanari; D. R. Napoli; Zs Podolyák; G. Pollarolo; F. Recchia; O. J. Roberts; E. Şahin; M. D. Salsac; F. Scarlassara; A. M. Stefanini; S. Szilner; C. A. Ur; J. Walshe; C. Wheldon

doi:10.1051/epjconf/20146602057

Study of shape transition in the neutron-rich Os isotopes

P. R. John, V. Modamio, J. J. Valiente-Dobón, D. Mengoni, A. Gottardo, D. Bazzacco, S. Lunardi, T. Alexander, G. De Angelis, N. Ashwood, M. Barr, P. G. Bizzeti, A. M. Bizzeti-Sona, S. Bottoni, M. Bowry, A. Bracco, F. Browne, M. Bunce, A. Gadea, F. CameraL. Corradi, F. C L Crespi, E. Farnea, E. Fioretto, Tz Kokalova, W. Korten, A. Kuşoǧlu, S. Lenzi, S. Leoni, C. Michelagnoli, T. Mijatović, G. Montagnoli, D. Montanari, D. R. Napoli, Zs Podolyák, G. Pollarolo, F. Recchia, O. J. Roberts, E. Şahin, M. D. Salsac, F. Scarlassara, A. M. Stefanini, S. Szilner, C. A. Ur, J. Walshe, C. Wheldon

Physics and Astronomy

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

Abstract

The neutron-rich isotopes of tungsten, osmium and platinum have different shapes in their ground states and present also shape transitions phenomena. Spectroscopic information for these nuclei is scarce and often limited to the gamma rays from the decay of isomeric states. For the neutron-rich even-even osmium isotopes ¹⁹⁴Os and ¹⁹⁸Os, a shape transition between a slightly prolate deformed to an oblate deformed ground state was deduced from the observed level schemes. For the even-even nucleus lying in between, ¹⁹⁶Os, no gamma ray transition is known. In order to elucidate the shape transition and to test the nuclear models describing it, this region was investigated through gamma-ray spectroscopy using the AGATA demonstrator and the large acceptance heavy-ion spectrometer PRISMA at LNL, Italy. A two-nucleon transfer from a ¹⁹⁸Pt target to a stable ⁸²Se beam was utilized to populate medium-high spin states of ¹⁹⁶Os. The analysis method and preliminary results, including the first life-time measurement of isomeric states with AGATA, are presented.

Original language	English
Article number	02057
Journal	EPJ Web of Conferences
Volume	66
DOIs	https://doi.org/10.1051/epjconf/20146602057
Publication status	Published - 14 Apr 2014

ASJC Scopus subject areas

General Physics and Astronomy

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10.1051/epjconf/20146602057

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

Cite this

John, P. R., Modamio, V., Valiente-Dobón, J. J., Mengoni, D., Gottardo, A., Bazzacco, D., Lunardi, S., Alexander, T., De Angelis, G., Ashwood, N., Barr, M., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., Bracco, A., Browne, F., Bunce, M., Gadea, A., ... Wheldon, C. (2014). Study of shape transition in the neutron-rich Os isotopes. EPJ Web of Conferences, 66, Article 02057. https://doi.org/10.1051/epjconf/20146602057

@article{3dfbe69914f84e45ada18ecc4a6d5785,

title = "Study of shape transition in the neutron-rich Os isotopes",

abstract = "The neutron-rich isotopes of tungsten, osmium and platinum have different shapes in their ground states and present also shape transitions phenomena. Spectroscopic information for these nuclei is scarce and often limited to the gamma rays from the decay of isomeric states. For the neutron-rich even-even osmium isotopes 194Os and 198Os, a shape transition between a slightly prolate deformed to an oblate deformed ground state was deduced from the observed level schemes. For the even-even nucleus lying in between, 196Os, no gamma ray transition is known. In order to elucidate the shape transition and to test the nuclear models describing it, this region was investigated through gamma-ray spectroscopy using the AGATA demonstrator and the large acceptance heavy-ion spectrometer PRISMA at LNL, Italy. A two-nucleon transfer from a 198Pt target to a stable 82Se beam was utilized to populate medium-high spin states of 196Os. The analysis method and preliminary results, including the first life-time measurement of isomeric states with AGATA, are presented.",

author = "John, {P. R.} and V. Modamio and Valiente-Dob{\'o}n, {J. J.} and D. Mengoni and A. Gottardo and D. Bazzacco and S. Lunardi and T. Alexander and {De Angelis}, G. and N. Ashwood and M. Barr 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 A. Gadea and F. Camera and L. Corradi and Crespi, {F. C L} and E. Farnea and E. Fioretto and Tz Kokalova and W. Korten and A. Ku{\c s}oǧlu and S. Lenzi and S. Leoni and C. Michelagnoli and T. Mijatovi{\'c} and G. Montagnoli and D. Montanari and Napoli, {D. R.} and Zs Podoly{\'a}k and G. Pollarolo and F. Recchia and Roberts, {O. J.} and E. {\c S}ahin and Salsac, {M. D.} and F. Scarlassara and Stefanini, {A. M.} and S. Szilner and Ur, {C. A.} and J. Walshe and C. Wheldon",

year = "2014",

month = apr,

day = "14",

doi = "10.1051/epjconf/20146602057",

language = "English",

volume = "66",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

publisher = "EDP Sciences",

}

John, PR, Modamio, V, Valiente-Dobón, JJ, Mengoni, D, Gottardo, A, Bazzacco, D, Lunardi, S, Alexander, T, De Angelis, G, Ashwood, N, Barr, M, Bizzeti, PG, Bizzeti-Sona, AM, Bottoni, S, Bowry, M, Bracco, A, Browne, F, Bunce, M, Gadea, A, Camera, F, Corradi, L, Crespi, FCL, Farnea, E, Fioretto, E, Kokalova, T, Korten, W, Kuşoǧlu, A, Lenzi, S, Leoni, S, Michelagnoli, C, Mijatović, T, Montagnoli, G, Montanari, D, Napoli, DR, Podolyák, Z, Pollarolo, G, Recchia, F, Roberts, OJ, Şahin, E, Salsac, MD, Scarlassara, F, Stefanini, AM, Szilner, S, Ur, CA, Walshe, J & Wheldon, C 2014, 'Study of shape transition in the neutron-rich Os isotopes', EPJ Web of Conferences, vol. 66, 02057. https://doi.org/10.1051/epjconf/20146602057

TY - JOUR

T1 - Study of shape transition in the neutron-rich Os isotopes

AU - John, P. R.

AU - Modamio, V.

AU - Valiente-Dobón, J. J.

AU - Mengoni, D.

AU - Gottardo, A.

AU - Bazzacco, D.

AU - Lunardi, S.

AU - Alexander, T.

AU - De Angelis, G.

AU - Ashwood, N.

AU - Barr, M.

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 - Gadea, A.

AU - Camera, F.

AU - Corradi, L.

AU - Crespi, F. C L

AU - Farnea, E.

AU - Fioretto, E.

AU - Kokalova, Tz

AU - Korten, W.

AU - Kuşoǧlu, A.

AU - Lenzi, S.

AU - Leoni, S.

AU - Michelagnoli, C.

AU - Mijatović, T.

AU - Montagnoli, G.

AU - Montanari, D.

AU - Napoli, D. R.

AU - Podolyák, Zs

AU - Pollarolo, G.

AU - Recchia, F.

AU - Roberts, O. J.

AU - Şahin, E.

AU - Salsac, M. D.

AU - Scarlassara, F.

AU - Stefanini, A. M.

AU - Szilner, S.

AU - Ur, C. A.

AU - Walshe, J.

AU - Wheldon, C.

PY - 2014/4/14

Y1 - 2014/4/14

N2 - The neutron-rich isotopes of tungsten, osmium and platinum have different shapes in their ground states and present also shape transitions phenomena. Spectroscopic information for these nuclei is scarce and often limited to the gamma rays from the decay of isomeric states. For the neutron-rich even-even osmium isotopes 194Os and 198Os, a shape transition between a slightly prolate deformed to an oblate deformed ground state was deduced from the observed level schemes. For the even-even nucleus lying in between, 196Os, no gamma ray transition is known. In order to elucidate the shape transition and to test the nuclear models describing it, this region was investigated through gamma-ray spectroscopy using the AGATA demonstrator and the large acceptance heavy-ion spectrometer PRISMA at LNL, Italy. A two-nucleon transfer from a 198Pt target to a stable 82Se beam was utilized to populate medium-high spin states of 196Os. The analysis method and preliminary results, including the first life-time measurement of isomeric states with AGATA, are presented.

AB - The neutron-rich isotopes of tungsten, osmium and platinum have different shapes in their ground states and present also shape transitions phenomena. Spectroscopic information for these nuclei is scarce and often limited to the gamma rays from the decay of isomeric states. For the neutron-rich even-even osmium isotopes 194Os and 198Os, a shape transition between a slightly prolate deformed to an oblate deformed ground state was deduced from the observed level schemes. For the even-even nucleus lying in between, 196Os, no gamma ray transition is known. In order to elucidate the shape transition and to test the nuclear models describing it, this region was investigated through gamma-ray spectroscopy using the AGATA demonstrator and the large acceptance heavy-ion spectrometer PRISMA at LNL, Italy. A two-nucleon transfer from a 198Pt target to a stable 82Se beam was utilized to populate medium-high spin states of 196Os. The analysis method and preliminary results, including the first life-time measurement of isomeric states with AGATA, are presented.

UR - http://www.scopus.com/inward/record.url?scp=84898735153&partnerID=8YFLogxK

U2 - 10.1051/epjconf/20146602057

DO - 10.1051/epjconf/20146602057

M3 - Article

AN - SCOPUS:84898735153

SN - 2101-6275

VL - 66

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 02057

ER -

Study of shape transition in the neutron-rich Os isotopes

Abstract

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Birmingham Nuclear Physics Consolidated Grant

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