In-beam γ -ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N=126 shell gap

P.R. John; J.J. Valiente-Dobón; D. Mengoni; V. Modamio; S. Lunardi; D. Bazzacco; A. Gadea; C. Wheldon; T.R. Rodríguez; 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; L. Corradi; F.C.L. Crespi; B. Melon; E. Farnea; E. Fioretto; A. Gottardo; L. Grente; H. Hess; Tz. Kokalova; W. Korten; A. Kuşoǧlu; S. Lenzi; S. Leoni; J. Ljungvall; R. Menegazzo; C. Michelagnoli; T. Mijatović; G. Montagnoli; D. Montanari; D.R. Napoli; Zs. Podolyák; G. Pollarolo; F. Recchia; P. Reiter; O.J. Roberts; E. Şahin; M.-D. Salsac; F. Scarlassara; M. Sferrazza; P.-A. Söderström; A.M. Stefanini; S. Szilner; C.A. Ur; A. Vogt; J. Walshe

doi:10.1103/PhysRevC.95.064321

In-beam γ -ray spectroscopy of the neutron-rich platinum isotope ²⁰⁰Pt toward the N=126 shell gap

P.R. John^*, J.J. Valiente-Dobón, D. Mengoni, V. Modamio, S. Lunardi, D. Bazzacco, A. Gadea, C. Wheldon, T.R. Rodríguez, 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, L. Corradi, F.C.L. Crespi, B. Melon, E. Farnea, E. Fioretto, A. Gottardo, L. Grente, H. Hess, Tz. Kokalova, W. Korten, A. Kuşoǧlu, S. Lenzi, S. Leoni, J. Ljungvall, R. Menegazzo, C. Michelagnoli, T. Mijatović, G. Montagnoli, D. Montanari, D.R. Napoli, Zs. Podolyák, G. Pollarolo, F. Recchia, P. Reiter, O.J. Roberts, E. Şahin, M.-D. Salsac, F. Scarlassara, M. Sferrazza, P.-A. Söderström, A.M. Stefanini, S. Szilner, C.A. Ur, A. Vogt, J. Walshe

^*Corresponding author for this work

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Abstract

The neutron-rich nucleus ²⁰⁰Pt is investigated via in-beam γ-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N=126 shell closure. The two-neutron transfer reaction ¹⁹⁸Pt(⁸²Se, ⁸⁰Se)²⁰⁰Pt is used to populate excited states of ²⁰⁰Pt. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects γ rays coincident with the ⁸⁰Se recoils, the binary partner of ²⁰⁰Pt. The binary partner method is applied to extract the γ-ray transitions and build the level scheme of ²⁰⁰Pt. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (6₁⁺) state. An additional γ ray was found and it presumably deexcites the (8₁⁺) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even ^190-204Pt isotopes, revealing that ²⁰⁰Pt marks the transition from the γ-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.

Original language	English
Article number	064321
Journal	Physical Review C
Volume	95
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.95.064321
Publication status	Published - 22 Jun 2017
Externally published	Yes

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10.1103/PhysRevC.95.064321

https://epubs.surrey.ac.uk/814153/

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John, P. R., Valiente-Dobón, J. J., Mengoni, D., Modamio, V., Lunardi, S., Bazzacco, D., Gadea, A., Wheldon, C., Rodríguez, T. R., Alexander, T., De Angelis, G., Ashwood, N., Barr, M., Benzoni, G., Birkenbach, B., Bizzeti, P. G., Bizzeti-Sona, A. M., Bottoni, S., Bowry, M., ... Walshe, J. (2017). In-beam γ -ray spectroscopy of the neutron-rich platinum isotope ²⁰⁰Pt toward the N=126 shell gap. Physical Review C, 95(6), Article 064321. https://doi.org/10.1103/PhysRevC.95.064321

@article{982bcb85a01c432ca726b7725f028b6a,

title = "In-beam γ -ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N=126 shell gap",

abstract = "The neutron-rich nucleus 200Pt is investigated via in-beam γ-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N=126 shell closure. The two-neutron transfer reaction 198Pt(82Se, 80Se)200Pt is used to populate excited states of 200Pt. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects γ rays coincident with the 80Se recoils, the binary partner of 200Pt. The binary partner method is applied to extract the γ-ray transitions and build the level scheme of 200Pt. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (61+) state. An additional γ ray was found and it presumably deexcites the (81+) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even 190-204Pt isotopes, revealing that 200Pt marks the transition from the γ-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.",

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

year = "2017",

month = jun,

day = "22",

doi = "10.1103/PhysRevC.95.064321",

language = "English",

volume = "95",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

John, PR, Valiente-Dobón, JJ, Mengoni, D, Modamio, V, Lunardi, S, Bazzacco, D, Gadea, A, Wheldon, C, Rodríguez, TR, 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, Corradi, L, Crespi, FCL, Melon, B, Farnea, E, Fioretto, E, Gottardo, A, Grente, L, Hess, H, Kokalova, T, Korten, W, Kuşoǧlu, A, Lenzi, S, Leoni, S, Ljungvall, J, Menegazzo, R, Michelagnoli, C, Mijatović, T, Montagnoli, G, Montanari, D, Napoli, DR, Podolyák, Z, Pollarolo, G, Recchia, F, Reiter, P, Roberts, OJ, Şahin, E, Salsac, M-D, Scarlassara, F, Sferrazza, M, Söderström, P-A, Stefanini, AM, Szilner, S, Ur, CA, Vogt, A & Walshe, J 2017, 'In-beam γ -ray spectroscopy of the neutron-rich platinum isotope ²⁰⁰Pt toward the N=126 shell gap', Physical Review C, vol. 95, no. 6, 064321. https://doi.org/10.1103/PhysRevC.95.064321

TY - JOUR

T1 - In-beam γ -ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N=126 shell gap

AU - John, P.R.

AU - Valiente-Dobón, J.J.

AU - Mengoni, D.

AU - Modamio, V.

AU - Lunardi, S.

AU - Bazzacco, D.

AU - Gadea, A.

AU - Wheldon, C.

AU - Rodríguez, T.R.

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 - Corradi, L.

AU - Crespi, F.C.L.

AU - Melon, B.

AU - Farnea, E.

AU - Fioretto, E.

AU - Gottardo, A.

AU - Grente, L.

AU - Hess, H.

AU - Kokalova, Tz.

AU - Korten, W.

AU - Kuşoǧlu, A.

AU - Lenzi, S.

AU - Leoni, S.

AU - Ljungvall, J.

AU - Menegazzo, R.

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 - Reiter, P.

AU - Roberts, O.J.

AU - Şahin, E.

AU - Salsac, M.-D.

AU - Scarlassara, F.

AU - Sferrazza, M.

AU - Söderström, P.-A.

AU - Stefanini, A.M.

AU - Szilner, S.

AU - Ur, C.A.

AU - Vogt, A.

AU - Walshe, J.

PY - 2017/6/22

Y1 - 2017/6/22

N2 - The neutron-rich nucleus 200Pt is investigated via in-beam γ-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N=126 shell closure. The two-neutron transfer reaction 198Pt(82Se, 80Se)200Pt is used to populate excited states of 200Pt. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects γ rays coincident with the 80Se recoils, the binary partner of 200Pt. The binary partner method is applied to extract the γ-ray transitions and build the level scheme of 200Pt. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (61+) state. An additional γ ray was found and it presumably deexcites the (81+) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even 190-204Pt isotopes, revealing that 200Pt marks the transition from the γ-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.

AB - The neutron-rich nucleus 200Pt is investigated via in-beam γ-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N=126 shell closure. The two-neutron transfer reaction 198Pt(82Se, 80Se)200Pt is used to populate excited states of 200Pt. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects γ rays coincident with the 80Se recoils, the binary partner of 200Pt. The binary partner method is applied to extract the γ-ray transitions and build the level scheme of 200Pt. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (61+) state. An additional γ ray was found and it presumably deexcites the (81+) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even 190-204Pt isotopes, revealing that 200Pt marks the transition from the γ-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N=126 shell closure.

U2 - 10.1103/PhysRevC.95.064321

DO - 10.1103/PhysRevC.95.064321

M3 - Article

SN - 2469-9985

VL - 95

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 064321

ER -

In-beam γ -ray spectroscopy of the neutron-rich platinum isotope 200Pt toward the N=126 shell gap

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In-beam γ -ray spectroscopy of the neutron-rich platinum isotope ²⁰⁰Pt toward the N=126 shell gap