High-spin states in 212Po above the α-decaying (18+) isomer

L. Zago; A. Gottardo; J. J. Valiente-Dobón; G. Benzoni; A. Gadea; M. Górska; S. Lunardi; Zs Podolyák; P. H. Regan; D. Rudolph; A. Algora; G. de Angelis; D. Bazzacco; J. Benlliure; P. Boutachkov; A. Bracco; A. M. Bruce; F. Camera; E. Casarejos; M. L. Cortés; F. C.L. Crespi; A. Corsi; C. Domingo-Pardo; M. Doncel; T. Engert; H. Geissel; J. Gerl; A. Goasduff; N. Goel; J. Grebosz; E. Gregor; T. Habermann; S. Klupp; I. Kojouharov; N. Kurz; S. M. Lenzi; S. Leoni; S. Mandal; R. Menegazzo; D. Mengoni; B. Million; A. I. Morales; D. R. Napoli; F. Naqvi; C. Nociforo; M. Pfützner; S. Pietri; A. Prochazka; F. Recchia; E. Sahin; H. Schaffner; B. Sitar; D. Siwal; P. Strmen; I. Szarka; C. A. Ur; P. M. Walker; H. Weick; O. Wieland; H. J. Wollersheim

doi:10.1016/j.physletb.2022.137457

High-spin states in ²¹²Po above the α-decaying (18⁺) isomer

L. Zago, A. Gottardo, J. J. Valiente-Dobón, G. Benzoni, A. Gadea, M. Górska, S. Lunardi, Zs Podolyák, P. H. Regan, D. Rudolph, A. Algora, G. de Angelis, D. Bazzacco, J. Benlliure, P. Boutachkov, A. Bracco, A. M. Bruce, F. Camera, E. Casarejos, M. L. CortésF. C.L. Crespi, A. Corsi, C. Domingo-Pardo, M. Doncel, T. Engert, H. Geissel, J. Gerl, A. Goasduff, N. Goel, J. Grebosz, E. Gregor, T. Habermann, S. Klupp, I. Kojouharov, N. Kurz, S. M. Lenzi, S. Leoni, S. Mandal, R. Menegazzo, D. Mengoni, B. Million, A. I. Morales, D. R. Napoli, F. Naqvi, C. Nociforo, M. Pfützner, S. Pietri, A. Prochazka, F. Recchia, E. Sahin, H. Schaffner, B. Sitar, D. Siwal, P. Strmen, I. Szarka, C. A. Ur, P. M. Walker, H. Weick, O. Wieland, H. J. Wollersheim

School of Arch, Tech and Eng

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

Abstract

The nucleus ²¹²Po has been produced through the fragmentation of a ²³⁸U primary beam at 1 GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer γ-decay spectroscopy with the RISING setup. Two delayed previously unknown γ rays have been observed. One has been attributed to the E3 decay of a 21⁻ isomeric state feeding the α-emitting 45-s (18⁺) high-spin isomer. The other γ-ray line has been assigned to the decay of a higher-lying 23⁺ metastable state. These are the first observations of high-spin states above the ²¹²Po (18⁺) isomer, by virtue of the selectivity obtained via ion-by-ion identification of ²³⁸U fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high-j proton and neutron orbitals, to which the region around Z∼100 is sensitive.

Original language	English
Article number	137457
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	834
DOIs	https://doi.org/10.1016/j.physletb.2022.137457
Publication status	Published - 15 Sept 2022

Bibliographical note

Funding Information:
The GSI accelerator staff are acknowledged. CloudVeneto [49] is acknowledged for the use of computing and storage facilities. The authors acknowledge the support of the Italian Istituto Nazionale di Fisica Nucleare . This work was partially supported by the Ministry of Science, and Generalitat Valenciana , Spain, under the Grants SEV-2014-0398 , FPA2017-84756-C4 , PID2019-104714GB-C21 , PROMETEO/2019/005 and by the EU FEDER funds. The support of the UK STFC , of the Swedish Research Council under Contract No. 2008-4240 and No. 2016-3969 and of the DFG ( EXC 153 ) is also acknowledged. The experimental activity has been partially supported by the EU under the FP6-Integrated Infrastructure Initiative EURONS, Contract No. RII3-CT-2004-506065 and FP7-Integrated Infrastructure Initiative ENSAR, Grant No. 262010 .

Funding Information:
The GSI accelerator staff are acknowledged. CloudVeneto [49] is acknowledged for the use of computing and storage facilities. The authors acknowledge the support of the Italian Istituto Nazionale di Fisica Nucleare. This work was partially supported by the Ministry of Science, and Generalitat Valenciana, Spain, under the Grants SEV-2014-0398, FPA2017-84756-C4, PID2019-104714GB-C21, PROMETEO/2019/005 and by the EU FEDER funds. The support of the UK STFC, of the Swedish Research Council under Contract No. 2008-4240 and No. 2016-3969 and of the DFG (EXC 153) is also acknowledged. The experimental activity has been partially supported by the EU under the FP6-Integrated Infrastructure Initiative EURONS, Contract No. RII3-CT-2004-506065 and FP7-Integrated Infrastructure Initiative ENSAR, Grant No. 262010.

Publisher Copyright:
© 2022 The Authors

Keywords

High-spin spectroscopy
Isomer spectroscopy
γ spectroscopy

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Cite this

Zago, L., Gottardo, A., Valiente-Dobón, J. J., Benzoni, G., Gadea, A., Górska, M., Lunardi, S., Podolyák, Z., Regan, P. H., Rudolph, D., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A. M., Camera, F., Casarejos, E., ... Wollersheim, H. J. (2022). High-spin states in ²¹²Po above the α-decaying (18⁺) isomer. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 834, Article 137457. https://doi.org/10.1016/j.physletb.2022.137457

@article{46bf2223a8834d658e6b0dd63f8cb03a,

title = "High-spin states in 212Po above the α-decaying (18+) isomer",

abstract = "The nucleus 212Po has been produced through the fragmentation of a 238U primary beam at 1 GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer γ-decay spectroscopy with the RISING setup. Two delayed previously unknown γ rays have been observed. One has been attributed to the E3 decay of a 21− isomeric state feeding the α-emitting 45-s (18+) high-spin isomer. The other γ-ray line has been assigned to the decay of a higher-lying 23+ metastable state. These are the first observations of high-spin states above the 212Po (18+) isomer, by virtue of the selectivity obtained via ion-by-ion identification of 238U fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high-j proton and neutron orbitals, to which the region around Z∼100 is sensitive.",

keywords = "High-spin spectroscopy, Isomer spectroscopy, γ spectroscopy",

author = "L. Zago and A. Gottardo and Valiente-Dob{\'o}n, {J. J.} and G. Benzoni and A. Gadea and M. G{\'o}rska and S. Lunardi and Zs Podoly{\'a}k and Regan, {P. H.} and D. Rudolph and A. Algora and {de Angelis}, G. and D. Bazzacco and J. Benlliure and P. Boutachkov and A. Bracco and Bruce, {A. M.} and F. Camera and E. Casarejos and Cort{\'e}s, {M. L.} and Crespi, {F. C.L.} and A. Corsi and C. Domingo-Pardo and M. Doncel and T. Engert and H. Geissel and J. Gerl and A. Goasduff and N. Goel and J. Grebosz and E. Gregor and T. Habermann and S. Klupp and I. Kojouharov and N. Kurz and Lenzi, {S. M.} and S. Leoni and S. Mandal and R. Menegazzo and D. Mengoni and B. Million and Morales, {A. I.} and Napoli, {D. R.} and F. Naqvi and C. Nociforo and M. Pf{\"u}tzner and S. Pietri and A. Prochazka and F. Recchia and E. Sahin and H. Schaffner and B. Sitar and D. Siwal and P. Strmen and I. Szarka and Ur, {C. A.} and Walker, {P. M.} and H. Weick and O. Wieland and Wollersheim, {H. J.}",

note = "Funding Information: The GSI accelerator staff are acknowledged. CloudVeneto [49] is acknowledged for the use of computing and storage facilities. The authors acknowledge the support of the Italian Istituto Nazionale di Fisica Nucleare . This work was partially supported by the Ministry of Science, and Generalitat Valenciana , Spain, under the Grants SEV-2014-0398 , FPA2017-84756-C4 , PID2019-104714GB-C21 , PROMETEO/2019/005 and by the EU FEDER funds. The support of the UK STFC , of the Swedish Research Council under Contract No. 2008-4240 and No. 2016-3969 and of the DFG ( EXC 153 ) is also acknowledged. The experimental activity has been partially supported by the EU under the FP6-Integrated Infrastructure Initiative EURONS, Contract No. RII3-CT-2004-506065 and FP7-Integrated Infrastructure Initiative ENSAR, Grant No. 262010 . Funding Information: The GSI accelerator staff are acknowledged. CloudVeneto [49] is acknowledged for the use of computing and storage facilities. The authors acknowledge the support of the Italian Istituto Nazionale di Fisica Nucleare. This work was partially supported by the Ministry of Science, and Generalitat Valenciana, Spain, under the Grants SEV-2014-0398, FPA2017-84756-C4, PID2019-104714GB-C21, PROMETEO/2019/005 and by the EU FEDER funds. The support of the UK STFC, of the Swedish Research Council under Contract No. 2008-4240 and No. 2016-3969 and of the DFG (EXC 153) is also acknowledged. The experimental activity has been partially supported by the EU under the FP6-Integrated Infrastructure Initiative EURONS, Contract No. RII3-CT-2004-506065 and FP7-Integrated Infrastructure Initiative ENSAR, Grant No. 262010. Publisher Copyright: {\textcopyright} 2022 The Authors",

year = "2022",

month = sep,

day = "15",

doi = "10.1016/j.physletb.2022.137457",

language = "English",

volume = "834",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

}

Zago, L, Gottardo, A, Valiente-Dobón, JJ, Benzoni, G, Gadea, A, Górska, M, Lunardi, S, Podolyák, Z, Regan, PH, Rudolph, D, Algora, A, de Angelis, G, Bazzacco, D, Benlliure, J, Boutachkov, P, Bracco, A, Bruce, AM, Camera, F, Casarejos, E, Cortés, ML, Crespi, FCL, Corsi, A, Domingo-Pardo, C, Doncel, M, Engert, T, Geissel, H, Gerl, J, Goasduff, A, Goel, N, Grebosz, J, Gregor, E, Habermann, T, Klupp, S, Kojouharov, I, Kurz, N, Lenzi, SM, Leoni, S, Mandal, S, Menegazzo, R, Mengoni, D, Million, B, Morales, AI, Napoli, DR, Naqvi, F, Nociforo, C, Pfützner, M, Pietri, S, Prochazka, A, Recchia, F, Sahin, E, Schaffner, H, Sitar, B, Siwal, D, Strmen, P, Szarka, I, Ur, CA, Walker, PM, Weick, H, Wieland, O & Wollersheim, HJ 2022, 'High-spin states in ²¹²Po above the α-decaying (18⁺) isomer', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 834, 137457. https://doi.org/10.1016/j.physletb.2022.137457

TY - JOUR

T1 - High-spin states in 212Po above the α-decaying (18+) isomer

AU - Zago, L.

AU - Gottardo, A.

AU - Valiente-Dobón, J. J.

AU - Benzoni, G.

AU - Gadea, A.

AU - Górska, M.

AU - Lunardi, S.

AU - Podolyák, Zs

AU - Regan, P. H.

AU - Rudolph, D.

AU - Algora, A.

AU - de Angelis, G.

AU - Bazzacco, D.

AU - Benlliure, J.

AU - Boutachkov, P.

AU - Bracco, A.

AU - Bruce, A. M.

AU - Camera, F.

AU - Casarejos, E.

AU - Cortés, M. L.

AU - Crespi, F. C.L.

AU - Corsi, A.

AU - Domingo-Pardo, C.

AU - Doncel, M.

AU - Engert, T.

AU - Geissel, H.

AU - Gerl, J.

AU - Goasduff, A.

AU - Goel, N.

AU - Grebosz, J.

AU - Gregor, E.

AU - Habermann, T.

AU - Klupp, S.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Lenzi, S. M.

AU - Leoni, S.

AU - Mandal, S.

AU - Menegazzo, R.

AU - Mengoni, D.

AU - Million, B.

AU - Morales, A. I.

AU - Napoli, D. R.

AU - Naqvi, F.

AU - Nociforo, C.

AU - Pfützner, M.

AU - Pietri, S.

AU - Prochazka, A.

AU - Recchia, F.

AU - Sahin, E.

AU - Schaffner, H.

AU - Sitar, B.

AU - Siwal, D.

AU - Strmen, P.

AU - Szarka, I.

AU - Ur, C. A.

AU - Walker, P. M.

AU - Weick, H.

AU - Wieland, O.

AU - Wollersheim, H. J.

N1 - Funding Information: The GSI accelerator staff are acknowledged. CloudVeneto [49] is acknowledged for the use of computing and storage facilities. The authors acknowledge the support of the Italian Istituto Nazionale di Fisica Nucleare . This work was partially supported by the Ministry of Science, and Generalitat Valenciana , Spain, under the Grants SEV-2014-0398 , FPA2017-84756-C4 , PID2019-104714GB-C21 , PROMETEO/2019/005 and by the EU FEDER funds. The support of the UK STFC , of the Swedish Research Council under Contract No. 2008-4240 and No. 2016-3969 and of the DFG ( EXC 153 ) is also acknowledged. The experimental activity has been partially supported by the EU under the FP6-Integrated Infrastructure Initiative EURONS, Contract No. RII3-CT-2004-506065 and FP7-Integrated Infrastructure Initiative ENSAR, Grant No. 262010 . Funding Information: The GSI accelerator staff are acknowledged. CloudVeneto [49] is acknowledged for the use of computing and storage facilities. The authors acknowledge the support of the Italian Istituto Nazionale di Fisica Nucleare. This work was partially supported by the Ministry of Science, and Generalitat Valenciana, Spain, under the Grants SEV-2014-0398, FPA2017-84756-C4, PID2019-104714GB-C21, PROMETEO/2019/005 and by the EU FEDER funds. The support of the UK STFC, of the Swedish Research Council under Contract No. 2008-4240 and No. 2016-3969 and of the DFG (EXC 153) is also acknowledged. The experimental activity has been partially supported by the EU under the FP6-Integrated Infrastructure Initiative EURONS, Contract No. RII3-CT-2004-506065 and FP7-Integrated Infrastructure Initiative ENSAR, Grant No. 262010. Publisher Copyright: © 2022 The Authors

PY - 2022/9/15

Y1 - 2022/9/15

N2 - The nucleus 212Po has been produced through the fragmentation of a 238U primary beam at 1 GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer γ-decay spectroscopy with the RISING setup. Two delayed previously unknown γ rays have been observed. One has been attributed to the E3 decay of a 21− isomeric state feeding the α-emitting 45-s (18+) high-spin isomer. The other γ-ray line has been assigned to the decay of a higher-lying 23+ metastable state. These are the first observations of high-spin states above the 212Po (18+) isomer, by virtue of the selectivity obtained via ion-by-ion identification of 238U fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high-j proton and neutron orbitals, to which the region around Z∼100 is sensitive.

AB - The nucleus 212Po has been produced through the fragmentation of a 238U primary beam at 1 GeV/nucleon at GSI, separated with the FRagment Separator, FRS, and studied via isomer γ-decay spectroscopy with the RISING setup. Two delayed previously unknown γ rays have been observed. One has been attributed to the E3 decay of a 21− isomeric state feeding the α-emitting 45-s (18+) high-spin isomer. The other γ-ray line has been assigned to the decay of a higher-lying 23+ metastable state. These are the first observations of high-spin states above the 212Po (18+) isomer, by virtue of the selectivity obtained via ion-by-ion identification of 238U fragmentation products. Comparison with shell-model calculations points to shortfalls in the nuclear interactions involving high-j proton and neutron orbitals, to which the region around Z∼100 is sensitive.

KW - High-spin spectroscopy

KW - Isomer spectroscopy

KW - γ spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85138786400&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2022.137457

DO - 10.1016/j.physletb.2022.137457

M3 - Article

AN - SCOPUS:85138786400

SN - 0370-2693

VL - 834

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 137457

ER -