The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb

G. Bocchi; S. Leoni; B. Fornal; G. Colò; P. F. Bortignon; S. Bottoni; A. Bracco; C. Michelagnoli; D. Bazzacco; A. Blanc; G. de France; M. Jentschel; U. Köster; P. Mutti; J. M. Régis; G. Simpson; T. Soldner; C. A. Ur; W. Urban; L. M. Fraile; R. Lozeva; B. Belvito; G. Benzoni; A. Bruce; R. Carroll; N. Cieplicka-Oryǹczak; F. C.L. Crespi; F. Didierjean; J. Jolie; W. Korten; T. Kröll; S. Lalkovski; H. Mach; N. Mărginean; B. Melon; D. Mengoni; B. Million; A. Nannini; D. Napoli; B. Olaizola; V. Paziy; Zs Podolyák; P. H. Regan; N. Saed-Samii; B. Szpak; V. Vedia

doi:10.1016/j.physletb.2016.06.065

The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb

G. Bocchi, S. Leoni, B. Fornal, G. Colò, P. F. Bortignon, S. Bottoni, A. Bracco, C. Michelagnoli, D. Bazzacco, A. Blanc, G. de France, M. Jentschel, U. Köster, P. Mutti, J. M. Régis, G. Simpson, T. Soldner, C. A. Ur, W. Urban, L. M. FraileR. Lozeva, B. Belvito, G. Benzoni, A. Bruce, R. Carroll, N. Cieplicka-Oryǹczak, F. C.L. Crespi, F. Didierjean, J. Jolie, W. Korten, T. Kröll, S. Lalkovski, H. Mach, N. Mărginean, B. Melon, D. Mengoni, B. Million, A. Nannini, D. Napoli, B. Olaizola, V. Paziy, Zs Podolyák, P. H. Regan, N. Saed-Samii, B. Szpak, V. Vedia

University of Brighton

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

Abstract

The γ-ray decay of excited states of the one-valence-proton nucleus ¹³³Sb has been studied using cold-neutron induced fission of ²³⁵U and ²⁴¹Pu targets, during the EXILL campaign at the ILL reactor in Grenoble. By using a highly efficient HPGe array, coincidences between γ-rays prompt with the fission event and those delayed up to several tens of microseconds were investigated, allowing to observe, for the first time, high-spin excited states above the 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques with LaBr₃(Ce) scintillators, revealed a difference of almost two orders of magnitude in B(M1) strength for transitions between positive-parity medium-spin yrast states. The data are interpreted by a newly developed microscopic model which takes into account couplings between core excitations (both collective and non-collective) of the doubly magic nucleus ¹³²Sn and the valence proton, using the Skyrme effective interaction in a consistent way. The results point to a fast change in the nature of particle-core excitations with increasing spin.

Original language	English
Pages (from-to)	273-278
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	760
DOIs	https://doi.org/10.1016/j.physletb.2016.06.065
Publication status	Published - 10 Sept 2016

Bibliographical note

© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by
SCOAP3.

Keywords

Gamma spectroscopy
Large Ge array
Neutron induced fission
Nuclear state lifetime
Particle-core couplings

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Cite this

Bocchi, G., Leoni, S., Fornal, B., Colò, G., Bortignon, P. F., Bottoni, S., Bracco, A., Michelagnoli, C., Bazzacco, D., Blanc, A., de France, G., Jentschel, M., Köster, U., Mutti, P., Régis, J. M., Simpson, G., Soldner, T., Ur, C. A., Urban, W., ... Vedia, V. (2016). The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 760, 273-278. https://doi.org/10.1016/j.physletb.2016.06.065

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title = "The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb",

abstract = "The γ-ray decay of excited states of the one-valence-proton nucleus 133Sb has been studied using cold-neutron induced fission of 235U and 241Pu targets, during the EXILL campaign at the ILL reactor in Grenoble. By using a highly efficient HPGe array, coincidences between γ-rays prompt with the fission event and those delayed up to several tens of microseconds were investigated, allowing to observe, for the first time, high-spin excited states above the 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques with LaBr3(Ce) scintillators, revealed a difference of almost two orders of magnitude in B(M1) strength for transitions between positive-parity medium-spin yrast states. The data are interpreted by a newly developed microscopic model which takes into account couplings between core excitations (both collective and non-collective) of the doubly magic nucleus 132Sn and the valence proton, using the Skyrme effective interaction in a consistent way. The results point to a fast change in the nature of particle-core excitations with increasing spin.",

keywords = "Gamma spectroscopy, Large Ge array, Neutron induced fission, Nuclear state lifetime, Particle-core couplings",

author = "G. Bocchi and S. Leoni and B. Fornal and G. Col{\`o} and Bortignon, {P. F.} and S. Bottoni and A. Bracco and C. Michelagnoli and D. Bazzacco and A. Blanc and {de France}, G. and M. Jentschel and U. K{\"o}ster and P. Mutti and R{\'e}gis, {J. M.} and G. Simpson and T. Soldner and Ur, {C. A.} and W. Urban and Fraile, {L. M.} and R. Lozeva and B. Belvito and G. Benzoni and A. Bruce and R. Carroll and N. Cieplicka-Oryǹczak and Crespi, {F. C.L.} and F. Didierjean and J. Jolie and W. Korten and T. Kr{\"o}ll and S. Lalkovski and H. Mach and N. M{\u a}rginean and B. Melon and D. Mengoni and B. Million and A. Nannini and D. Napoli and B. Olaizola and V. Paziy and Zs Podoly{\'a}k and Regan, {P. H.} and N. Saed-Samii and B. Szpak and V. Vedia",

note = "{\textcopyright} 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.",

year = "2016",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2016.06.065",

language = "English",

volume = "760",

pages = "273--278",

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

issn = "0370-2693",

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Bocchi, G, Leoni, S, Fornal, B, Colò, G, Bortignon, PF, Bottoni, S, Bracco, A, Michelagnoli, C, Bazzacco, D, Blanc, A, de France, G, Jentschel, M, Köster, U, Mutti, P, Régis, JM, Simpson, G, Soldner, T, Ur, CA, Urban, W, Fraile, LM, Lozeva, R, Belvito, B, Benzoni, G, Bruce, A, Carroll, R, Cieplicka-Oryǹczak, N, Crespi, FCL, Didierjean, F, Jolie, J, Korten, W, Kröll, T, Lalkovski, S, Mach, H, Mărginean, N, Melon, B, Mengoni, D, Million, B, Nannini, A, Napoli, D, Olaizola, B, Paziy, V, Podolyák, Z, Regan, PH, Saed-Samii, N, Szpak, B & Vedia, V 2016, 'The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 760, pp. 273-278. https://doi.org/10.1016/j.physletb.2016.06.065

TY - JOUR

T1 - The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb

AU - Bocchi, G.

AU - Leoni, S.

AU - Fornal, B.

AU - Colò, G.

AU - Bortignon, P. F.

AU - Bottoni, S.

AU - Bracco, A.

AU - Michelagnoli, C.

AU - Bazzacco, D.

AU - Blanc, A.

AU - de France, G.

AU - Jentschel, M.

AU - Köster, U.

AU - Mutti, P.

AU - Régis, J. M.

AU - Simpson, G.

AU - Soldner, T.

AU - Ur, C. A.

AU - Urban, W.

AU - Fraile, L. M.

AU - Lozeva, R.

AU - Belvito, B.

AU - Benzoni, G.

AU - Bruce, A.

AU - Carroll, R.

AU - Cieplicka-Oryǹczak, N.

AU - Crespi, F. C.L.

AU - Didierjean, F.

AU - Jolie, J.

AU - Korten, W.

AU - Kröll, T.

AU - Lalkovski, S.

AU - Mach, H.

AU - Mărginean, N.

AU - Melon, B.

AU - Mengoni, D.

AU - Million, B.

AU - Nannini, A.

AU - Napoli, D.

AU - Olaizola, B.

AU - Paziy, V.

AU - Podolyák, Zs

AU - Regan, P. H.

AU - Saed-Samii, N.

AU - Szpak, B.

AU - Vedia, V.

PY - 2016/9/10

Y1 - 2016/9/10

N2 - The γ-ray decay of excited states of the one-valence-proton nucleus 133Sb has been studied using cold-neutron induced fission of 235U and 241Pu targets, during the EXILL campaign at the ILL reactor in Grenoble. By using a highly efficient HPGe array, coincidences between γ-rays prompt with the fission event and those delayed up to several tens of microseconds were investigated, allowing to observe, for the first time, high-spin excited states above the 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques with LaBr3(Ce) scintillators, revealed a difference of almost two orders of magnitude in B(M1) strength for transitions between positive-parity medium-spin yrast states. The data are interpreted by a newly developed microscopic model which takes into account couplings between core excitations (both collective and non-collective) of the doubly magic nucleus 132Sn and the valence proton, using the Skyrme effective interaction in a consistent way. The results point to a fast change in the nature of particle-core excitations with increasing spin.

AB - The γ-ray decay of excited states of the one-valence-proton nucleus 133Sb has been studied using cold-neutron induced fission of 235U and 241Pu targets, during the EXILL campaign at the ILL reactor in Grenoble. By using a highly efficient HPGe array, coincidences between γ-rays prompt with the fission event and those delayed up to several tens of microseconds were investigated, allowing to observe, for the first time, high-spin excited states above the 16.6 μs isomer. Lifetimes analysis, performed by fast-timing techniques with LaBr3(Ce) scintillators, revealed a difference of almost two orders of magnitude in B(M1) strength for transitions between positive-parity medium-spin yrast states. The data are interpreted by a newly developed microscopic model which takes into account couplings between core excitations (both collective and non-collective) of the doubly magic nucleus 132Sn and the valence proton, using the Skyrme effective interaction in a consistent way. The results point to a fast change in the nature of particle-core excitations with increasing spin.

KW - Gamma spectroscopy

KW - Large Ge array

KW - Neutron induced fission

KW - Nuclear state lifetime

KW - Particle-core couplings

UR - http://www.scopus.com/inward/record.url?scp=84978127504&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2016.06.065

DO - 10.1016/j.physletb.2016.06.065

M3 - Article

AN - SCOPUS:84978127504

SN - 0370-2693

VL - 760

SP - 273

EP - 278

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

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

ER -

The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb

Abstract

Bibliographical note

Keywords

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Alison Bruce

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The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus 133Sb

Abstract

Bibliographical note

Keywords

Access to Document

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Profiles

Alison Bruce

Cite this

The mutable nature of particle-core excitations with spin in the one-valence-proton nucleus ¹³³Sb