Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb

The spectroscopic quadrupole moment of the T(1/2) = 9.4(5) ns isomer in (193)Pb at an excitation energy E(ex) = (2585 + x) keV is measured by the time-differential perturbed angular distribution method as vertical bar Q(s)vertical bar = 2.6(3) e b. Spin and parity I(pi) = 27/2(-) are assigned to it...

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Detalles Bibliográficos
Autores principales: Balabanski, D L, Ionescu-Bujor, M, Iordachescu, A, Bazzacco, D, Brandolini, F, Bucurescu, D, Chmel, S, Danchev, M, De Poli, M, Georgiev, G, Haas, H, Hubel, H, Marginean, N, Menegazzo, R, Neyens, G, Pavan, P, Rossi Alvarez, C, Ur, C A, Vyvey, K, Frauendorf, S
Lenguaje:eng
Publicado: 2011
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevC.83.014304
http://cds.cern.ch/record/1399879
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author Balabanski, D L
Ionescu-Bujor, M
Iordachescu, A
Bazzacco, D
Brandolini, F
Bucurescu, D
Chmel, S
Danchev, M
De Poli, M
Georgiev, G
Haas, H
Hubel, H
Marginean, N
Menegazzo, R
Neyens, G
Pavan, P
Rossi Alvarez, C
Ur, C A
Vyvey, K
Frauendorf, S
author_facet Balabanski, D L
Ionescu-Bujor, M
Iordachescu, A
Bazzacco, D
Brandolini, F
Bucurescu, D
Chmel, S
Danchev, M
De Poli, M
Georgiev, G
Haas, H
Hubel, H
Marginean, N
Menegazzo, R
Neyens, G
Pavan, P
Rossi Alvarez, C
Ur, C A
Vyvey, K
Frauendorf, S
author_sort Balabanski, D L
collection CERN
description The spectroscopic quadrupole moment of the T(1/2) = 9.4(5) ns isomer in (193)Pb at an excitation energy E(ex) = (2585 + x) keV is measured by the time-differential perturbed angular distribution method as vertical bar Q(s)vertical bar = 2.6(3) e b. Spin and parity I(pi) = 27/2(-) are assigned to it based on angular distribution measurements. This state is the band head of a magnetic-rotational band, described by the coupling of a neutron hole in the 1i(13/2) subshell with the (3s(1/2)(-2)1h(9/2)1i(13/2))(11-) proton excitation. The pairing-plus-quadrupole tilted-axis cranking calculations reproduce the measured quadrupole moment with a moderate oblate deformation epsilon(2) = -0.11, similar to that of the 11(-)proton intruder states, which occur in the even-even Pb nuclei in the region. This is the first direct measurement of a quadrupole moment and thus of the deformation of a magnetic-rotational band head.
id cern-1399879
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13998792019-09-30T06:29:59Zdoi:10.1103/PhysRevC.83.014304http://cds.cern.ch/record/1399879engBalabanski, D LIonescu-Bujor, MIordachescu, ABazzacco, DBrandolini, FBucurescu, DChmel, SDanchev, MDe Poli, MGeorgiev, GHaas, HHubel, HMarginean, NMenegazzo, RNeyens, GPavan, PRossi Alvarez, CUr, C AVyvey, KFrauendorf, SSpin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)PbNuclear Physics - ExperimentThe spectroscopic quadrupole moment of the T(1/2) = 9.4(5) ns isomer in (193)Pb at an excitation energy E(ex) = (2585 + x) keV is measured by the time-differential perturbed angular distribution method as vertical bar Q(s)vertical bar = 2.6(3) e b. Spin and parity I(pi) = 27/2(-) are assigned to it based on angular distribution measurements. This state is the band head of a magnetic-rotational band, described by the coupling of a neutron hole in the 1i(13/2) subshell with the (3s(1/2)(-2)1h(9/2)1i(13/2))(11-) proton excitation. The pairing-plus-quadrupole tilted-axis cranking calculations reproduce the measured quadrupole moment with a moderate oblate deformation epsilon(2) = -0.11, similar to that of the 11(-)proton intruder states, which occur in the even-even Pb nuclei in the region. This is the first direct measurement of a quadrupole moment and thus of the deformation of a magnetic-rotational band head.oai:cds.cern.ch:13998792011
spellingShingle Nuclear Physics - Experiment
Balabanski, D L
Ionescu-Bujor, M
Iordachescu, A
Bazzacco, D
Brandolini, F
Bucurescu, D
Chmel, S
Danchev, M
De Poli, M
Georgiev, G
Haas, H
Hubel, H
Marginean, N
Menegazzo, R
Neyens, G
Pavan, P
Rossi Alvarez, C
Ur, C A
Vyvey, K
Frauendorf, S
Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb
title Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb
title_full Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb
title_fullStr Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb
title_full_unstemmed Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb
title_short Spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)Pb
title_sort spin, quadrupole moment, and deformation of the magnetic-rotational band head in (193)pb
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.1103/PhysRevC.83.014304
http://cds.cern.ch/record/1399879
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