Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape

A. M. Hurst; P. A. Butler; D. G. Jenkins; P. Delahaye; F. Wenander; F. Ames; C. J. Barton; T. Behrens; A. Burger; Joakim Cederkäll; E. Clement; T. Czosnyka; T. Davinson; G. de Angelis; J. Eberth; Andreas Ekström; S. Franchoo; G. Georgiev; A. Gorgen; R. -D. Herzberg; M. Huyse; O. Ivanov; J. Iwanicki; G. D. Jones; P. Kent; U. Koester; T. Kroell; R. Kruecken; A. C. Larsen; M. Nespolo; M. Pantea; E. S. Paul; M. Petri; H. Scheit; T. Sieber; S. Siem; J. F. Smith; A. Steer; I. Stefanescu; N. U. H. Syed; J. Van de Walle; P. Van Duppen; R. Wadsworth; N. Warr; D. Weisshaar; M. Zielinska

doi:10.1103/PhysRevLett.98.072501

Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape

A. M. Hurst, P. A. Butler, D. G. Jenkins, P. Delahaye, F. Wenander, F. Ames, C. J. Barton, T. Behrens, A. Burger, Joakim Cederkäll, E. Clement, T. Czosnyka, T. Davinson, G. de Angelis, J. Eberth, Andreas Ekström, S. Franchoo, G. Georgiev, A. Gorgen, R. -D. HerzbergM. Huyse, O. Ivanov, J. Iwanicki, G. D. Jones, P. Kent, U. Koester, T. Kroell, R. Kruecken, A. C. Larsen, M. Nespolo, M. Pantea, E. S. Paul, M. Petri, H. Scheit, T. Sieber, S. Siem, J. F. Smith, A. Steer, I. Stefanescu, N. U. H. Syed, J. Van de Walle, P. Van Duppen, R. Wadsworth, N. Warr, D. Weisshaar, M. Zielinska

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Abstract

Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes.

Original language	English
Journal	Physical Review Letters
Volume	98
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.98.072501
Publication status	Published - 2007

Subject classification (UKÄ)

Subatomic Physics

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10.1103/PhysRevLett.98.072501

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Hurst, A. M., Butler, P. A., Jenkins, D. G., Delahaye, P., Wenander, F., Ames, F., Barton, C. J., Behrens, T., Burger, A., Cederkäll, J., Clement, E., Czosnyka, T., Davinson, T., de Angelis, G., Eberth, J., Ekström, A., Franchoo, S., Georgiev, G., Gorgen, A., ... Zielinska, M. (2007). Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape. Physical Review Letters, 98(7). https://doi.org/10.1103/PhysRevLett.98.072501

@article{d2cacd517273478fb41c82ca20d952a2,

title = "Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape",

abstract = "Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes.",

author = "Hurst, {A. M.} and Butler, {P. A.} and Jenkins, {D. G.} and P. Delahaye and F. Wenander and F. Ames and Barton, {C. J.} and T. Behrens and A. Burger and Joakim Cederk{\"a}ll and E. Clement and T. Czosnyka and T. Davinson and {de Angelis}, G. and J. Eberth and Andreas Ekstr{\"o}m and S. Franchoo and G. Georgiev and A. Gorgen and Herzberg, {R. -D.} and M. Huyse and O. Ivanov and J. Iwanicki and Jones, {G. D.} and P. Kent and U. Koester and T. Kroell and R. Kruecken and Larsen, {A. C.} and M. Nespolo and M. Pantea and Paul, {E. S.} and M. Petri and H. Scheit and T. Sieber and S. Siem and Smith, {J. F.} and A. Steer and I. Stefanescu and Syed, {N. U. H.} and {de Walle}, {J. Van} and {Van Duppen}, P. and R. Wadsworth and N. Warr and D. Weisshaar and M. Zielinska",

year = "2007",

doi = "10.1103/PhysRevLett.98.072501",

language = "English",

volume = "98",

journal = "Physical Review Letters",

issn = "1079-7114",

publisher = "American Physical Society",

number = "7",

}

Hurst, AM, Butler, PA, Jenkins, DG, Delahaye, P, Wenander, F, Ames, F, Barton, CJ, Behrens, T, Burger, A, Cederkäll, J, Clement, E, Czosnyka, T, Davinson, T, de Angelis, G, Eberth, J, Ekström, A, Franchoo, S, Georgiev, G, Gorgen, A, Herzberg, R-D, Huyse, M, Ivanov, O, Iwanicki, J, Jones, GD, Kent, P, Koester, U, Kroell, T, Kruecken, R, Larsen, AC, Nespolo, M, Pantea, M, Paul, ES, Petri, M, Scheit, H, Sieber, T, Siem, S, Smith, JF, Steer, A, Stefanescu, I, Syed, NUH, de Walle, JV, Van Duppen, P, Wadsworth, R, Warr, N, Weisshaar, D & Zielinska, M 2007, 'Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape', Physical Review Letters, vol. 98, no. 7. https://doi.org/10.1103/PhysRevLett.98.072501

TY - JOUR

T1 - Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape

AU - Hurst, A. M.

AU - Butler, P. A.

AU - Jenkins, D. G.

AU - Delahaye, P.

AU - Wenander, F.

AU - Ames, F.

AU - Barton, C. J.

AU - Behrens, T.

AU - Burger, A.

AU - Cederkäll, Joakim

AU - Clement, E.

AU - Czosnyka, T.

AU - Davinson, T.

AU - de Angelis, G.

AU - Eberth, J.

AU - Ekström, Andreas

AU - Franchoo, S.

AU - Georgiev, G.

AU - Gorgen, A.

AU - Herzberg, R. -D.

AU - Huyse, M.

AU - Ivanov, O.

AU - Iwanicki, J.

AU - Jones, G. D.

AU - Kent, P.

AU - Koester, U.

AU - Kroell, T.

AU - Kruecken, R.

AU - Larsen, A. C.

AU - Nespolo, M.

AU - Pantea, M.

AU - Paul, E. S.

AU - Petri, M.

AU - Scheit, H.

AU - Sieber, T.

AU - Siem, S.

AU - Smith, J. F.

AU - Steer, A.

AU - Stefanescu, I.

AU - Syed, N. U. H.

AU - de Walle, J. Van

AU - Van Duppen, P.

AU - Wadsworth, R.

AU - Warr, N.

AU - Weisshaar, D.

AU - Zielinska, M.

PY - 2007

Y1 - 2007

N2 - Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes.

AB - Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes.

U2 - 10.1103/PhysRevLett.98.072501

DO - 10.1103/PhysRevLett.98.072501

M3 - Article

SN - 1079-7114

VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

ER -

Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape

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