Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

T. W. Hagen; A. Görgen; W Korten; L. Grente; M. -D. Salsac; F. Farget; I. Ragnarsson; T. Braunroth; B. Bruyneel; I. Celikovic; E. Clément; G de France; O. Delaune; A. Dewald; A Dijon; M. Hackstein; B. J Jacquot; J. Litzinger; J. Ljungvall; C. Louchart; C. Michelagnoli; D. R. Napoli; F. Recchia; W. Rother; E. Sahin; S. Siem; B. Sulignano; Ch. Theisen; J. J. Valiente-Dobon

doi:10.1103/PhysRevC.95.034302

Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

T. W. Hagen, A. Görgen, W Korten, L. Grente, M. -D. Salsac, F. Farget, I. Ragnarsson, T. Braunroth, B. Bruyneel, I. Celikovic, E. Clément, G de France, O. Delaune, A. Dewald, A Dijon, M. Hackstein, B. J Jacquot, J. Litzinger, J. Ljungvall, C. LouchartC. Michelagnoli, D. R. Napoli, F. Recchia, W. Rother, E. Sahin, S. Siem, B. Sulignano, Ch. Theisen, J. J. Valiente-Dobon

Mathematical Physics

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Abstract

Lifetimes of excited states in Y99,Y101,Nb101,Nb103, and Nb105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Accélérateur National d'Ions Lourds). The neutron-rich nuclei were produced in fission reactions between a U238 beam and a Be9 target. Prompt γ rays were measured with the EXOGAM array and correlated with fission fragments that were identified in mass and atomic number with the VAMOS++ spectrometer. The measured lifetimes, together with branching ratios, provide B(M1) and B(E2) values for the strongly coupled rotational bands built on the [422]5/2+ ground state in the Y and Nb nuclei with neutron number N≥60. The comparison of the experimental results with triaxial particle-rotor calculations provides information about the evolution of the nuclear shape in this mass region.

Original language	English
Article number	034302
Journal	Physical Review C: covering nuclear physics
Volume	95
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.95.034302
Publication status	Published - 2017 Mar 3

Subject classification (UKÄ)

Subatomic Physics

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10.1103/PhysRevC.95.034302

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Hagen, T. W., Görgen, A., Korten, W., Grente, L., Salsac, M. .-D., Farget, F., Ragnarsson, I., Braunroth, T., Bruyneel, B., Celikovic, I., Clément, E., de France, G., Delaune, O., Dewald, A., Dijon, A., Hackstein, M., Jacquot, B. J., Litzinger, J., Ljungvall, J., ... Valiente-Dobon, J. J. (2017). Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions. Physical Review C: covering nuclear physics, 95(3), Article 034302. https://doi.org/10.1103/PhysRevC.95.034302

@article{a1ab43b3fe7a414980e51a1d1f71eab2,

title = "Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions",

abstract = "Lifetimes of excited states in Y99,Y101,Nb101,Nb103, and Nb105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Acc{\'e}l{\'e}rateur National d'Ions Lourds). The neutron-rich nuclei were produced in fission reactions between a U238 beam and a Be9 target. Prompt γ rays were measured with the EXOGAM array and correlated with fission fragments that were identified in mass and atomic number with the VAMOS++ spectrometer. The measured lifetimes, together with branching ratios, provide B(M1) and B(E2) values for the strongly coupled rotational bands built on the [422]5/2+ ground state in the Y and Nb nuclei with neutron number N≥60. The comparison of the experimental results with triaxial particle-rotor calculations provides information about the evolution of the nuclear shape in this mass region.",

author = "Hagen, {T. W.} and A. G{\"o}rgen and W Korten and L. Grente and Salsac, {M. -D.} and F. Farget and I. Ragnarsson and T. Braunroth and B. Bruyneel and I. Celikovic and E. Cl{\'e}ment and {de France}, G and O. Delaune and A. Dewald and A Dijon and M. Hackstein and Jacquot, {B. J} and J. Litzinger and J. Ljungvall and C. Louchart and C. Michelagnoli and Napoli, {D. R.} and F. Recchia and W. Rother and E. Sahin and S. Siem and B. Sulignano and Ch. Theisen and Valiente-Dobon, {J. J.}",

year = "2017",

month = mar,

day = "3",

doi = "10.1103/PhysRevC.95.034302",

language = "English",

volume = "95",

journal = "Physical Review C: covering nuclear physics",

issn = "2469-9985",

publisher = "American Physical Society",

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Hagen, TW, Görgen, A, Korten, W, Grente, L, Salsac, M-D, Farget, F, Ragnarsson, I, Braunroth, T, Bruyneel, B, Celikovic, I, Clément, E, de France, G, Delaune, O, Dewald, A, Dijon, A, Hackstein, M, Jacquot, BJ, Litzinger, J, Ljungvall, J, Louchart, C, Michelagnoli, C, Napoli, DR, Recchia, F, Rother, W, Sahin, E, Siem, S, Sulignano, B, Theisen, C & Valiente-Dobon, JJ 2017, 'Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions', Physical Review C: covering nuclear physics, vol. 95, no. 3, 034302. https://doi.org/10.1103/PhysRevC.95.034302

TY - JOUR

T1 - Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

AU - Hagen, T. W.

AU - Görgen, A.

AU - Korten, W

AU - Grente, L.

AU - Salsac, M. -D.

AU - Farget, F.

AU - Ragnarsson, I.

AU - Braunroth, T.

AU - Bruyneel, B.

AU - Celikovic, I.

AU - Clément, E.

AU - de France, G

AU - Delaune, O.

AU - Dewald, A.

AU - Dijon, A

AU - Hackstein, M.

AU - Jacquot, B. J

AU - Litzinger, J.

AU - Ljungvall, J.

AU - Louchart, C.

AU - Michelagnoli, C.

AU - Napoli, D. R.

AU - Recchia, F.

AU - Rother, W.

AU - Sahin, E.

AU - Siem, S.

AU - Sulignano, B.

AU - Theisen, Ch.

AU - Valiente-Dobon, J. J.

PY - 2017/3/3

Y1 - 2017/3/3

N2 - Lifetimes of excited states in Y99,Y101,Nb101,Nb103, and Nb105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Accélérateur National d'Ions Lourds). The neutron-rich nuclei were produced in fission reactions between a U238 beam and a Be9 target. Prompt γ rays were measured with the EXOGAM array and correlated with fission fragments that were identified in mass and atomic number with the VAMOS++ spectrometer. The measured lifetimes, together with branching ratios, provide B(M1) and B(E2) values for the strongly coupled rotational bands built on the [422]5/2+ ground state in the Y and Nb nuclei with neutron number N≥60. The comparison of the experimental results with triaxial particle-rotor calculations provides information about the evolution of the nuclear shape in this mass region.

AB - Lifetimes of excited states in Y99,Y101,Nb101,Nb103, and Nb105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Accélérateur National d'Ions Lourds). The neutron-rich nuclei were produced in fission reactions between a U238 beam and a Be9 target. Prompt γ rays were measured with the EXOGAM array and correlated with fission fragments that were identified in mass and atomic number with the VAMOS++ spectrometer. The measured lifetimes, together with branching ratios, provide B(M1) and B(E2) values for the strongly coupled rotational bands built on the [422]5/2+ ground state in the Y and Nb nuclei with neutron number N≥60. The comparison of the experimental results with triaxial particle-rotor calculations provides information about the evolution of the nuclear shape in this mass region.

UR - http://www.scopus.com/inward/record.url?scp=85015789127&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.95.034302

DO - 10.1103/PhysRevC.95.034302

M3 - Article

AN - SCOPUS:85015789127

SN - 2469-9985

VL - 95

JO - Physical Review C: covering nuclear physics

JF - Physical Review C: covering nuclear physics

IS - 3

M1 - 034302

ER -

Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions

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