First gamma-ray spectroscopy of Fe-49 and Ni-53: isospin-breaking effects at large proton excess

J. R. Brown; M. A. Bentley; P. Adrich; D. Bazin; J. M. Cook; Christian Aaen Diget; A. Gade; T. Glasmacher; S. M. Lenzi; S. McDaniel; B. Pritychenko; A. Ratkiewicz; K. Siwek; M. J. Taylor; D. Weisshaar

doi:10.1103/PhysRevC.80.011306

First gamma-ray spectroscopy of Fe-49 and Ni-53: isospin-breaking effects at large proton excess

J. R. Brown, M. A. Bentley, P. Adrich, D. Bazin, J. M. Cook, Christian Aaen Diget, A. Gade, T. Glasmacher, S. M. Lenzi, S. McDaniel, B. Pritychenko, A. Ratkiewicz, K. Siwek, M. J. Taylor, D. Weisshaar

Physics

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

Abstract

Isospin-breaking effects have been studied for the first time in T=32 isobaric analog states. Gamma decays have been observed from T-z=-32 nuclei, Fe-49 and Ni-53, presented here in new level schemes, and mirror energy differences have been computed following observation of analog states in V-49 and Mn-53, respectively. Shell-model calculations in the fp shell are in good agreement with the data and reveal the importance of non-Coulomb isospin-breaking effects in T=32 isobaric analog states. A two-step fragmentation process was developed to allow access to highly proton-rich nuclei and to produce each member of a mirror pair via mirrored fragmentation of a Ni-56 secondary beam. This work represents the first study using this technique and demonstrates the power of this approach for future studies of isobaric analog states in very proton-rich systems.

Original language	English
Article number	011306
Pages (from-to)	1-5
Number of pages	5
Journal	Physical Review C
Volume	80
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.80.011306
Publication status	Published - 6 Jul 2009

Keywords

SHELL-MODEL
EXOTIC NUCLEI
SYMMETRY
ENERGIES
STATES
CR-49
V-49

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10.1103/PhysRevC.80.011306

http://prc.aps.org/abstract/PRC/v80/i1/e011306

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Brown, J. R., Bentley, M. A., Adrich, P., Bazin, D., Cook, J. M., Diget, C. A., Gade, A., Glasmacher, T., Lenzi, S. M., McDaniel, S., Pritychenko, B., Ratkiewicz, A., Siwek, K., Taylor, M. J., & Weisshaar, D. (2009). First gamma-ray spectroscopy of Fe-49 and Ni-53: isospin-breaking effects at large proton excess. Physical Review C, 80(1), 1-5. Article 011306. https://doi.org/10.1103/PhysRevC.80.011306

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title = "First gamma-ray spectroscopy of Fe-49 and Ni-53: isospin-breaking effects at large proton excess",

abstract = "Isospin-breaking effects have been studied for the first time in T=32 isobaric analog states. Gamma decays have been observed from T-z=-32 nuclei, Fe-49 and Ni-53, presented here in new level schemes, and mirror energy differences have been computed following observation of analog states in V-49 and Mn-53, respectively. Shell-model calculations in the fp shell are in good agreement with the data and reveal the importance of non-Coulomb isospin-breaking effects in T=32 isobaric analog states. A two-step fragmentation process was developed to allow access to highly proton-rich nuclei and to produce each member of a mirror pair via mirrored fragmentation of a Ni-56 secondary beam. This work represents the first study using this technique and demonstrates the power of this approach for future studies of isobaric analog states in very proton-rich systems.",

keywords = "SHELL-MODEL, EXOTIC NUCLEI, SYMMETRY, ENERGIES, STATES, CR-49, V-49",

author = "Brown, {J. R.} and Bentley, {M. A.} and P. Adrich and D. Bazin and Cook, {J. M.} and Diget, {Christian Aaen} and A. Gade and T. Glasmacher and Lenzi, {S. M.} and S. McDaniel and B. Pritychenko and A. Ratkiewicz and K. Siwek and Taylor, {M. J.} and D. Weisshaar",

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doi = "10.1103/PhysRevC.80.011306",

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Brown, JR , Bentley, MA, Adrich, P, Bazin, D, Cook, JM, Diget, CA, Gade, A, Glasmacher, T, Lenzi, SM, McDaniel, S, Pritychenko, B, Ratkiewicz, A, Siwek, K, Taylor, MJ & Weisshaar, D 2009, 'First gamma-ray spectroscopy of Fe-49 and Ni-53: isospin-breaking effects at large proton excess', Physical Review C, vol. 80, no. 1, 011306, pp. 1-5. https://doi.org/10.1103/PhysRevC.80.011306

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T1 - First gamma-ray spectroscopy of Fe-49 and Ni-53

T2 - isospin-breaking effects at large proton excess

AU - Brown, J. R.

AU - Bentley, M. A.

AU - Adrich, P.

AU - Bazin, D.

AU - Cook, J. M.

AU - Diget, Christian Aaen

AU - Gade, A.

AU - Glasmacher, T.

AU - Lenzi, S. M.

AU - McDaniel, S.

AU - Pritychenko, B.

AU - Ratkiewicz, A.

AU - Siwek, K.

AU - Taylor, M. J.

AU - Weisshaar, D.

PY - 2009/7/6

Y1 - 2009/7/6

N2 - Isospin-breaking effects have been studied for the first time in T=32 isobaric analog states. Gamma decays have been observed from T-z=-32 nuclei, Fe-49 and Ni-53, presented here in new level schemes, and mirror energy differences have been computed following observation of analog states in V-49 and Mn-53, respectively. Shell-model calculations in the fp shell are in good agreement with the data and reveal the importance of non-Coulomb isospin-breaking effects in T=32 isobaric analog states. A two-step fragmentation process was developed to allow access to highly proton-rich nuclei and to produce each member of a mirror pair via mirrored fragmentation of a Ni-56 secondary beam. This work represents the first study using this technique and demonstrates the power of this approach for future studies of isobaric analog states in very proton-rich systems.

AB - Isospin-breaking effects have been studied for the first time in T=32 isobaric analog states. Gamma decays have been observed from T-z=-32 nuclei, Fe-49 and Ni-53, presented here in new level schemes, and mirror energy differences have been computed following observation of analog states in V-49 and Mn-53, respectively. Shell-model calculations in the fp shell are in good agreement with the data and reveal the importance of non-Coulomb isospin-breaking effects in T=32 isobaric analog states. A two-step fragmentation process was developed to allow access to highly proton-rich nuclei and to produce each member of a mirror pair via mirrored fragmentation of a Ni-56 secondary beam. This work represents the first study using this technique and demonstrates the power of this approach for future studies of isobaric analog states in very proton-rich systems.

KW - SHELL-MODEL

KW - EXOTIC NUCLEI

KW - SYMMETRY

KW - ENERGIES

KW - STATES

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KW - V-49

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JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 011306

ER -

First gamma-ray spectroscopy of Fe-49 and Ni-53: isospin-breaking effects at large proton excess

Abstract

Keywords

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