Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States

S. A. Milne; M. A. Bentley; E. C. Simpson; T. Baugher; D. Bazin; J. S. Berryman; A. M. Bruce; P. J. Davies; C. Aa Diget; A. Gade; T. W. Henry; H. Iwasaki; A. Lemasson; S. M. Lenzi; S. McDaniel; D. R. Napoli; A. J. Nichols; A. Ratkiewicz; L. Scruton; S. R. Stroberg; J. A. Tostevin; D. Weisshaar; K. Wimmer; R. Winkler

doi:10.1103/PhysRevLett.117.082502

Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States

S. A. Milne, M. A. Bentley, E. C. Simpson, T. Baugher, D. Bazin, J. S. Berryman, A. M. Bruce, P. J. Davies, C. Aa Diget, A. Gade, T. W. Henry, H. Iwasaki, A. Lemasson, S. M. Lenzi, S. McDaniel, D. R. Napoli, A. J. Nichols, A. Ratkiewicz, L. Scruton, S. R. StrobergJ. A. Tostevin, D. Weisshaar, K. Wimmer, R. Winkler

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Abstract

One-neutron knockout reactions have been performed on a beam of radioactive Co53 in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cross section, and hence represents a technique that is applicable to the planned new generation of fragmentation-based radioactive beam facilities. Additionally, the relative cross sections among the excited states can be predicted to a high level of accuracy when reliable shell-model input is available. The work has resulted in a new level scheme, up to the 11+ band-termination state, of the proton-rich nucleus Co52 (Z=27, N=25). This has in turn enabled a study of mirror energy differences in the A=52 odd-odd mirror nuclei, interpreted in terms of isospin-nonconserving (INC) forces in nuclei. The analysis demonstrates the importance of using a full set of J-dependent INC terms to explain the experimental observations.

Original language	English
Article number	082502
Number of pages	5
Journal	Physical Review Letters
Volume	117
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.117.082502
Publication status	Published - 15 Aug 2016

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© 2016 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

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Milne, S. A., Bentley, M. A., Simpson, E. C., Baugher, T., Bazin, D., Berryman, J. S., Bruce, A. M., Davies, P. J., Diget, C. A., Gade, A., Henry, T. W., Iwasaki, H., Lemasson, A., Lenzi, S. M., McDaniel, S., Napoli, D. R., Nichols, A. J., Ratkiewicz, A., Scruton, L., ... Winkler, R. (2016). Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States. Physical Review Letters, 117(8), [082502]. https://doi.org/10.1103/PhysRevLett.117.082502

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title = "Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States",

abstract = "One-neutron knockout reactions have been performed on a beam of radioactive Co53 in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cross section, and hence represents a technique that is applicable to the planned new generation of fragmentation-based radioactive beam facilities. Additionally, the relative cross sections among the excited states can be predicted to a high level of accuracy when reliable shell-model input is available. The work has resulted in a new level scheme, up to the 11+ band-termination state, of the proton-rich nucleus Co52 (Z=27, N=25). This has in turn enabled a study of mirror energy differences in the A=52 odd-odd mirror nuclei, interpreted in terms of isospin-nonconserving (INC) forces in nuclei. The analysis demonstrates the importance of using a full set of J-dependent INC terms to explain the experimental observations.",

author = "Milne, {S. A.} and Bentley, {M. A.} and Simpson, {E. C.} and T. Baugher and D. Bazin and Berryman, {J. S.} and Bruce, {A. M.} and Davies, {P. J.} and Diget, {C. Aa} and A. Gade and Henry, {T. W.} and H. Iwasaki and A. Lemasson and Lenzi, {S. M.} and S. McDaniel and Napoli, {D. R.} and Nichols, {A. J.} and A. Ratkiewicz and L. Scruton and Stroberg, {S. R.} and Tostevin, {J. A.} and D. Weisshaar and K. Wimmer and R. Winkler",

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Milne, SA , Bentley, MA , Simpson, EC, Baugher, T, Bazin, D, Berryman, JS, Bruce, AM, Davies, PJ , Diget, CA, Gade, A, Henry, TW, Iwasaki, H, Lemasson, A, Lenzi, SM, McDaniel, S, Napoli, DR, Nichols, AJ, Ratkiewicz, A, Scruton, L, Stroberg, SR, Tostevin, JA, Weisshaar, D, Wimmer, K & Winkler, R 2016, 'Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States', Physical Review Letters, vol. 117, no. 8, 082502. https://doi.org/10.1103/PhysRevLett.117.082502

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AU - Milne, S. A.

AU - Bentley, M. A.

AU - Simpson, E. C.

AU - Baugher, T.

AU - Bazin, D.

AU - Berryman, J. S.

AU - Bruce, A. M.

AU - Davies, P. J.

AU - Diget, C. Aa

AU - Gade, A.

AU - Henry, T. W.

AU - Iwasaki, H.

AU - Lemasson, A.

AU - Lenzi, S. M.

AU - McDaniel, S.

AU - Napoli, D. R.

AU - Nichols, A. J.

AU - Ratkiewicz, A.

AU - Scruton, L.

AU - Stroberg, S. R.

AU - Tostevin, J. A.

AU - Weisshaar, D.

AU - Wimmer, K.

AU - Winkler, R.

N1 - © 2016 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2016/8/15

Y1 - 2016/8/15

N2 - One-neutron knockout reactions have been performed on a beam of radioactive Co53 in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cross section, and hence represents a technique that is applicable to the planned new generation of fragmentation-based radioactive beam facilities. Additionally, the relative cross sections among the excited states can be predicted to a high level of accuracy when reliable shell-model input is available. The work has resulted in a new level scheme, up to the 11+ band-termination state, of the proton-rich nucleus Co52 (Z=27, N=25). This has in turn enabled a study of mirror energy differences in the A=52 odd-odd mirror nuclei, interpreted in terms of isospin-nonconserving (INC) forces in nuclei. The analysis demonstrates the importance of using a full set of J-dependent INC terms to explain the experimental observations.

AB - One-neutron knockout reactions have been performed on a beam of radioactive Co53 in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cross section, and hence represents a technique that is applicable to the planned new generation of fragmentation-based radioactive beam facilities. Additionally, the relative cross sections among the excited states can be predicted to a high level of accuracy when reliable shell-model input is available. The work has resulted in a new level scheme, up to the 11+ band-termination state, of the proton-rich nucleus Co52 (Z=27, N=25). This has in turn enabled a study of mirror energy differences in the A=52 odd-odd mirror nuclei, interpreted in terms of isospin-nonconserving (INC) forces in nuclei. The analysis demonstrates the importance of using a full set of J-dependent INC terms to explain the experimental observations.

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DO - 10.1103/PhysRevLett.117.082502

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JO - Physical Review Letters

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ER -

Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States

Abstract

Bibliographical note

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Other files and links

Mike Bentley

Mirror Nuclei studied at NSCL (Michigan) using mirrored direct knockout

Isospin-symmetry breaking in nuclei

Nuclear Physics Consolidated Grant

Cite this

Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States

Abstract

Bibliographical note

Access to Document

Other files and links

Profiles

Mike Bentley

Projects

Mirror Nuclei studied at NSCL (Michigan) using mirrored direct knockout

Isospin-symmetry breaking in nuclei

Nuclear Physics Consolidated Grant

Cite this