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
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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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), Article 082502. https://doi.org/10.1103/PhysRevLett.117.082502

@article{44b7bd6456c644889e7b5b666f13f8db,

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",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = aug,

day = "15",

doi = "10.1103/PhysRevLett.117.082502",

language = "English",

volume = "117",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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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

TY - JOUR

T1 - Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States

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.

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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U2 - 10.1103/PhysRevLett.117.082502

DO - 10.1103/PhysRevLett.117.082502

M3 - Article

SN - 0031-9007

VL - 117

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

M1 - 082502

ER -

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

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