Characterization of the proposed 4-α cluster state candidate in O 16

K. C.W. Li; R. Neveling; P. Adsley; P. Papka; F. D. Smit; J. W. Brümmer; C. Aa Diget; M. Freer; M. N. Harakeh; Tz Kokalova; F. Nemulodi; L. Pellegri; B. Rebeiro; J. A. Swartz; S. Triambak; J. J. Van Zyl; C. Wheldon

doi:10.1103/PhysRevC.95.031302

Characterization of the proposed 4-α cluster state candidate in O 16

K. C.W. Li, R. Neveling, P. Adsley, P. Papka, F. D. Smit, J. W. Brümmer, C. Aa Diget, M. Freer, M. N. Harakeh, Tz Kokalova, F. Nemulodi, L. Pellegri, B. Rebeiro, J. A. Swartz, S. Triambak, J. J. Van Zyl, C. Wheldon

Physics

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

Abstract

The O16(α,α′) reaction was studied at θlab=0 at an incident energy of Elab=200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton decay and α decay from the natural parity states were observed in a large-acceptance silicon strip detector array at backward angles. The coincident charged-particle measurements were used to characterize the decay channels of the 06+ state in O16 located at Ex=15.097(5) MeV. This state is identified by several theoretical cluster calculations to be a good candidate for the 4-α cluster state. The results of this work suggest the presence of a previously unidentified resonance at Ex≈15 MeV that does not exhibit a 0+ character. This unresolved resonance may have contaminated previous observations of the 06+ state.

Original language	English
Article number	031302
Number of pages	6
Journal	Physical Review C
Volume	95
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.95.031302
Publication status	Published - 3 Mar 2017

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PhysRevC.95.031302
© 2017, American Physical Society. 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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Li, K. C. W., Neveling, R., Adsley, P., Papka, P., Smit, F. D., Brümmer, J. W., Diget, C. A., Freer, M., Harakeh, M. N., Kokalova, T., Nemulodi, F., Pellegri, L., Rebeiro, B., Swartz, J. A., Triambak, S., Van Zyl, J. J., & Wheldon, C. (2017). Characterization of the proposed 4-α cluster state candidate in O 16. Physical Review C, 95(3), Article 031302. https://doi.org/10.1103/PhysRevC.95.031302

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title = "Characterization of the proposed 4-α cluster state candidate in O 16",

abstract = "The O16(α,α′) reaction was studied at θlab=0 at an incident energy of Elab=200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton decay and α decay from the natural parity states were observed in a large-acceptance silicon strip detector array at backward angles. The coincident charged-particle measurements were used to characterize the decay channels of the 06+ state in O16 located at Ex=15.097(5) MeV. This state is identified by several theoretical cluster calculations to be a good candidate for the 4-α cluster state. The results of this work suggest the presence of a previously unidentified resonance at Ex≈15 MeV that does not exhibit a 0+ character. This unresolved resonance may have contaminated previous observations of the 06+ state.",

author = "Li, {K. C.W.} and R. Neveling and P. Adsley and P. Papka and Smit, {F. D.} and Br{\"u}mmer, {J. W.} and Diget, {C. Aa} and M. Freer and Harakeh, {M. N.} and Tz Kokalova and F. Nemulodi and L. Pellegri and B. Rebeiro and Swartz, {J. A.} and S. Triambak and {Van Zyl}, {J. J.} and C. Wheldon",

note = "{\textcopyright} 2017, American Physical Society. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details.",

year = "2017",

month = mar,

day = "3",

doi = "10.1103/PhysRevC.95.031302",

language = "English",

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TY - JOUR

T1 - Characterization of the proposed 4-α cluster state candidate in O 16

AU - Li, K. C.W.

AU - Neveling, R.

AU - Adsley, P.

AU - Papka, P.

AU - Smit, F. D.

AU - Brümmer, J. W.

AU - Diget, C. Aa

AU - Freer, M.

AU - Harakeh, M. N.

AU - Kokalova, Tz

AU - Nemulodi, F.

AU - Pellegri, L.

AU - Rebeiro, B.

AU - Swartz, J. A.

AU - Triambak, S.

AU - Van Zyl, J. J.

AU - Wheldon, C.

PY - 2017/3/3

Y1 - 2017/3/3

N2 - The O16(α,α′) reaction was studied at θlab=0 at an incident energy of Elab=200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton decay and α decay from the natural parity states were observed in a large-acceptance silicon strip detector array at backward angles. The coincident charged-particle measurements were used to characterize the decay channels of the 06+ state in O16 located at Ex=15.097(5) MeV. This state is identified by several theoretical cluster calculations to be a good candidate for the 4-α cluster state. The results of this work suggest the presence of a previously unidentified resonance at Ex≈15 MeV that does not exhibit a 0+ character. This unresolved resonance may have contaminated previous observations of the 06+ state.

AB - The O16(α,α′) reaction was studied at θlab=0 at an incident energy of Elab=200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton decay and α decay from the natural parity states were observed in a large-acceptance silicon strip detector array at backward angles. The coincident charged-particle measurements were used to characterize the decay channels of the 06+ state in O16 located at Ex=15.097(5) MeV. This state is identified by several theoretical cluster calculations to be a good candidate for the 4-α cluster state. The results of this work suggest the presence of a previously unidentified resonance at Ex≈15 MeV that does not exhibit a 0+ character. This unresolved resonance may have contaminated previous observations of the 06+ state.

UR - http://www.scopus.com/inward/record.url?scp=85015799129&partnerID=8YFLogxK

UR - https://arxiv.org/abs/1610.07437

U2 - 10.1103/PhysRevC.95.031302

DO - 10.1103/PhysRevC.95.031302

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SN - 0556-2813

VL - 95

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 031302

ER -

Characterization of the proposed 4-α cluster state candidate in O 16

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