High-spin states beyond the proton drip-line: Quasiparticle alignments in 113Cs

P. T. Wady; J. F. Smith; B. Hadinia; D. M. Cullen; S. J. Freeman; I. G. Darby; S. Eeckhaudt; T. Grahn; P. T. Greenlees; P. M. Jones; R. Julin; S. Juutinen; H. Kettunen; M. Leino; A. P. Leppänen; B. M. McGuirk; P. Nieminen; M. Nyman; R. D. Page; J. Pakarinen; E. S. Paul; P. Rahkila; S. V. Rigby; C. Scholey; J. Uusitalo; R. Wadsworth

doi:10.1016/j.physletb.2014.11.045

High-spin states beyond the proton drip-line: Quasiparticle alignments in ¹¹³Cs

P. T. Wady, J. F. Smith^*, B. Hadinia, D. M. Cullen, S. J. Freeman, I. G. Darby, S. Eeckhaudt, T. Grahn, P. T. Greenlees, P. M. Jones, R. Julin, S. Juutinen, H. Kettunen, M. Leino, A. P. Leppänen, B. M. McGuirk, P. Nieminen, M. Nyman, R. D. Page, J. PakarinenE. S. Paul, P. Rahkila, S. V. Rigby, C. Scholey, J. Uusitalo, R. Wadsworth

^*Corresponding author for this work

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

Abstract

Excited states have been studied in the deformed proton emitter ¹¹³Cs. Gamma-ray transitions have been unambiguously assigned to ¹¹³Cs by correlation with its characteristic proton decay, using the method of recoil-decay tagging. Two previously identified rotational bands have been observed and extended to tentative spins of 45/2 and 51/2h, with excitation energies over 8 MeV above the lowest state. These are the highest angular momenta and excitation energies observed to date in any nucleus beyond the proton drip-line. Transitions in the bands have been rearranged compared to previous work. A study of aligned angular momenta, in comparison to the predictions of Woods-Saxon cranking calculations, is consistent with the most intense band being based on the πg_7/2[422]3/2⁺ configuration, which would contradict the earlier πh_11/2 assignment, and with the second band being based on the πd_5/2[420]1/2⁺ configuration. The data suggest that the band based upon the πh_11/2 configuration is not observed.

Original language	English
Pages (from-to)	243-249
Number of pages	7
Journal	Physics Letters B : Nuclear, Elementary Particle and High-Energy Physics
Volume	740
Early online date	26 Nov 2014
DOIs	https://doi.org/10.1016/j.physletb.2014.11.045
Publication status	Published - Jan 2015

Keywords

Gamma-ray spectroscopy
High-spin states
Proton decay
Quasiparticle alignments
Recoil-decay tagging

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10.1016/j.physletb.2014.11.045

Cite this

Wady, P. T., Smith, J. F., Hadinia, B., Cullen, D. M., Freeman, S. J., Darby, I. G., Eeckhaudt, S., Grahn, T., Greenlees, P. T., Jones, P. M., Julin, R., Juutinen, S., Kettunen, H., Leino, M., Leppänen, A. P., McGuirk, B. M., Nieminen, P., Nyman, M., Page, R. D., ... Wadsworth, R. (2015). High-spin states beyond the proton drip-line: Quasiparticle alignments in ¹¹³Cs. Physics Letters B : Nuclear, Elementary Particle and High-Energy Physics, 740, 243-249. https://doi.org/10.1016/j.physletb.2014.11.045

@article{369e0b83de1649019e839500604c0d72,

title = "High-spin states beyond the proton drip-line: Quasiparticle alignments in 113Cs",

abstract = "Excited states have been studied in the deformed proton emitter 113Cs. Gamma-ray transitions have been unambiguously assigned to 113Cs by correlation with its characteristic proton decay, using the method of recoil-decay tagging. Two previously identified rotational bands have been observed and extended to tentative spins of 45/2 and 51/2h, with excitation energies over 8 MeV above the lowest state. These are the highest angular momenta and excitation energies observed to date in any nucleus beyond the proton drip-line. Transitions in the bands have been rearranged compared to previous work. A study of aligned angular momenta, in comparison to the predictions of Woods-Saxon cranking calculations, is consistent with the most intense band being based on the πg7/2[422]3/2+ configuration, which would contradict the earlier πh11/2 assignment, and with the second band being based on the πd5/2[420]1/2+ configuration. The data suggest that the band based upon the πh11/2 configuration is not observed.",

keywords = "Gamma-ray spectroscopy, High-spin states, Proton decay, Quasiparticle alignments, Recoil-decay tagging",

author = "Wady, {P. T.} and Smith, {J. F.} and B. Hadinia and Cullen, {D. M.} and Freeman, {S. J.} and Darby, {I. G.} and S. Eeckhaudt and T. Grahn and Greenlees, {P. T.} and Jones, {P. M.} and R. Julin and S. Juutinen and H. Kettunen and M. Leino and Lepp{\"a}nen, {A. P.} and McGuirk, {B. M.} and P. Nieminen and M. Nyman and Page, {R. D.} and J. Pakarinen and Paul, {E. S.} and P. Rahkila and Rigby, {S. V.} and C. Scholey and J. Uusitalo and R. Wadsworth",

year = "2015",

month = jan,

doi = "10.1016/j.physletb.2014.11.045",

language = "English",

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journal = "Physics Letters B : Nuclear, Elementary Particle and High-Energy Physics",

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Wady, PT, Smith, JF, Hadinia, B, Cullen, DM, Freeman, SJ, Darby, IG, Eeckhaudt, S, Grahn, T, Greenlees, PT, Jones, PM, Julin, R, Juutinen, S, Kettunen, H, Leino, M, Leppänen, AP, McGuirk, BM, Nieminen, P, Nyman, M, Page, RD, Pakarinen, J, Paul, ES, Rahkila, P, Rigby, SV, Scholey, C, Uusitalo, J & Wadsworth, R 2015, 'High-spin states beyond the proton drip-line: Quasiparticle alignments in ¹¹³Cs', Physics Letters B : Nuclear, Elementary Particle and High-Energy Physics, vol. 740, pp. 243-249. https://doi.org/10.1016/j.physletb.2014.11.045

TY - JOUR

T1 - High-spin states beyond the proton drip-line

T2 - Quasiparticle alignments in 113Cs

AU - Wady, P. T.

AU - Smith, J. F.

AU - Hadinia, B.

AU - Cullen, D. M.

AU - Freeman, S. J.

AU - Darby, I. G.

AU - Eeckhaudt, S.

AU - Grahn, T.

AU - Greenlees, P. T.

AU - Jones, P. M.

AU - Julin, R.

AU - Juutinen, S.

AU - Kettunen, H.

AU - Leino, M.

AU - Leppänen, A. P.

AU - McGuirk, B. M.

AU - Nieminen, P.

AU - Nyman, M.

AU - Page, R. D.

AU - Pakarinen, J.

AU - Paul, E. S.

AU - Rahkila, P.

AU - Rigby, S. V.

AU - Scholey, C.

AU - Uusitalo, J.

AU - Wadsworth, R.

PY - 2015/1

Y1 - 2015/1

N2 - Excited states have been studied in the deformed proton emitter 113Cs. Gamma-ray transitions have been unambiguously assigned to 113Cs by correlation with its characteristic proton decay, using the method of recoil-decay tagging. Two previously identified rotational bands have been observed and extended to tentative spins of 45/2 and 51/2h, with excitation energies over 8 MeV above the lowest state. These are the highest angular momenta and excitation energies observed to date in any nucleus beyond the proton drip-line. Transitions in the bands have been rearranged compared to previous work. A study of aligned angular momenta, in comparison to the predictions of Woods-Saxon cranking calculations, is consistent with the most intense band being based on the πg7/2[422]3/2+ configuration, which would contradict the earlier πh11/2 assignment, and with the second band being based on the πd5/2[420]1/2+ configuration. The data suggest that the band based upon the πh11/2 configuration is not observed.

AB - Excited states have been studied in the deformed proton emitter 113Cs. Gamma-ray transitions have been unambiguously assigned to 113Cs by correlation with its characteristic proton decay, using the method of recoil-decay tagging. Two previously identified rotational bands have been observed and extended to tentative spins of 45/2 and 51/2h, with excitation energies over 8 MeV above the lowest state. These are the highest angular momenta and excitation energies observed to date in any nucleus beyond the proton drip-line. Transitions in the bands have been rearranged compared to previous work. A study of aligned angular momenta, in comparison to the predictions of Woods-Saxon cranking calculations, is consistent with the most intense band being based on the πg7/2[422]3/2+ configuration, which would contradict the earlier πh11/2 assignment, and with the second band being based on the πd5/2[420]1/2+ configuration. The data suggest that the band based upon the πh11/2 configuration is not observed.

KW - Gamma-ray spectroscopy

KW - High-spin states

KW - Proton decay

KW - Quasiparticle alignments

KW - Recoil-decay tagging

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U2 - 10.1016/j.physletb.2014.11.045

DO - 10.1016/j.physletb.2014.11.045

M3 - Article

AN - SCOPUS:84916612995

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JO - Physics Letters B : Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters B : Nuclear, Elementary Particle and High-Energy Physics