Shell structure beyond the proton drip line studied via proton emission from deformed 141Ho

M. Karny, K. P. Rykaczewski, R. K. Grzywacz, J. C. Batchelder, C. R. Bingham, C. Goodin, C. J. Gross, J. H. Hamilton, A. Korgul, W. Królas, S. N. Liddick, K. Li, K. H. Maier, C. Mazzocchi, A. Piechaczek, K. Rykaczewski, D. Schapira, D. Simpson, M. N. Tantawy, J. A. WingerC. H. Yu, E. F. Zganjar, N. Nikolov, J. Dobaczewski, A. T. Kruppa, W. Nazarewicz, M. V. Stoitsov

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Abstract

Fine structure in proton emission from the 7 / 2- [523] ground state and from the 1 / 2+ [411] isomer in deformed nucleus 141Ho was studied by means of fusion-evaporation reactions and digital signal processing. Proton transitions to the first excited 2+ state in 140Dy, with the branching ratio of Ipg s (2+) = 0.9 ± 0.2 % and Ipm (2+) = 1.7 ± 0.5 %, were observed. The data are analyzed within the non-adiabatic weak coupling model assuming a large quadrupole deformation of the daughter nucleus 140Dy as predicted by the self-consistent theory. Implications of this result on coexistence effects around N = 74 are discussed. Significant modifications of the proton shell structure when going from the valley of beta stability to the proton drip line are discussed in terms of self-consistent theory involving the two-body tensor interaction.

Original languageEnglish
Pages (from-to)52-56
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume664
Issue number1-2
DOIs
Publication statusPublished - Jun 12 2008

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Keywords

  • Proton radioactivity
  • Proton shell structure
  • Two-body tensor interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Karny, M., Rykaczewski, K. P., Grzywacz, R. K., Batchelder, J. C., Bingham, C. R., Goodin, C., Gross, C. J., Hamilton, J. H., Korgul, A., Królas, W., Liddick, S. N., Li, K., Maier, K. H., Mazzocchi, C., Piechaczek, A., Rykaczewski, K., Schapira, D., Simpson, D., Tantawy, M. N., ... Stoitsov, M. V. (2008). Shell structure beyond the proton drip line studied via proton emission from deformed 141Ho. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 664(1-2), 52-56. https://doi.org/10.1016/j.physletb.2008.04.056