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Title: Shell Structure Beyond the Proton Drip Line Studied via Proton Emission from Deformed 141Ho

Abstract

Fine structure in proton emission from the 7/2{sup -}[523] ground state and from the 1/2{sup +}[411] isomer in deformed nucleus {sup 141}Ho was studied by means of fusion-evaporation reactions and digital signal processing. Proton transitions to the first excited 2{sup +} state in {sup 140}Dy, with the branching ratio of I{sub p}{sup gs}(2{sup +}) = 0.9 {+-} 0.2% and I{sub p}{sup m}(2{sup +}) = 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 {sup 140}Dy 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.

Authors:
 [1];  [2];  [3];  [4];  [3];  [5];  [2];  [5];  [1];  [6];  [3];  [5];  [2];  [3];  [7];  [8];  [2];  [3];  [3];  [9] more »;  [2];  [7];  [2];  [2];  [2];  [2];  [2] « less
  1. University of Warsaw
  2. ORNL
  3. University of Tennessee, Knoxville (UTK)
  4. Oak Ridge Associated Universities (ORAU)
  5. Vanderbilt University
  6. Joint Institute for Heavy Ion Research, Oak Ridge
  7. Louisiana State University
  8. Georgia Institute of Technology
  9. Mississippi State University (MSU)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Holifield Radioactive Ion Beam Facility
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
937538
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics Letters B; Journal Volume: 664; Journal Issue: 1-2
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BRANCHING RATIO; DEFORMATION; FINE STRUCTURE; GROUND STATES; ISOMERS; MODIFICATIONS; PROCESSING; PROTONS; QUADRUPOLES; STABILITY; WEAK-COUPLING MODEL

Citation Formats

Karny, M., Rykaczewski, Krzysztof Piotr, Grzywacz, R., Batchelder, J. C., Bingham, C. R., Goodin, C., Gross, Carl J, Hamilton, J. H., Korgul, A., Krolas, W., Liddick, Sean, Li, K., Maier, Karl, Mazzocchi, C., Piechaczek, A., Rykaczewski, K., Shapira, Dan, Simpson, D., Tantawy, M. N., Winger, J. A., Yu, Chang-Hong, Zganjar, E. F., Nikolov, Nikola I, Dobaczewski, Jacek, Kruppa, Andras Tibor, Nazarewicz, Witold, and Stoitsov, Mario. Shell Structure Beyond the Proton Drip Line Studied via Proton Emission from Deformed 141Ho. United States: N. p., 2008. Web. doi:10.1016/j.physletb.2008.04.056.
Karny, M., Rykaczewski, Krzysztof Piotr, Grzywacz, R., Batchelder, J. C., Bingham, C. R., Goodin, C., Gross, Carl J, Hamilton, J. H., Korgul, A., Krolas, W., Liddick, Sean, Li, K., Maier, Karl, Mazzocchi, C., Piechaczek, A., Rykaczewski, K., Shapira, Dan, Simpson, D., Tantawy, M. N., Winger, J. A., Yu, Chang-Hong, Zganjar, E. F., Nikolov, Nikola I, Dobaczewski, Jacek, Kruppa, Andras Tibor, Nazarewicz, Witold, & Stoitsov, Mario. Shell Structure Beyond the Proton Drip Line Studied via Proton Emission from Deformed 141Ho. United States. doi:10.1016/j.physletb.2008.04.056.
Karny, M., Rykaczewski, Krzysztof Piotr, Grzywacz, R., Batchelder, J. C., Bingham, C. R., Goodin, C., Gross, Carl J, Hamilton, J. H., Korgul, A., Krolas, W., Liddick, Sean, Li, K., Maier, Karl, Mazzocchi, C., Piechaczek, A., Rykaczewski, K., Shapira, Dan, Simpson, D., Tantawy, M. N., Winger, J. A., Yu, Chang-Hong, Zganjar, E. F., Nikolov, Nikola I, Dobaczewski, Jacek, Kruppa, Andras Tibor, Nazarewicz, Witold, and Stoitsov, Mario. Sun . "Shell Structure Beyond the Proton Drip Line Studied via Proton Emission from Deformed 141Ho". United States. doi:10.1016/j.physletb.2008.04.056.
@article{osti_937538,
title = {Shell Structure Beyond the Proton Drip Line Studied via Proton Emission from Deformed 141Ho},
author = {Karny, M. and Rykaczewski, Krzysztof Piotr and Grzywacz, R. and Batchelder, J. C. and Bingham, C. R. and Goodin, C. and Gross, Carl J and Hamilton, J. H. and Korgul, A. and Krolas, W. and Liddick, Sean and Li, K. and Maier, Karl and Mazzocchi, C. and Piechaczek, A. and Rykaczewski, K. and Shapira, Dan and Simpson, D. and Tantawy, M. N. and Winger, J. A. and Yu, Chang-Hong and Zganjar, E. F. and Nikolov, Nikola I and Dobaczewski, Jacek and Kruppa, Andras Tibor and Nazarewicz, Witold and Stoitsov, Mario},
abstractNote = {Fine structure in proton emission from the 7/2{sup -}[523] ground state and from the 1/2{sup +}[411] isomer in deformed nucleus {sup 141}Ho was studied by means of fusion-evaporation reactions and digital signal processing. Proton transitions to the first excited 2{sup +} state in {sup 140}Dy, with the branching ratio of I{sub p}{sup gs}(2{sup +}) = 0.9 {+-} 0.2% and I{sub p}{sup m}(2{sup +}) = 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 {sup 140}Dy 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.},
doi = {10.1016/j.physletb.2008.04.056},
journal = {Physics Letters B},
number = 1-2,
volume = 664,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 2008},
month = {Sun Jun 01 00:00:00 EDT 2008}
}