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Title: High-spin terminating states in the N = 88 Ho 155 and Er 156 isotones

Abstract

Here, the 124Sn( 37Cl,6nγ) fusion-evaporation reaction at a bombarding energy of 180 MeV has been used to significantly extend the excitation level scheme of 155 67Ho 88. The collective rotational behavior of this nucleus breaks down above spin I ~ 30 and a fully aligned noncollective (band terminating) state has been identified at I π = 79/2 . Comparison with cranked Nilsson–Strutinsky calculations also provides evidence for core-excited noncollective states at I π = 87/2 and (89/2+) involving particle-hole excitations across the Z = 64 shell gap. A similar core-excited state in 156 68Er 88 at I π = (46 +) is also presented.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [1];  [8];  [5];  [5];  [5];  [5];  [2];  [7];  [3];  [1];  [2];  [9] more »;  [10];  [1];  [11];  [5];  [12];  [12] « less
  1. Univ. of Liverpool, Liverpool (United Kingdom)
  2. STFC Daresbury Lab., Warrington (United Kingdom)
  3. Florida State Univ., Tallahassee, FL (United States)
  4. Univ. of Notre Dame, Notre Dame, IN (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States); U.S. Army Research Lab., Adelphi, MD (United States)
  7. Univ. of Notre Dame, Notre Dame, IN (United States)
  8. United States Naval Academy, Annapolis, MD (United States)
  9. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Technische Univ. Darmstadt, Darmstadt (Germany)
  10. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  11. Florida State Univ., Tallahassee, FL (United States); California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States)
  12. Lund Univ., Lund (Sweden)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1338507
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 5; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Rees, J. M., Paul, E. S., Simpson, J., Riley, M. A., Ayangeakaa, A. D., Carpenter, M. P., Chiara, C. J., Garg, U., Hampson, P., Hartley, D. J., Hoffman, C. R., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Mason, P. J. R., Matta, J., Miller, S. L., Nolan, P. J., Ollier, J., Petri, M., Radford, D. C., Revill, J. P., Wang, X., Zhu, S., Gellanki, J., and Ragnarsson, I. High-spin terminating states in the N=88 Ho155 and Er156 isotones. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.91.054301.
Rees, J. M., Paul, E. S., Simpson, J., Riley, M. A., Ayangeakaa, A. D., Carpenter, M. P., Chiara, C. J., Garg, U., Hampson, P., Hartley, D. J., Hoffman, C. R., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Mason, P. J. R., Matta, J., Miller, S. L., Nolan, P. J., Ollier, J., Petri, M., Radford, D. C., Revill, J. P., Wang, X., Zhu, S., Gellanki, J., & Ragnarsson, I. High-spin terminating states in the N=88 Ho155 and Er156 isotones. United States. https://doi.org/10.1103/PhysRevC.91.054301
Rees, J. M., Paul, E. S., Simpson, J., Riley, M. A., Ayangeakaa, A. D., Carpenter, M. P., Chiara, C. J., Garg, U., Hampson, P., Hartley, D. J., Hoffman, C. R., Janssens, R. V. F., Kondev, F. G., Lauritsen, T., Mason, P. J. R., Matta, J., Miller, S. L., Nolan, P. J., Ollier, J., Petri, M., Radford, D. C., Revill, J. P., Wang, X., Zhu, S., Gellanki, J., and Ragnarsson, I. Tue . "High-spin terminating states in the N=88 Ho155 and Er156 isotones". United States. https://doi.org/10.1103/PhysRevC.91.054301.
@article{osti_1338507,
title = {High-spin terminating states in the N=88 Ho155 and Er156 isotones},
author = {Rees, J. M. and Paul, E. S. and Simpson, J. and Riley, M. A. and Ayangeakaa, A. D. and Carpenter, M. P. and Chiara, C. J. and Garg, U. and Hampson, P. and Hartley, D. J. and Hoffman, C. R. and Janssens, R. V. F. and Kondev, F. G. and Lauritsen, T. and Mason, P. J. R. and Matta, J. and Miller, S. L. and Nolan, P. J. and Ollier, J. and Petri, M. and Radford, D. C. and Revill, J. P. and Wang, X. and Zhu, S. and Gellanki, J. and Ragnarsson, I.},
abstractNote = {Here, the 124Sn(37Cl,6nγ) fusion-evaporation reaction at a bombarding energy of 180 MeV has been used to significantly extend the excitation level scheme of 15567Ho88. The collective rotational behavior of this nucleus breaks down above spin I ~ 30 and a fully aligned noncollective (band terminating) state has been identified at Iπ = 79/2–. Comparison with cranked Nilsson–Strutinsky calculations also provides evidence for core-excited noncollective states at Iπ = 87/2– and (89/2+) involving particle-hole excitations across the Z = 64 shell gap. A similar core-excited state in 15668Er88 at Iπ = (46+) is also presented.},
doi = {10.1103/PhysRevC.91.054301},
url = {https://www.osti.gov/biblio/1338507}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 91,
place = {United States},
year = {2015},
month = {5}
}

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  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 364, Issue 3
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