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Title: Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei

Abstract

The lifetimes of the first excited 2+ states in the N=Z nuclei 80Zr, 78Y, and 76Sr have been measured using the γ-ray line shape method following population via nucleon-knockout reactions from intermediate-energy rare-isotope beams. The extracted reduced electromagnetic transition strengths yield new information on where the collectivity is maximized and provide evidence for a significant, and as yet unexplained, odd-odd vs even-even staggering in the observed values. The experimental results are analyzed in the context of state-of-the-art nuclear density-functional model calculations.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [2];  [3];  [4];  [2];  [2];  [5];  [6];  [7];  [8];  [2];  [2];  [2];  [2];  [1];  [1];  [9];  [2] more »;  [2];  [10];  [1];  [1];  [1];  [2];  [2] « less
  1. University of York (United Kingdom)
  2. Michigan State University, East Lansing, MI (United States)
  3. University of York (United Kingdom); University of Warsaw (Poland)
  4. Legnaro National Laboratory (Italy)
  5. Michigan State University, East Lansing, MI (United States); University of Massachusetts, Lowell, MA (United States)
  6. KTH Department of Physics, Stockholm (Sweden)
  7. Michigan State University, East Lansing, MI (United States); Mississippi State University, Mississippi State, MS (United States)
  8. University of Liverpool (United Kingdom)
  9. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  10. Michigan State University, East Lansing, MI (United States); Ruer Bošković Institute, Zagreb (Croatia)
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States); Michigan State Univ., East Lansing, MI (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); Polish National Science Centre (NCN); USDOE Office of Science (SC)
OSTI Identifier:
1650565
Alternate Identifier(s):
OSTI ID: 1615111; OSTI ID: 1650567
Grant/Contract Number:  
NA0003180; SC0014537; SC0020451; AC02-05CH11231; PHY-1565546; 2018/31/B/ST2/02220
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 124; Journal Issue: 15; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Collective levels; Direct reactions; Electromagnetic transitions; Lifetimes & widths; Nuclear density functional theory; Nuclear fragmentation; 59 ≤ A ≤ 89; Nuclear structure & decays

Citation Formats

Llewellyn, Ryan D. O., Bentley, M.  A., Wadsworth, R., Iwasaki, H., Dobaczewski, J., de Angelis, G., Ash, J., Bazin, D., Bender, P. C., Cederwall, B., Crider, B. P., Doncel, M., Elder, R., Elman, B., Gade, A., Grinder, M., Haylett, T., Jenkins, D. G., Lee, I. Y., Longfellow, B., Lunderberg, E., Mijatović, T., Milne, S. A., Muir, D., Pastore, A., Rhodes, D., and Weisshaar, D. Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei. United States: N. p., 2020. Web. https://doi.org/10.1103/physrevlett.124.152501.
Llewellyn, Ryan D. O., Bentley, M.  A., Wadsworth, R., Iwasaki, H., Dobaczewski, J., de Angelis, G., Ash, J., Bazin, D., Bender, P. C., Cederwall, B., Crider, B. P., Doncel, M., Elder, R., Elman, B., Gade, A., Grinder, M., Haylett, T., Jenkins, D. G., Lee, I. Y., Longfellow, B., Lunderberg, E., Mijatović, T., Milne, S. A., Muir, D., Pastore, A., Rhodes, D., & Weisshaar, D. Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei. United States. https://doi.org/10.1103/physrevlett.124.152501
Llewellyn, Ryan D. O., Bentley, M.  A., Wadsworth, R., Iwasaki, H., Dobaczewski, J., de Angelis, G., Ash, J., Bazin, D., Bender, P. C., Cederwall, B., Crider, B. P., Doncel, M., Elder, R., Elman, B., Gade, A., Grinder, M., Haylett, T., Jenkins, D. G., Lee, I. Y., Longfellow, B., Lunderberg, E., Mijatović, T., Milne, S. A., Muir, D., Pastore, A., Rhodes, D., and Weisshaar, D. Thu . "Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei". United States. https://doi.org/10.1103/physrevlett.124.152501. https://www.osti.gov/servlets/purl/1650565.
@article{osti_1650565,
title = {Establishing the Maximum Collectivity in Highly Deformed N = Z Nuclei},
author = {Llewellyn, Ryan D. O. and Bentley, M.  A. and Wadsworth, R. and Iwasaki, H. and Dobaczewski, J. and de Angelis, G. and Ash, J. and Bazin, D. and Bender, P. C. and Cederwall, B. and Crider, B. P. and Doncel, M. and Elder, R. and Elman, B. and Gade, A. and Grinder, M. and Haylett, T. and Jenkins, D. G. and Lee, I. Y. and Longfellow, B. and Lunderberg, E. and Mijatović, T. and Milne, S. A. and Muir, D. and Pastore, A. and Rhodes, D. and Weisshaar, D.},
abstractNote = {The lifetimes of the first excited 2+ states in the N=Z nuclei 80Zr, 78Y, and 76Sr have been measured using the γ-ray line shape method following population via nucleon-knockout reactions from intermediate-energy rare-isotope beams. The extracted reduced electromagnetic transition strengths yield new information on where the collectivity is maximized and provide evidence for a significant, and as yet unexplained, odd-odd vs even-even staggering in the observed values. The experimental results are analyzed in the context of state-of-the-art nuclear density-functional model calculations.},
doi = {10.1103/physrevlett.124.152501},
journal = {Physical Review Letters},
number = 15,
volume = 124,
place = {United States},
year = {2020},
month = {4}
}

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