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Possible quenching of static neutron pairing near the N=98 deformed shell gap: Rotational structures in 160,161Gd

Journal Article · · Physical Review C
 [1];  [2];  [3];  [4];  [5];  [3];  [6];  [4];  [7];  [3];  [3];  [3];  [7];  [3];  [8];  [3];  [9];  [10];  [7];  [3] more »;  [3];  [11];  [3];  [12];  [3];  [13];  [14] « less
  1. US Naval Academy, Annapolis, MD (United States); Univ of NC - Chapel Hill
  2. Florida State Univ., Tallahassee, FL (United States); Intel Ocotillo Campus, Chandler, AZ (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Florida State Univ., Tallahassee, FL (United States)
  5. Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
  6. US Naval Academy, Annapolis, MD (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
  7. Univ. of Liverpool (United Kingdom)
  8. US Naval Academy, Annapolis, MD (United States)
  9. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  10. Univ. of North Carolina, Chapel Hill, NC (United States)
  11. Science and Technology Facilities Council (STFC), Daresbury (United Kingdom). Daresbury Lab.
  12. Louisiana State Univ., Baton Rouge, LA (United States)
  13. Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  14. Univ. of Notre Dame, IN (United States)
+ Show Author Affiliations
A 160Gd beam was accelerated to an energy of 1000 MeV and, separately, bombarded thick targets of 154Sm and 164Dy in order to observe neutron-rich, rare-earth nuclei via deep-inelastic collision processes. Gammasphere was utilized to observe g-ray emissions. Here, many new states and transitions were observed in 160Gd as a result of so-called "unsafe" Coulomb excitation. The ground-state band in 160Gd has been extended to Iπ = 20+ and a rotational band based on the Kπ = 4+ state, previously associated with a hexadecapole vibration, was observed up to 18+. The quasiparticle configuration of the Kπ = 4+ band has been determined, and its unusual alignment behavior may result from a possible quenching of static neutron pairing. In addition, the band based on the [523]5/2 quasineutron orbital in 161Gd was extended from 11/2– to 33/2–, and also displays the same unusual alignment behavior.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory; Univ. of North Carolina, Chapel Hill, NC (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-06CH11357; FG02-97ER41033; FG02-97ER41041
OSTI ID:
1772887
Alternate ID(s):
OSTI ID: 1785716
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 103; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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