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Title: Investigation of negative-parity states in Dy 156 : Search for evidence of tetrahedral symmetry

An experiment populating low/medium-spin states in 156Dy was performed to investigate the possibility of tetrahedral symmetry in this nucleus. In particular, focus was placed on the low-spin, negative-parity states since recent theoretical studies suggest that these may be good candidates for this high-rank symmetry. The states were produced in the 148Nd( 12C,4 n) reaction and the Gammasphere array was utilized to detect the emitted rays. B(E 2) /B(E1) ratios of transition probabilities from the low-spin, negative-parity bands were determined and used to interpret whether these structures are best associated with tetrahedral symmetry or, as previously assigned, to octupole vibrations. Additionally, several other negative-parity structures were observed to higher spin and two new sequences were established
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Publication Date:
Report Number(s):
BNL-112415-2016-JA
Journal ID: ISSN 2469-9985; PRVCAN; R&D Project: EST-003-NEFA; KB0301041
Grant/Contract Number:
SC00112704; AC05-00OR22725; AC02-98CD10886; AC02-06CH11357; FG02-94ER40848; FG02-96ER40983; FG02-91ER40609; FG02-94ER40834; PHY-1203100; PHY-0754674
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
APS
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Florida State Univ., Tallahassee, FL (United States); U.S. Naval Academy, Annapolis, MD (United States); Univ. of Tennessee, Knoxville, TN (United States); Yale Univ., New Haven, CT (United States); Univ. of Maryland, College Park, MD (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF); Science and Technology Facilities Council (STFC) (United Kingdom); National Research Foundation (NRF) (South Africa)
Contributing Orgs:
National Research Foundation (NRF), Somerset West (South Africa); Univ. of Richmond, VA (United States); Univ. of Strasbourg (France); National Centre for Scientific Research (CNRS), Strasbourg (France); Univ. of Guelph, ON (Canada); Georgia Inst. of Technology, Atlanta, GA (United States); Inst. of Nuclear Physics (IPNL), Lyon (France); Univ. of Western Cape, Bellville (South Africa); Science and Technology Facilities Council (STFC), Daresbury (United Kingdom); University of Marie Curie-Sklodowska, Lublin (Poland)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1336059
Alternate Identifier(s):
OSTI ID: 1340474; OSTI ID: 1341291