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Lifetime measurements in Re-166: Collective versus magnetic rotation
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.ORCID iD: 0000-0003-2843-0582
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0003-1771-2656
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0003-1996-0805
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Number of Authors: 40
2016 (English)In: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 93, no 3, 034309Article in journal (Refereed) PublishedText
Abstract [en]

Lifetimes of excited states in the neutron-deficient odd-odd nucleus Re-166 have been measured for the first time using the recoil distance Doppler-shift method. The measured lifetime for the (8(-)) state; tau = 480 (80) ps, enabled an assessment of the multipolarities of the gamma rays depopulating this state. Information on electromagnetic transition strengths were deduced for the gamma-ray transitions from the (9(-)), (10(-)), and (11(-)) states, and in the case of the (10(-)) and (11(-)) states limits on the B (M1) and B(E2) strengths were estimated. The results are compared with total Routhian surface predictions and semiclassical calculations. Tilted-axis cranking calculations based on a relativistic mean-field approach (TAC-RMF) have also been performed in order to test the possibility of magnetic rotation in the 166Re nucleus. While the TAC-RMF calculations predict a quadrupole-deformed nuclear shape with similar beta(2) deformation as obtained by using the TRS model, it was found that the experimental electromagnetic transition rates are in better agreement with a collective -rotational description.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 93, no 3, 034309
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-184527DOI: 10.1103/PhysRevC.93.034309ISI: 000371740600004ScopusID: 2-s2.0-84960540453OAI: oai:DiVA.org:kth-184527DiVA: diva2:917461
Funder
Swedish Research Council, 621-2010-3694
Note

QC 20160406

Available from: 2016-04-06 Created: 2016-04-01 Last updated: 2016-04-06Bibliographically approved

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