Fast-timing measurements in the ground-state band of Pd114

Gamba, E. R.; Bruce, A. M.; Lalkovski, S.; Rudigier, M.; Bottoni, S.; Carpenter, M. P.; Zhu, S.; Anderson, J. T.; Ayangeakaa, A. D.; Berry, T. A.; Burrows, I.; Gallardo, M. Carmona; Carroll, R. J.; Copp, P.; Cullen, D. M.; Daniel, T.; Martínez, G. Fernández; Greene, J. P.; Gurgi, L. A.; Hartley, D. J.; Ilieva, R.; Ilieva, S.; Kondev, F. G.; Kröll, T.; Lane, G. J.; Lauritsen, T.; Lazarus, I.; Lotay, G.; Niţă, C. R.; Podolyák, Zs.; Pucknell, V.; Reed, M.; Regan, P. H.; Rohrer, J.; Sethi, J.; Seweryniak, D.; Shand, C. M.; Simpson, J.; Smoleń, M.; Stefanova, E. A.; Vedia, V.; Yordanov, O.

doi:10.1103/PhysRevC.100.044309

Title: Fast-timing measurements in the ground-state band of ${}^{114}{Pd}$

Journal Article · Fri Oct 11 00:00:00 EDT 2019 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.100.044309· OSTI ID:1607453

^[1]; Bruce, A. M. ^[1]; Lalkovski, S. ^[2]; Rudigier, M. ^[3]; Bottoni, S. ^[4]; Carpenter, M. P. ^[5]; Zhu, S. ^[5]; Anderson, J. T. ^[5]; Ayangeakaa, A. D. ^[6]; Berry, T. A. ^[3]; Burrows, I. ^[7]; Gallardo, M. Carmona ^[8]; Carroll, R. J. ^[3]; Copp, P. ^[9]; Cullen, D. M. ^[10]; Daniel, T. ^[11]; Martínez, G. Fernández ^[12]; Greene, J. P. ^[5]; Gurgi, L. A. ^[3]; Hartley, D. J. ^[13] more »

Univ. of Brighton (United Kingdom). School of Computing, Engineering and Mathematics
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics; Univ. of Sofia “St. Kl. Ohridski” (Bulgaria). Dept. of Nuclear Engineering
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Istituto Nazionale di Fisica Nucleare (INFN), Milano (Italy); Univ. degli Studi di Milano (Italy). Dipartimento di Fisica
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; US Naval Academy, Annapolis, MD (United States)
Science and Technology Facilities Council (STFC), Daresbury (United Kingdom). Daresbury Lab.
Univ. Complutense Madrid (Spain). Grupo de Física Nuclear
Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics and Applied Physics
Univ. of Manchester (United Kingdom). School of Physics and Astronomy
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics; Benue State Univ. (Nigeria). Dept. of Physics
Technische Univ. Darmstadt (Germany). Inst. fur Kernphysik
US Naval Academy, Annapolis, MD (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Nuclear Engineering Division
Australian National Univ., Canberra, ACT (Australia). Research School of Physical Sciences and Engineering, Dept. of Nuclear Physics
Horia Hulubei National Inst. of Physics and Nuclear Engineering, Bucharest-Măgurele (Romania)
Univ. of Surrey, Guildford (United Kingdom). Dept. of Physics; National Physical Lab., Teddington (United Kingdom). AIR Division
Univ. of the West of Scotland, Paisley (United Kingdom). School of Engineering and Science
Bulgarian Academy of Sciences, Sofia (Bulgaria); Inst. for Nuclear Researches and Nuclear Energy (INRNE)

Using a hybrid Gammasphere array coupled to 25 ${LaBr}_{3} (Ce)$ detectors, the lifetimes of the first three levels of the yrast band in ${}_{114}{Pd}$ , populated via ${}_{252}{Cf}$ decay, have been measured. The measured lifetimes are $τ_{2^{+}} = 103 (10) ps, τ_{4^{+}} = 22 (13) ps$ , and $τ_{6^{+}} \leq 10 ps$ for the $2_{1}^{+}, 4_{1}^{+}$ , and $6_{1}^{+}$ levels, respectively. Palladium-114 was previously predicted to be the most deformed isotope of its isotopic chain, and spectroscopic studies have suggested it might also be a candidate nucleus for low-spin stable triaxiality. From the lifetimes measured here, reduced transition probabilities $B (E 2; J \to J - 2)$ are calculated and compared with interacting boson model, projected shell model, and collective model calculations from the literature. The experimental ratio $R_{B (E 2)} = B (E 2; 4_{1}^{+} \to 2_{1}^{+}) / B (E 2; 2_{1}^{+} \to 0_{1}^{+}) = 0.80 (42)$ is measured for the first time in ${}_{114}{Pd}$ and compared with the known values $R_{B (E 2)}$ in the palladium isotopic chain: the systematics suggest that, for $N = 68$ , a transition from $γ$ -unstable to a more rigid $γ$ -deformed nuclear shape occurs.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Science and Technology Facility Council (STFC); National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357; ST/L005840/1; ST/L005743/1; ST/G000751/1; PHY-1502092

OSTI ID:: 1607453

Alternate ID(s):: OSTI ID: 1570072

Journal Information:: Physical Review C, Vol. 100, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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