Lifetimes and electromagnetic transition strength in 157Dy

21st International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei

Gladnishki, K.A.^1 ; Petkov, P.^2,3 ; Dewald, A.^3 ; Jolie, J.^3 ; Möller, O.^3 ; Saha, B.^3 ; Fitzler, A.^3 ; Jessen, K.^3 ; Tonev, D.^2 ; Klug, T.^3 ; Heinze, S.^3 ; Von Brentano, P.^3 ; Rainovski, G.^1 ; Trichkova, M.^1 ; Bazzacco, D.^4 ; Ur, C.A.^4,7 ; Farnea, E.^4,5 ; Axiotis, M.^5,6 ; Lunardi, S.^4 ; De Angelis, G.^5 ; Napoli, D.R.^5 ; Marginean, N.^5,7 ; Martinez, T.^5 ; Caprio, M.A.^8,9

Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia

1164, Bulgaria^1

Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Sofia

1784, Bulgaria^2

Institut für Kernphysik, Universität zu Köln, Köln

D-50937, Germany^3

Dipartimento di Fisica and INFN, Sezione di Padova, Padova, Italy^4

INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy^5

TANDEM Accelerator Laboratory, Institute of Nuclear Physics, NCSR Demokritos, Athens, Greece^6

Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele

RO-077125, Romania^7

Wright Nuclear Structure Laboratory, Yale University, New Haven

CT, United States^8

Department of Physics, University of Notre Dame, Indiana

ND

46556-5670, United States^9

关键词: Beam energies;    Coincidence measurement;    Coincidence mode;    Differential decays;    Dopplershift;    Electromagnetic transition strengths;    GASP arrays;    Lifetime measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/724/1/012017/pdf
DOI  :  10.1088/1742-6596/724/1/012017

来源: IOP

【 摘 要 】

Excited states in157Dy have been studied by γ-γ coincidence measurements via the reaction124Sn(36S,3n) at a beam energy of 155MeV. Lifetimes of the relatively lower-spin states in157Dy were measured by means of the Recoil Distance Dopplershift technique in the coincidence mode. The experiment was performed at the Laboratori Nazionali di Legnaro with the GASP array and the Cologne plunger device. With the same setup a Doppler- shift attenuation (DSA) lifetime measurement was performed for the higher spin states. The Differential decay-curve method was applied for the lifetime determination.