Skip to main content

Decay of quadrupole-octupole 1-states in Ca 40 and Ce 140

Publication ,  Journal Article
Derya, V; Tsoneva, N; Aumann, T; Bhike, M; Endres, J; Gooden, M; Hennig, A; Isaak, J; Lenske, H; Löher, B; Pietralla, N; Savran, D; Tornow, W ...
Published in: Physical Review C
March 10, 2016

Background: Two-phonon excitations originating from the coupling of two collective one-phonon states are of great interest in nuclear structure physics. One possibility to generate low-lying E1 excitations is the coupling of quadrupole and octupole phonons. Purpose: In this work, the γ-decay behavior of candidates for the (21+ - 31-)1- state in the doubly magic nucleus Ca40 and in the heavier and semimagic nucleus Ce140 is investigated. Methods: (γ - ,γ′) experiments have been carried out at the High Intensity γ-ray Source (HIγS) facility in combination with the high-efficiency γ-ray spectroscopy setup γ3 consisting of HPGe and LaBr3 detectors. The setup enables the acquisition of γ-γ coincidence data and, hence, the detection of direct decay paths. Results: In addition to the known ground-state decays, for Ca40 the decay into the 31- state was observed, while for Ce140 the direct decays into the 21+ and the 02+ state were detected. The experimentally deduced transition strengths and excitation energies are compared to theoretical calculations in the framework of EDF theory plus QPM approach and systematically analyzed for N=82 isotones. In addition, negative parities for two J=1 states in Ca44 were deduced simultaneously. Conclusions: The experimental findings together with the theoretical calculations support the two-phonon character of the 11- excitation in the light-to-medium-mass nucleus Ca40 as well as in the stable even-even N=82 nuclei.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

March 10, 2016

Volume

93

Issue

3

Related Subject Headings

  • 5106 Nuclear and plasma physics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Derya, V., Tsoneva, N., Aumann, T., Bhike, M., Endres, J., Gooden, M., … Zilges, A. (2016). Decay of quadrupole-octupole 1-states in Ca 40 and Ce 140. Physical Review C, 93(3). https://doi.org/10.1103/PhysRevC.93.034311
Derya, V., N. Tsoneva, T. Aumann, M. Bhike, J. Endres, M. Gooden, A. Hennig, et al. “Decay of quadrupole-octupole 1-states in Ca 40 and Ce 140.” Physical Review C 93, no. 3 (March 10, 2016). https://doi.org/10.1103/PhysRevC.93.034311.
Derya V, Tsoneva N, Aumann T, Bhike M, Endres J, Gooden M, et al. Decay of quadrupole-octupole 1-states in Ca 40 and Ce 140. Physical Review C. 2016 Mar 10;93(3).
Derya, V., et al. “Decay of quadrupole-octupole 1-states in Ca 40 and Ce 140.” Physical Review C, vol. 93, no. 3, Mar. 2016. Scopus, doi:10.1103/PhysRevC.93.034311.
Derya V, Tsoneva N, Aumann T, Bhike M, Endres J, Gooden M, Hennig A, Isaak J, Lenske H, Löher B, Pietralla N, Savran D, Tornow W, Werner V, Zilges A. Decay of quadrupole-octupole 1-states in Ca 40 and Ce 140. Physical Review C. 2016 Mar 10;93(3).

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

March 10, 2016

Volume

93

Issue

3

Related Subject Headings

  • 5106 Nuclear and plasma physics