Octupole deformation in Sm149,151 nuclei

Somapriya Basu, J. M. Chatterjee, D. Banik, R. K. Chattopadhyay, R. P. Sharma, and S. K. Pardha Saradhi
Phys. Rev. C 49, 650 – Published 1 February 1994
PDFExport Citation

Abstract

Parity doublet states and alternating parity bands in Sm149,151 nuclei observed in Nd148,150 (α,3nγ) reactions at Eα=37 and 35 MeV are presented here. Nineteen new transitions in Sm149 and sixteen in Sm151 have been observed in singles and γ-γ-t-r.f. coincidence experiments. Four alternating parity bands in Sm149 and two in Sm151 characterized by simplex quantum numbers are reported. The observed level schemes are interpreted in terms of octupole deformation. The energy difference due to parity splitting, collective rotational parameters, quasiparticle Routhians, single particle angular momentum alignments of bands with simplex quantum number si in Sm149 and with s=-i in Sm151 have been calculated from the experimental results. From the E1, E2 branching ratios, the electric dipole moments are deduced to be 〈D0〉=0.19±0.08 e fm for Sm149 and 〈D0〉=0.36±0.11 e fm for Sm151. The parameter C1, a function of the symmetry energy coefficient, has been estimated for Sm149 from the liquid drop model of Strutinsky for deformed nucleus, and has been found to be C1=0.0020030.000159+0.000087 fm.

  • Received 25 May 1993

DOI:https://doi.org/10.1103/PhysRevC.49.650

©1994 American Physical Society

Authors & Affiliations

Somapriya Basu, J. M. Chatterjee, and D. Banik

  • Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta-700064, India

R. K. Chattopadhyay

  • Ananda Mohan College, 102/1 Amherst Street, Calcutta-700009, India

R. P. Sharma and S. K. Pardha Saradhi

  • Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Calcutta-700 064, India

References (Subscription Required)

Click to Expand
Issue

Vol. 49, Iss. 2 — February 1994

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×