The investigation of dipole excitations in double-even 184W nuclei at the spectroscopic energy region
Abstract
The dipole excitations of double-even nucleus 184W are studied using the QRPA model with rotational, translational and Galilean invariant Hamilonian. This approach not only gives opportunity to test for the validity of the present theory and it also allows for the interpretation of the experimentally spin unknown states. The analysis of calculation shows that M1 strength, mainly an orbital character predicted from calculations of orbit-to-spin ratio, has a relative contribution, rougly 63% with summed M1 widths ΣΓ0red (M 1) = 5 . 3meV between 2<ωi<3.7 MeV, to summed ground-state decay widths of dipole mode. The experimental summed widths in the same energy interval is ΣΓored (exp) = 4.73 +/- 1.28 meV. On the other hand, several well pronounced electric dipole K = 1 excitation in spectroscopic region where mainly fulled with M1 dipole states is predicted. The total E1 widths with K = 1 is ΣΓ0red (E 1) = 2 . 62meV (30% of the summed widths), quite close to the experimental value with K = 0 ΣΓored (exp) = 2.09 +/- 0.59 meV. The theory also indicates a few positive (ΣΓ0red (M 1) = 0 . 24meV) and negative parity ΣΓ0red (E 1) = 0 . 34meV with K = 0 states with summed widths, respectively.
- Publication:
-
APS April Meeting Abstracts
- Pub Date:
- March 2014
- DOI:
- 10.1103/BAPS.2014.APRIL.T1.19
- Bibcode:
- 2014APS..APR.T1019Z