RDM-lifetime study in {sup 125}La
- and others
Recoil Distance Method (RDM) lifetime measurements have been carried out at Stony Brook for the {sup 125}La nucleus to examine the collective structure of the decoupled band based on the unique parity {pi}h{sub 11/2}[550]1/2 orbital in comparison to that of the {sup 124}Ba core. The {sup 94}Mo({sup 35}Cl,2p2n) reaction was used at a beam energy of 155 MeV in conjunction with the Notre Dame plunger. Five BGO-suppressed Ge detectors were employed at {+-}30{degrees}, 90{degrees}, 123{degrees}, and 150{degrees} relative to the beam direction to measure the stopped and shifted {gamma}-ray peaks as a function of target-stopper distance. A 14-element BGO multiplicity filter surrounding the target was recorded along with the {gamma}-ray singles events to allow background reduction from Coulex and radioactivity. Preliminary meanlife slopes observed at 30{degrees}for the 15/2{sup {minus}}, 19/2{sup {minus}}, and 23/2{sup {minus}} band members were 140(20), 9(3), and 2(2) ps, respectively. Multiple-level fits and time-dependent alignment corrections have not been made. The resulting B(E2) values will be compared with theoretical calculations.
- OSTI ID:
- 374924
- Report Number(s):
- CONF-9304297--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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