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Gamma-ray fast-timing coincidence measurements from the (18)O+(18)O fusion-evaporation reaction using a mixed LaBr(3)-HPGe array

Alharbi, T, Mason, PJ, Regan, PH, Podolyák, Z, Mărginean, N, Nakhostin, M, Bowry, M, Bucurescu, D, Căta-Danil, G, Căta-Danil, I, Deleanu, D, Filipescu, D, Glodariu, T, Ghiţă, D, Mărginean, R, Mihai, C, Negret, A, Pascu, S, Sava, T, Stroe, L, Suliman, G, Zamfir, NV, Bruce, AM, Rodriguez Triguero, C, Bender, PC, Garg, U, Erduran, MN, Kusoglu, A, Bostan, M, Detistov, P, Alkhomashi, N, Sinha, AK, Chakrabarti, R and Ghugre, SS (2012) Gamma-ray fast-timing coincidence measurements from the (18)O+(18)O fusion-evaporation reaction using a mixed LaBr(3)-HPGe array Appl Radiat Isot, 70 (7). 1337 - 1339. ISSN 0969-8043

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Abstract

We report on a gamma-ray coincidence analysis using a mixed array of hyperpure germanium and cerium-doped lanthanum tri-bromide (LaBr(3):Ce) scintillation detectors to study nuclear electromagnetic transition rates in the pico-to-nanosecond time regime in (33,34)P and (33)S following fusion-evaporation reactions between an (18)O beam and an isotopically enriched (18)O implanted tantalum target. Energies from decay gamma-rays associated with the reaction residues were measured in event-by-event coincidence mode, with the measured time difference information between the pairs of gamma-rays in each event also recorded using the ultra-fast coincidence timing technique. The experiment used the good full-energy peak resolution of the LaBr(3):Ce detectors coupled with their excellent timing responses in order to determine the excited state lifetime associated with the lowest lying, cross-shell, I(π)=4(-) "intruder" state previously reported in the N=19 isotone (34)P. The extracted lifetime is consistent with a mainly single-particle M2 multipolarity associated with a f(7/2)→d(5/2) single particle transition.

Item Type: Article
Additional Information: NOTICE: This is the author’s version of a work that was accepted for publication in Apple Radiation Isotope. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Apple Radiation Isotope, 70(7), July 2012, DOI 10.1016/j.apradiso.2011.11.040.
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Symplectic Elements
Date Deposited: 03 Sep 2012 11:50
Last Modified: 23 Sep 2013 19:01
URI: http://epubs.surrey.ac.uk/id/eprint/121084

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