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Spectroscopy of Po-212 and At-213 using a He-8 radioactive beam and EXOGAM
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2005 (English)In: Journal of Physics G: Nuclear and Particle Physics, ISSN 0954-3899, E-ISSN 1361-6471, Vol. 31, no 10, S1851-S1854 p.Article in journal (Refereed) Published
Abstract [en]

A beam of 28 MeV He-8 particles with an average intensity 2 x 10(5) ions s(-1), produced by the SPIRAL facility at GANIL, was used to initiate fusion-evaporation reactions in thick targets of Pb-201 and Bi-209. Excited states of Po-212 and At-213 were populated in (He-8,4n) reactions. The emitted gamma-rays were detected using the EXOGAM array composed of four Compton suppressed germanium Clover detectors in a close geometry configuration. Preliminary results show that Po-212 has been populated to high spin (I similar or equal to 14) with a significantly increased yield compared with our previous He-8 beam experiment. An apparently increased relative population of states up to 12(+) was observed compared with published results from a Pb-208(Be-9,alpha n)(212) Po reaction at 48 MeV. Evidence is presented for a previously unreported de-excitation pathway: 69 keV (13(-) -> 12(+)). States up to I-pi = (39/2(-)) have also been observed in At-213.

Place, publisher, year, edition, pages
2005. Vol. 31, no 10, S1851-S1854 p.
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Physical Sciences
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URN: urn:nbn:se:kth:diva-15121DOI: 10.1088/0954-3899/31/10/086ISI: 000232575600088Scopus ID: 2-s2.0-25444458043OAI: oai:DiVA.org:kth-15121DiVA: diva2:333162
Note
QC 20100525 QC 20111012Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-10-12Bibliographically approved

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Cederwall, Bo

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