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23 April 2024

» pubmed » pmid15903912

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Direct observation of the ... 4+-to-2+ ... [corrected] gamma transition in 8Be
V M Datar ; Suresh Kumar ; D R Chakrabarty ; V Nanal ; E T Mirgule ; A Mitra ; H H Oza ;
Date:	1 Apr 2005
Journal:	Phys Rev Lett, 94 (12), 122502
Abstract:	Electromagnetic transition rates provide an important test for nuclear structure models. The nucleus 8Be exhibits a pronounced alpha-cluster structure and is a building block for more complex cluster nuclei. Here we report on the first observation of the gamma transition between the 4(+) and 2(+) states of 8Be in the 4He+4He reaction. The measured on-resonance cross section of 165+/-54 nb leads to a B(E2) of25+/-8e(2) fm(4), in good agreement with alpha-cluster models and sophisticated ab initio structure calculations.
Source:	PubMed, pmid15903912
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