Elsevier

Physics Letters B

Volume 74, Issue 3, 10 April 1978, Pages 191-194
Physics Letters B

Dominance of α decay from the isoscalar giant quadrupole resonance in 16O

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Abstract

The charged particle (c) decay of the isoscalar giant quadrupole resonance in a 16O has been studied in a 16O(α,α'c) coincidence experiment at Eα=155 MeV. The J=2 character of this resonance was established by angular correaltion measurements. Its dominant decay proceeds through the α1 channel which contains about 40% of the E2 energy weighted sum rule. This explains difficulties of capture reactions to locate the GQR.

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    Citation Excerpt :

    The GQR in 40Ca is fragmented in at least two components, one centered at around 14.0 MeV and the other around 17.8 MeV, each exhausting around 40% of the EWSR [1]. Its decay by alpha-particles has already been studied with different probes: alpha-particle inelastic scattering [8–10], proton inelastic scattering [11] and electron inelastic scattering [12–14]. These previous data did not indicate a significant deviation from what is expected from statistical decay.

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1

Permanent address: SUNY, Stony Brook, NY.

2

Present address: University of Maryland, College Park, MD.

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