Exclusive decay study of the 16.62 MeV (2−, T = 1) resonance in 12C - INSPIRE

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Exclusive decay study of the 16.62 MeV (2−, T = 1) resonance in 12C

Sep 16, 2021

5 pages

Published in:

Phys.Lett.B 825 (2022) 136857

Published: Feb 10, 2022

e-Print:

2109.07886 [nucl-ex]

DOI:

10.1016/j.physletb.2021.136857 (publication)

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Abstract: (Elsevier B.V.)

The 3α decay of the 16.62 MeV (

2^{-}

,

T = 1

) resonance in ¹²C has been studied for nearly a century starting with one of the first nuclear reaction studies at the Cavendish Laboratory in the 1930s. In the hitherto latest study published a decade ago a model based on earlier work from the 1960s was found to give a good account of a set of inclusive data. This model describes the decay as an l=3 α-particle populating the

2^{+}

state of ⁸Be. Here we provide new exclusive data on the 3α decay of the 16.62 MeV resonance, and demonstrate that the decay is best described by a model with predominantly

l = 1

emission with an admixture of l=3.

Note:

5 pages, 3 figures

Collective levels
Breakup and momentum distributions
Multifragment emission and correlations

References(27)

Figures(2)

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