Elsevier

Physics Letters B

Volume 649, Issue 1, 24 May 2007, Pages 35-42
Physics Letters B

Experimental determination of the Jπ components of the spin-dipole resonance in 12B

https://doi.org/10.1016/j.physletb.2007.03.031Get rights and content
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Abstract

The inclusive C12(d,He2) and exclusive C12(d,He2+n) reactions have been studied with a beam energy of 171 MeV and scattering angles for the (d,He2) reaction θ=0° and 3°. The studies focused on the separation of the isovector spin-dipole resonance (IVSGDR) into its components by measuring tensor-analysing powers and observing the direct neutron decay to the low-lying proton-hole states in 11B. Merging the information obtained from both measurements resulted in the first-time verification of model-independent predictions of tensor-analysing powers at extreme forward angles and the experimental decomposition of the IVSGDR into its Jπ components. The experimental results are in reasonable agreement with theoretical estimates based on shell-model calculations.

PACS

26.50.+x
25.45.Kk
27.40.+z
25.45.-z

Cited by (0)

1

Present address: Contrinex SA, route André Piller 50, 1762 Givisiez, Switzerland.

2

Robert Bosch GmbH, D-71229 Leonberg, Germany.

3

Present address: SCK⋅CEN, Boeretang 200, 2400 Mol, Belgium.

4

Present address: Institute of Nuclear Research of the Hungarian Academy of Sciences, 4001 Debrecen, Hungary.