• Citer

Unexpected transparency in low energy 90Zr(α,α0) scattering and α-cluster structure in 94Mo

par Michel, Francis;Reidemeister, Guy ;Ohkubo, Shigeo
Référence Physical review. C. Nuclear physics, 61, 4, page (416011-416015)
Publication Publié, 2000-04

Article révisé par les pairs

• Détails
• Contenu

Résumé :

We show that incomplete absorption in 90Zr(α,α0) scattering is responsible for the spectacular dip observed in the backward excitation function at low energy (Eα≃ 25 MeV), which we interpret as a destructive interference effect between the barrier and internal wave contributions to the scattering amplitude. Because of this transparency, an optical potential, which is in line with the higher energy data, can be extracted with good accuracy. The real part of this potential is found to support several rotational bands; the properties of the states of the first Pauli-allowed band, with N = 16, in particular the electromagnetic transition rates between the first states, are in good agreement with those of the states of the experimental 94Mo ground state band, suggesting that α-cluster structure is still an important feature in the A = 90 region.