# Structure of 11/2$^-$ analog states in $^{91}$Nb populated by the $^{90}$Zr ($\alpha$,t) reaction

Abstract : Decay via proton emission of isobaric analog states (IAS's) in $^{91}{Nb}$ was studied using the $^{90}{Zr}(\alpha,t)$ reaction at $E_\alpha$=180 MeV. This study provides information about the damping mechanism of these states. Decay to the ground state and low-lying phonon states in $^{90}{Zr}$ was observed. The experimental data are compared with theoretical predictions wherein the IAS `single-particle' proton escape widths are calculated in a continuum RPA approach. The branching ratios for decay to the phonon states are explained using a simple model.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00009799
Contributor : Suzanne Robert <>
Submitted on : Wednesday, May 9, 2001 - 2:48:13 PM
Last modification on : Wednesday, September 16, 2020 - 4:01:26 PM

### Identifiers

• HAL Id : in2p3-00009799, version 1

### Citation

H.K.T. van der Molen, H. Akimune, A.M. van den Berg, I. Daito, H. Fujimura, et al.. Structure of 11/2$^-$ analog states in $^{91}$Nb populated by the $^{90}$Zr ($\alpha$,t) reaction. Physics Letters B, Elsevier, 2001, 502, pp.1-8. ⟨in2p3-00009799⟩

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