Study of the $^{90}$Zr($\vec{p},\alpha$)$^{87}$Y reaction at 22 MeV

P. Guazzoni; M. Jaskola; L. Zetta; J.N. Gu; A. Vitturi; G. Graw; R. Hertenberger; P. Schiemenz; B. Valnion; U. Atzrott; G. Staudt

doi:doi:10.1007/s100500050071

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A 1, 365-378

Study of the ⁹⁰Zr( $\vec{p},\alpha$ )⁸⁷Y reaction at 22 MeV

P. Guazzoni¹ - M. Jaskola¹ - L. Zetta¹ - J.N. Gu² - A. Vitturi² - G. Graw³ - R. Hertenberger³ - P. Schiemenz³ - B. Valnion³ - U. Atzrott⁴ - G. Staudt⁴

¹ Dipartimento di Fisica dell'Università and Istituto Nazionale di Fisica Nucleare, via Celoria 16, I-20133 Milano, Italy
² Dipartimento di Fisica dell'Università and Istituto Nazionale di Fisica Nucleare, via Marzolo 8, I-35100 Padova, Italy
⁵ Sektion Physik der Universität München, D-85748 Garching, Germany
⁶ Physikalisches Institut der Universität, Auf der Morgenstelle 14, D-72076 Tübingen, Germany

Received: 17 November 1997 Communicated by D. Schwalm

Abstract
The ( $\vec{p},\alpha$ ) reaction on ⁹⁰Zr has been studied in a high resolution experiment at an incident proton energy of 22 MeV. The cross section and asymmetry angular distributions for transitions to 36 levels of ⁸⁷Y with an excitation energy up to 3 MeV have been measured. DWBA analyses of experimental angular distributions, using either Woods-Saxon or Double Folded potentials for the exit channel, have been done, allowing either the confirmation of previous spin and parity values or the assignment of new spin and parity to a large number of states. The structure of low lying states of ⁸⁷Y has been studied in the framework of the shell model, using the OXBASH code. With the interaction PMM90 reasonable agreement is obtained for part of the negative parity spectrum.

PACS
21.60.Fw Models based on group theory - 21.60.Ev Collective models - 27.60.+j $90 \le A \le 149$ - 25.40.Hs Transfer reactions - 21.60.Cs Shell model