Eur. Phys. J. A (2006) 27: 321-324
https://doi.org/10.1140/epja/i2006-08-049-x

Nuclear Physics in Astrophysics II

Testing of the RIKEN-ATOMKI CsI(Tl) array in the study of ^{22, 23}O nuclear structure

¹ Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, H-4001, Debrecen, Hungary
² The Institute of Physical and Chemical Research, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
³ Institut de Physique Nucléaire, 15 rue Georges Clemenceau, 91406, Orsay, France
⁴ Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, 152-8550, Tokyo, Japan
⁵ Tohoku University, 980-8578, Sendai, Miyagi, Japan
⁶ University of Tokyo, 113-0033, Tokyo, Japan
⁷ Kurchatov Institute, Kurchatov sq. 1, 123182, Moscow, Russia
⁸ Rikkyo University, 3-34-1 Nishi-Ikebukuro, 171-8501, Toshima, Tokyo, Japan
⁹ Kyoto University, 606-8501, Kyoto, Japan

^* e-mail: elekes@atomki.hu

Received: 27 July 2005
Accepted: 20 December 2005
Published online: 15 March 2006

Abstract

The paper reports on the test of the newly developed RIKEN-ATOMKI CsI(Tl) array. It is demonstrated that high-quality detectors with excellent light collection efficiency and narrow resolution distribution could be produced. The setup has been commissioned in the study of the reaction of ²²O + CD₂. In the present paper, we summarize the results mainly on the (d, d ^′) channel. From the cross section for the transition between the ground state and the first 2⁺ state, we could deduce the “matter” deformation parameter to be β_M = 0.23±0.02 by distorted wave analysis. Comparing this data with previous measurements it can be concluded that ²²O isotope has moderate and similar neutron and proton deformations.