Eur. Phys. J. A (2005) 25: 409-413
https://doi.org/10.1140/epjad/i2005-06-094-0

ENAM 2004

Reduced transition probabilities for the first 2⁺ excited state in ⁴⁶Cr, ⁵⁰Fe, and ⁵⁴Ni

¹ RIKEN, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
² Center for Nuclear Study (CNS), University of Tokyo, RIKEN Campus, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
³ Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, 171-8501, Toshima, Tokyo, Japan
⁴ Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, H-4001, Debrecen, Hungary
⁵ Institut de Physique Nucléare, F-91406, Orsay Cedex, France
⁶ Department of Physics, University of Tokyo, 7-3-1 Hongo, 113-0033, Bunkyo, Tokyo, Japan
⁷ High Energy Accelerator Research Organization, 1-1 Oho, 305-0801, Tsukuba, Ibaraki, Japan
⁸ Argonne National Laboratory, 9700 S. Cass Avenue, 60439, Argonne, IL, USA
⁹ Department of Physics, Kyoto University, Kita-Shirakawa-Oiwake, 606-8502, Sakyo, Kyoto, Japan
¹⁰ Department of Physics, University of Tsukuba, 1-1-1 Tennoudai, 305-8577, Tsukuba, Ibaraki, Japan
¹¹ National Superconducting Cyclotron Laboratory, Michigan State University, 48824-1321, East Lansing, MI, USA

^* e-mail: nari-yamada@riken.jp

Received: 22 December 2004
Accepted: 1 March 2005
Published online: 27 May 2005

Abstract

We measured B(E2;0⁺ _g.s. → 2⁺ ₁) values for the proton-rich ⁴⁶Cr, ⁵⁰Fe, and ⁵⁴Ni nuclides by intermediate-energy Coulomb excitation in order to study the systematic behavior of collectivity in the Z = 20-28 region. The present study completes the B(E2) values for the T _z = ±1 even-even pair nuclei up to Z = 28. The double ratios of proton and neutron matrix elements, (| M _n|/| M _p|)/(N/Z), have been extracted from the B(E2) values combining with the ones of their mirror nuclei, and compared with theoretical predictions.