Study of the multi-nucleon transfer reactions of ¹³⁶Xe + ¹⁹⁸Pt for producing exotic heavy nuclei

¹ High Energy Accelerator Research Organization (KEK), 1-1Oho, Tsukuba, Ibaraki 305-0801, Japan
² Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 151-747, Korea
³ Grand Accélérateur National d’Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen Cedex 05, France
⁴ Università di Torino and INFN, Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, Italy
⁵ INFN, Laboratori Nazionali di Legnaro, Viale dell’Università 2, I-35020 Legnaro (Padova), Italy
⁶ Università di Padova and INFN, Sezione di Padova, I–35131, Padova, Italy
⁷ The University of Tokyo, Hongo, Tokyo, 113-0033, Japan
⁸ Institute de Physique Nucléaire, Université Paris-Sud 11, F-91406 Orsay Cedex, France
⁹ Osaka University, Toyonaka, Osaka 560-0043, Japan

^a e-mail: yhkim@post.kek.jp

Published online: 20 March 2014

Abstract

The feasibility of the multi-nucleon transfer (MNT) reaction in the ¹³⁶Xe +¹⁹⁸Pt system was investigated for synthesizing neutron-rich heavy nuclei around mass number A∼200 of astrophysical interest. Identification of the projectile-like fragments (PLF’s) was successfully performed by using VAMOS++ spectrometer. The isotopic distributions of the PLF’s produced by two-proton stripping and pickup reactions were compared with each other, demonstrating the properties of the MNT reactions observed in the present system. The two-proton pickup channels strongly populated than the twoproton stripping channels were observed. The isotopic distributions for different total kinetic energy loss (TKEL) ranges are also discussed. The overall enhancement of the strength of the two-proton pickup compared with the two-proton stripping appears to be related to the MNT reactions with relatively moderate energy dissipation.