Eur. Phys. J. A (2018) 54: 107
https://doi.org/10.1140/epja/i2018-12543-1

Regular Article - Experimental Physics

-delayed particle emission from ²¹Mg

¹ Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201800, Shanghai, China
² University of Chinese Academy of Sciences, 100049, Beijing, China
³ ShanghaiTech University, 201203, Shanghai, China
⁴ China Institute of Atomic Energy, 102413, Beijing, China
⁵ Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China

^* e-mail: dqfang@sinap.ac.cn

Received: 14 October 2017
Accepted: 24 May 2018
Published online: 25 June 2018

Abstract

The -delayed particle emission from ²¹Mg was studied at the Radioactive Ion Beam Line in Lanzhou (RIBLL1). Silicon array and high-purity germanium (HPGe) detectors were used to detect the charged particles and -rays emitted from the decay. Half-life time of ²¹Mg was determined to be 121.9(6) ms. New levels (5.639(26) MeV and 6.644(34) MeV) in the nucleus ²¹Na were observed. An improved proton spectrum coincident with -rays at 1.633 MeV was obtained. A new partial decay scheme was constructed based on the present measurement.