A new heavy neutron-rich isotope 238Th

被引：0

作者：

Xu, YB ^{[1
]}

Yuan, SG ^{[1
]}

Yang, WF ^{[1
]}

He, JJ ^{[1
]}

Li, ZW ^{[1
]}

Ma, TT ^{[1
]}

Xiong, B ^{[1
]}

Qin, Z ^{[1
]}

Mou, WT ^{[1
]}

Gan, ZG ^{[1
]}

Shi, LJ ^{[1
]}

Guo, TR ^{[1
]}

Chen, ZT ^{[1
]}

Guo, JS ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

来源：

HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION | 1999年 / 23卷 / 01期

关键词：

multinucleon transfer reaction; chemical separation; new nuclide synthesis and identification;

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

A new nuclide Th-238 has been produced via multinucleon transfer reaction induced by 60MeV/u O-18 ion irradiation of natural uranium. The thorium was radiochemically separated from the mixture of uranium and its reaction products. The activity of thorium was measured by using a HPGe detector and a planar HPGe detector. The Th-238 has been identified for the first time by measuring the growth and decay of the gamma-rays from its daughter Pa-238. The half-life of Th-238 was determined to be (9.4 +/- 2.0)min. In addition, a new (89.0 +/- 0.3)keV gamma-ray with T-1/2 = (8.9 +/- 1.5)min was observed and assigned to Th-238 decay based on the measurement of transition energy and half life.

引用

页码：93 / 95

页数：3

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