新丰中子同位素:~(186)Hf

Abstract

在兰州重离子加速器（ＦＤＵＬ）上，用６０ＭｅＶ／μ１８Ｏ离子轰击厚天然钨靶，通过多核子转移反应产生１８６Ｈｆ。使用放射化学分离技术从钨和反应产物混和物中分离出铪，并由ＨＰＧｅ探测器测量铪样品的活性．观测到了１８６Ｈｆ的子体１８６Ｔａ的７３７，５ｋｅＶＹ射线的增长、衰变行为，结果表明，本实验首次合成并鉴别了新丰中子同位素１８６Ｈｆ，测得它的半衰期为（２．６±１．２）ｍｉｎ。The radioactive nuclide 186Hf has been produced via multinucleon transfer reaction by 60 MeV / u 18 O ion irradiation of the natural tungsten. The radiochemical separation was performed to isolate the hafnium from tungsten and the complex mixture of the reaction products. The activity of the hafnium was measured using a HPGe detector The new neutron-rich isotope 186Hf has been identified for the first time by measuring the growth and decay of the 737.5keV - ray from its daughter 186Ta. The half-life of186H...国家自然科学基金,中国科学院资