Freeze-drying applied to radioactive source preparation

被引：18
|
作者：
de Sanoit, J [1 ]
Leprince, B [1 ]
Bobin, C [1 ]
Bouchard, J [1 ]
机构：
[1] CEA Saclay, CEA BNM Lab Natl Henri Besquerel, F-91191 Gif Sur Yvette, France
来源：
APPLIED RADIATION AND ISOTOPES | 2004年 / 61卷 / 06期
关键词：
freeze-drying; source preparation; radioactivity measurement;
D O I：
10.1016/j.apradiso.2004.04.006
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
In the framework of R&D studies for the improvement of radioactive source efficiencies prepared on thin films for 4pibeta-gamma coincidence counting, a comparative study on two drying methods has been undertaken in our laboratory (BNM-Laboratoire National Henri Becquerel, France). The standard method of evaporation at atmospheric pressure and a method based on freeze-drying using commercial equipment are compared. The preliminary results of this study obtained with Zn-65 sources are presented and a significant improvement of the detection efficiencies to the electron emission for freeze-dried sources is shown. In the course of validation of this method, other radionuclides were studied and, up to now, the results confirm the better crystallization homogeneity achieved for freeze-dried sources. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1391 / 1395
页数：5
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