A radium assay technique using hydrous titanium oxide adsorbent for the Sudbury Neutrino Observatory

被引：38

作者：

Andersen, TC

Black, RA

Blevis, I

Boger, J

Bonvin, E

Chen, M

Cleveland, BT

Dai, X

Dalnoki-Veress, F

Doucas, G

Farine, J

Fergani, H

Fowler, MM

Hahn, RL

Hallman, ED

Hargrove, CK

Heron, H

Hooper, E

Howard, KH

Jagam, P

Jelley, NA

Knox, AB

Lee, HW

Levine, I

Locke, W

Majerus, S

McFarlane, K

McGregor, G

Miller, GG

Moorhead, M

Noble, AJ

Omori, M

Rowley, JK

Shatkay, M

Shewchuk, C

Simpson, JJ

Sinclair, D

Tanner, NW

Taplin, RK

Trent, PT

Wang, JX

Wilhelmy, JB

Yeh, M

机构：

[1] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[2] Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada

[3] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[4] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[5] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[6] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[7] Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2003年 / 501卷 / 2-3期

基金：

加拿大自然科学与工程研究理事会;

关键词：

radioactivity assay; water purification; solar neutrino; SNO;

D O I：

10.1016/S0168-9002(02)01925-3

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

As photodisintegration of deuterons mimics the disintegration of deuterons by neutrinos, the accurate measurement of the radioactivity from thorium and uranium decay chains in the heavy water in the Sudbury Neutrino Observatory (SNO) is essential for the determination of the total solar neutrino flux. A radium assay technique of the required sensitivity is described that uses hydrous titanium oxide adsorbent on a filtration membrane together with beta - alpha delayed coincidence counting system. For a 200 tonne assay the detection limit for Th-232 is a concentration of similar to3 x 10(-16) g Th/g water and for U-238 of similar to3 x 10(-16) g U/g water. Results of assays of both the heavy and light water carried out during the first 2 years of data collection of SNO are presented. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：386 / 398

页数：13

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