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**Harvard**

Holmgren, S., Tovedal, A., Bjornham, O. och Ramebäck, H. (2016) *Time optimization of Sr-90 measurements: Sequential measurement of multiple samples during ingrowth of Y-90*.

** BibTeX **

@article{

Holmgren2016,

author={Holmgren, S. and Tovedal, A. and Bjornham, O. and Ramebäck, Henrik},

title={Time optimization of Sr-90 measurements: Sequential measurement of multiple samples during ingrowth of Y-90},

journal={Applied Radiation and Isotopes},

issn={0969-8043},

volume={110},

pages={150-154},

abstract={The aim of this paper is to contribute to a more rapid determination of a series of samples containing Sr-90 by making the Cherenkov measurement of the daughter nuclide Y-90 more time efficient. There are many instances when an optimization of the measurement method might be favorable, such as; situations requiring rapid results in order to make urgent decisions or, on the other hand, to maximize the throughput of samples in a limited available time span. In order to minimize the total analysis time, a mathematical model was developed which calculates the time of ingrowth as well as individual measurement times for n samples in a series. This work is focused on the measurement of Y-90 during ingrowth, after an initial chemical separation of strontium, in which it is assumed that no other radioactive strontium isotopes are present. By using a fixed minimum detectable activity (MDA) and iterating the measurement time for each consecutive sample the total analysis time will be less, compared to using the same measurement time for all samples. It was found that by optimization, the total analysis time for 10 samples can be decreased greatly, from 21 h to 6.5 h, when assuming a MDA of 1 Bq/L and at a background count rate of approximately 0.8 cpm.},

year={2016},

keywords={Sr-90, Y-90, Optimization, Sequential measurement, Multiple samples},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 235049

A1 Holmgren, S.

A1 Tovedal, A.

A1 Bjornham, O.

A1 Ramebäck, Henrik

T1 Time optimization of Sr-90 measurements: Sequential measurement of multiple samples during ingrowth of Y-90

YR 2016

JF Applied Radiation and Isotopes

SN 0969-8043

VO 110

SP 150

OP 154

AB The aim of this paper is to contribute to a more rapid determination of a series of samples containing Sr-90 by making the Cherenkov measurement of the daughter nuclide Y-90 more time efficient. There are many instances when an optimization of the measurement method might be favorable, such as; situations requiring rapid results in order to make urgent decisions or, on the other hand, to maximize the throughput of samples in a limited available time span. In order to minimize the total analysis time, a mathematical model was developed which calculates the time of ingrowth as well as individual measurement times for n samples in a series. This work is focused on the measurement of Y-90 during ingrowth, after an initial chemical separation of strontium, in which it is assumed that no other radioactive strontium isotopes are present. By using a fixed minimum detectable activity (MDA) and iterating the measurement time for each consecutive sample the total analysis time will be less, compared to using the same measurement time for all samples. It was found that by optimization, the total analysis time for 10 samples can be decreased greatly, from 21 h to 6.5 h, when assuming a MDA of 1 Bq/L and at a background count rate of approximately 0.8 cpm.

LA eng

DO 10.1016/j.apradiso.2016.01.011

LK http://dx.doi.org/10.1016/j.apradiso.2016.01.011

OL 30