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Theoretical modeling of yields for proton-induced reactions on natural and enriched molybdenum targets.

Abstract：

:Recent acute shortage of medical radioisotopes prompted investigations into alternative methods of production and the use of a cyclotron and ¹⁰⁰Mo(p,2n)(99m)Tc reaction has been considered. In this context, the production yields of (99m)Tc and various other radioactive and stable isotopes which will be created in the process have to be investigated, as these may affect the diagnostic outcome and radiation dosimetry in human studies. Reaction conditions (beam and target characteristics, and irradiation and cooling times) need to be optimized in order to maximize the amount of (99m)Tc and minimize impurities. Although ultimately careful experimental verification of these conditions must be performed, theoretical calculations can provide the initial guidance allowing for extensive investigations at little cost. We report the results of theoretically determined reaction yields for (99m)Tc and other radioactive isotopes created when natural and enriched molybdenum targets are irradiated by protons. The cross-section calculations were performed using a computer program EMPIRE for the proton energy range 6-30 MeV. A computer graphical user interface for automatic calculation of production yields taking into account various reaction channels leading to the same final product has been created. The proposed approach allows us to theoretically estimate the amount of (99m)Tc and its ratio relative to (99g)Tc and other radioisotopes which must be considered reaction contaminants, potentially contributing to additional patient dose in diagnostic studies.

journal_name

Phys Med Biol

journal_title

Physics in medicine and biology

authors

Celler A,Hou X,Bénard F,Ruth T

doi

10.1088/0031-9155/56/17/002

subject

Has Abstract

pub_date

2011-09-07 00:00:00

pages

5469-84

issue

17

eissn

0031-9155

issn

1361-6560

pii

S0031-9155(11)94386-3

journal_volume

56

pub_type

杂志文章

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