115 In as a probe for the characterization of therapy bremsstrahlung beams and the detection of photoneutrons
Variation of the photoactivation rate across radiation fields of three different bremsstrahlung beams of two medical accelerators has been measured, making use of the photonuclear reactions in natural indium probes: 115 In (γ,γ ′ ) 115m In and 115 In (γ,n) 114m In . The third nuclear reaction, 115 I...
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| Veröffentlicht in: | Medical physics (Lancaster) 1999-04, Vol.26 (4), p.564-569 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Variation of the photoactivation rate across radiation fields of three different bremsstrahlung beams of two medical accelerators has been measured, making use of the photonuclear reactions in natural indium probes:
115
In
(γ,γ
′
)
115m
In
and
115
In
(γ,n)
114m
In
.
The third nuclear reaction,
115
In
(n,γ)
116m
In
,
was used to detect the presence of neutrons in the photon beam and to estimate the spatial distribution of thermal and fast neutrons in the patient plane as a function of collimator opening. |
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| ISSN: | 0094-2405 2473-4209 |
| DOI: | 10.1118/1.598558 |