scholarly journals Suitability of the microDiamond detector for experimental determination of the anisotropy function of High Dose Rate 192 Ir brachytherapy sources

2020 ◽  
Vol 47 (11) ◽  
pp. 5838-5851
Author(s):  
Giulio Rossi ◽  
Mark Gainey ◽  
Michael Kollefrath ◽  
Elena Hofmann ◽  
Dimos Baltas
Keyword(s):  
Experimental Determination ◽  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
Anisotropy Function

Primary yields and mechanism in the radiolysis of gaseous ammonia

1969 ◽  
Vol 47 (16) ◽  
pp. 3007-3016 ◽  
Author(s):  
C. Willis ◽  
A. W. Boyd ◽  
O. A. Miller
Keyword(s):  
Dose Rate ◽  
Rate Constant ◽  
High Dose Rate ◽  
Radical Reactions ◽  
Gaseous Ammonia ◽  
High Dose ◽  
Ammonia Vapor ◽  
Radical Product ◽  
Very High

Ammonia vapor has been irradiated with single pulses of electrons at a very high dose rate (1027 eV g−1 s−1) with a Febetron 705. At this dose rate radical–product reactions are not significant. In pure ammonia, hydrogen, nitrogen, and hydrazine are produced and the yields found at 1027 eV g−1 s−1 are: G(H2) = 3.58 ± 0.08; G(N2) = 1.00 ± 0.05; G(N2H4) = 0.58 ± 0.05. The yields are independent of pressure from 1 to 5 atm and of temperature between 20 and 200 °C. Above 250 °C the yields of all three products increase significantly and this is due to reaction [1] competing with radical–radical reactions.[Formula: see text]A rate constant for this reaction has been determined,[Formula: see text]Product yields have been measured for ammonia–propene mixtures. These yields have allowed determination of the primary radiation yields GNH = 0.74; [Formula: see text]; GH = 4.8; and G(−NH3) = 5.4.

scholarly journals PO-0769: A microDiamond for determination of absorbed dose around high-dose-rate 192Ir brachytherapy sources

2017 ◽  
Vol 123 ◽  
pp. S407
Author(s):  
V. Kaveckyte ◽  
A. Malusek ◽  
H. Benmaklouf ◽  
G. Alm Carlsson ◽  
A. Carlsson Tedgren
Keyword(s):  
Dose Rate ◽  
Absorbed Dose ◽  
High Dose Rate ◽  
High Dose

Suitability of microDiamond detectors for the determination of absorbed dose to water around high-dose-rate 192 Ir brachytherapy sources

2017 ◽  
Vol 45 (1) ◽  
pp. 429-437 ◽  
Author(s):  
Vaiva Kaveckyte ◽  
Alexandr Malusek ◽  
Hamza Benmakhlouf ◽  
Gudrun Alm Carlsson ◽  
Åsa Carlsson Tedgren
Keyword(s):  
Dose Rate ◽  
Absorbed Dose ◽  
High Dose Rate ◽  
High Dose ◽  
Absorbed Dose To Water

Radiochromic film measurement of anisotropy function for high-dose-rate Ir-192 brachytherapy source

2004 ◽  
Vol 49 (17) ◽  
pp. 4065-4072 ◽  
Author(s):  
S D Sharma ◽  
C Bianchi ◽  
L Conte ◽  
R Novario ◽  
B C Bhatt
Keyword(s):  
Dose Rate ◽  
High Dose Rate ◽  
Radiochromic Film ◽  
High Dose ◽  
Brachytherapy Source ◽  
Anisotropy Function

scholarly journals Identifikasi Uranium dan Thorium di Desa Takandeang Mamuju Sulawesi Barat dengan Menginterpretasikan Data Radiometri Tanah atau Batuan

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Mutia Khairani ◽  
Sutrisno Sutrisno ◽  
Frederikus Dian Indrastomo
Keyword(s):  
Dose Rate ◽  
Ordinary Kriging ◽  
High Dose Rate ◽  
Kriging Interpolation ◽  
High Dose ◽  
Distribution Map ◽  
Probability Curve ◽  
Survey Results ◽  
Curve Method

 Abstrak. Hasil survey dosis radiasi lingkungan menunjukkan di daerah Mamuju memiliki nilai laju dosis radiasi (radioaktivitas) yang cukup tinngi.Nilai radioaktivitas tinggi yang dijumpai pada batuan diperkirakan berasal dari keterdapatan kandungan radioaktif alami seperti unsur uranium (U) dan thorium (Th). Penelitian yang dilakukan bertujuan untuk mendapatkan kesimpulan unsur radioaktif apa yang mempengaruhi nilai laju dosis di daerah tersebut tinggi. Metode penelitian yang diterapkan adalah pengukuran radiometri, penentuan nilai ambang (threshold), menentukan populasi anomali pada unsur radioaktif dari data radiometri dengan menggunakan metode kurva probabilitas, interpolasi kriging dengan metode ordinary kriging dan analisis peta sebaran laju dosis, peta sebaran uranium, dan peta sebaran thorium. geologi daerah penelitian tersusun atas batugamping, batu lava, batuan breksi dan endapan aluvial. Berdasarkan hasil analisis diketahui bahwa nilai laju dosis tinggi mencapai 4.271,3 nSv/h di Desa Takandeang dipengaruhi oleh keterdapatan unsur thorium, dengan kadar 435,7 ppm eTh dan uranium berkadar 426 ppm eU. Abstract. Survey results of environment radiation in Mamuju show that the value of dose rate of radiation (radioactivity) is high enough. That high radioactivity value that is found in rocks is hypothesized to be generated by natural radioactive unsure such as uranium (U) and thorium (Th). The aim of this study is to get conclusion of what radioactive unsure that influences high dose rate in that region. The methods in this study are radiometry measurement, determination of treshold, determination of anomaly population on radioactive unsure from radiometry data using probability curve method, kriging interpolation with ordinary kriging method and analysis of dose rate distribution map, uranium distribution map, and thorium distribution map. The geology of studied region is composed of limestones, lava rocks, breccia rocks, and alluvial sediments. Accroding to the result of analysis, we conclude that the value of high dose rate in Takandeang Village that reaches 4.271,3 nSv/h is influenced by thorium, with level 435,7 ppm eTh and uranium with level 426 ppmeU. 

SU-CC-ValA-08: Air-Kerma Strength Determination of a 169Ytterbium High Dose Rate Brachytherapy Source

2006 ◽  
Vol 33 (6Part2) ◽  
pp. 1984-1984
Author(s):  
J VanDamme ◽  
L DeWerd ◽  
J Micka ◽  
W Culberson ◽  
S Davis
Keyword(s):  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
High Dose Rate Brachytherapy ◽  
Air Kerma ◽  
Strength Determination ◽  
Brachytherapy Source
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