Advanced Physics for Brachytherapy 2018

TLD: intrinsic energy dependence

D

Q TLD

)0( )0( QMQ TLDD QM ) ( ) (

k

QQ rel

)0 , ( =

1

bq

rel

k

bq

• In the light of studies indicating =1 within experimental uncertainties (i.e. Das et al 1996) k bq was disregarded by most experimentalists rel bq k

Figure from: Nunn et al, Med. Phys. 38(8) 1859 (2008)

• Until Davis et al (2003) measured TLD100 over-response at low E due to LET increase and the race to determine k bq was on …!

Figure from: Davis et al, Radiation Protection Dosimetry Vol. 106, No. 1, pp. 33–43 (2003)