Regular Article - Theoretical Physics
The modified decay width of the radioactive nucleus
The Korean Academy of Science and Technology, 7-1 Gumi-dong, 463-808, Bundang-gu, Seongnam-shi, Gyunggi-do, Korea
Accepted: 18 July 2007
Published online: 9 August 2007
It is reported that the width of the first excited state ( , 37.133keV) of 121 51Sb embedded in a ZnSb alloy can be modified by reabsorption of γ -rays scattered backward on the platinum (gold) reflector. Its dependence on the reflector shape is also investigated. The decay rate is reduced about 4.5% at a temperature of 4.2K by a platinum spherical reflector of 5mm radius.
PACS: 21.10.Tg Lifetimes – / 23.20.Lv γ transitions and level energies – / 25.20.Dc Photon absorption and scattering – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2007