Abstract.
It is reported that the width of the first excited state ( \( {\frac{{7^+}}{{2}}}\) , 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.
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Cheon, IT. The modified decay width of the radioactive nucleus. Eur. Phys. J. A 33, 213–221 (2007). https://doi.org/10.1140/epja/i2006-10445-5
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DOI: https://doi.org/10.1140/epja/i2006-10445-5