Measurement of γ-ray emission probabilities for 101Mo

101Mo is one of the key nuclides in diagnosing fission burn-up. However, it's difficult to measure its nuclear decay data due to its short half-life. Present study concerns in the measurements of γ-ray emission probabilities, Pγ, of 101Mo and 101Tc using the balance of scheme method and the entire process recording. The Pγ of 101Mo by the entire process recording is about 5% lower than that by using the balance of scheme method. The Pγ of 101Tc using the two methods agree each other very well. So, it seems the γ-ray emission probabilities as well as measurement method still need study further for 101Mo. (authors)