| 摘要 |
A calculation unit (40) obtains the volume magnetic susceptibility of a first particle. Also, the calculation unit (40) obtains the volume magnetic susceptibility of a second particle different from the first particle. Thereafter, the calculation unit (40) obtains a volume occupied by a surface material included in the second particle on the basis of a relationship between the volume magnetic susceptibility of the first particle, the volume of the first particle, the volume magnetic susceptibility of the second particle, the volume of the second particle, the volume occupied by the surface material, and the volume magnetic susceptibility of the surface material. |
