Phosphor and method for producing same

A phosphor coated with aluminum oxide, wherein when peak separation is performed on a 1H-NMR spectrum of the phosphor in a range where a 1H chemical shift value is from 0.5 to 11 ppm, a peak 1, a peak 2, and a peak 3 are obtained, wherein the peak 1 is a peak having a peak top at a 1H chemical shift value of 4.0 to 5.5 ppm, the peak 2 is a peak having a peak top at a 1H chemical shift value of 2.0 to 2.8 ppm, and the peak 3 is a peak having a peak top at a 1H chemical shift value of 0.5 to 1.5 ppm, and

• a ratio S2/(S1+S2+S3) is 0.39 or less,
• wherein S1 represents an integral value of the peak 1 in a range where a 1H chemical shift value is from −2 to 12 ppm,
• S2 represents an integral value of the peak 2 in the same range,
• S3 represents an integral value of the peak 3 in the same range, and
• the ratio S2/(S1+S2+S3) is a ratio of S2 to the sum of S1, S2, and S3.