I did an experiment on the scattered PHOT by QRTZ.

First, we surround CLNE with a circular wall made of COAL as a PHOT source.
(COAL does not pass through the PHOT.)
Next, as a launch port for PHOT, we place a 1 dot gap in the upward direction and a 1 dot QRTZ at the outermost side of the gap.
We measure the direction of the PHOT scattered by this QRTZ.
To do this, we need a sensor that can detect PHOT in the direction it will arrive.
Then, we set the c-type as PHOT, and make a sensor by arranging DETC horizontally at 2-dot intervals like a row of dots, and extending METL over each DETC.
(Install the COAL in the gap between the sensor and the sensor.)
The PSCN is placed at the tip of the METL, and the information that the PHOT collided is stored by activating the LCRY.

Let m be an integer scale value, the equation tan(s) = 3m/d holds, where d the distance between the sensor and the QRTZ in the direction directly above (0 degree), s is the scattering angle.
(The sensors are placed at 2-dot intervals, so every time you count one sensor, you count 3 dots in the horizontal direction. 3 dots in the horizontal direction.)

In this case, the experiment was performed with d = 93 dots, the following values of m were obtained:
4, 56, 58, 64, 67, 70, 74, 78, 79, 82, 83, 86, 87, 88, 93, 97, 98, 99.
(Since both positive and negative values were obtained symmetrically, they are expressed in absolute values.)
Substituting this into tan(s) = 3m/d to obtain s, and using the arc degree to obtain the scattering angle, we obtain
7.4, 61.0 ,61.9, 64.2, 65.2, 66.1, 67.3,68.3, 68.6, 69.3, 69.5, 70.2, 70.4, 70.6, 71.6, 72.3, 72.4, 72.6.

From the results of this measurement, it can be said that the scattering of PHOT by QRTZ is not random, but symmetric in a certain direction.