Table S1 Mass attenuation coefficient (MAC) of the all studied samples as obtained from Geant4 simulations and XCOM program at different photons energies. The selected energy values are emitted from 152Eu.
 Photon Energy
 (MeV)   	2CHA	3CHA	4CHA	
	XCOM	Geant4	Dev.%	XCOM	Geant4	Dev.%	XCOM	Geant4	Dev.%	
0.1228	0.17623	0.17420	1.15	0.17698	0.17600	0.55	0.17747	0.17522	1.27	
0.2447	0.11957	0.11907	0.42	0.11973	0.11805	1.40	0.11983	0.11903	0.67	
0.2959	0.11011	0.10945	0.60	0.11022	0.10917	0.96	0.1103	0.10883	1.33	
0.3443	0.10322	0.10193	1.25	0.10332	0.10206	1.22	0.10338	0.10240	0.95	
0.4111	0.09571	0.09447	1.29	0.09579	0.09453	1.32	0.09584	0.09458	1.32	
0.444	0.09261	0.09177	0.91	0.09268	0.09157	1.20	0.09273	0.09214	0.64	
0.678	0.07675	0.07625	0.65	0.0768	0.07604	0.98	0.07684	0.07619	0.85	
1.005	0.06365	0.06316	0.78	0.06369	0.06295	1.16	0.06372	0.06319	0.83	
1.086	0.06125	0.06050	1.23	0.06129	0.06072	0.93	0.06132	0.06107	0.40	
1.112	0.06053	0.05977	1.25	0.06057	0.06000	0.93	0.06059	0.05977	1.35	
1.299	0.05593	0.05539	0.97	0.05597	0.05522	1.34	0.05599	0.05580	0.34	
1.458	0.05273	0.05211	1.18	0.05277	0.05216	1.16	0.05279	0.05253	0.50	
0.1228	0.17623	0.17420	1.15	0.17698	0.17600	0.55	0.17747	0.17522	1.27	
0.2447	0.11957	0.11907	0.42	0.11973	0.11805	1.40	0.11983	0.11903	0.67	
0.2959	0.11011	0.10945	0.60	0.11022	0.10917	0.96	0.1103	0.10883	1.33	
0.3443	0.10322	0.10193	1.25	0.10332	0.10206	1.22	0.10338	0.10240	0.95	
0.4111	0.0957	0.09447	1.29	0.09579	0.09453	1.32	0.09584	0.09458	1.32	

Table S2: The calculated probability P(E) of the studied samples for different scattering processes. The table shows the energy range used for each scattering process. CS: Coherent Scattering, PA: Photoelectric Adsorption and PP: Pair production process.
Sample code	P(E)
P(CS)  P(PA)  P(PP)	P(E)
P(CS)  P(PA)  P(PP)	P(E)
P(CS)  P(PA)   P(PP)	
Energy range (MeV)	0.015<E<0.200	0.3<E<1.25	1.5<E<15	
HA	18.7      82.3         0	67.4      30.3      2.3	1.7        0.7         97.6	
0.5CHA	18.3      81.7         0	66.6      31.1      2.3	2.4       1.0          96.6	
1CHA	18 .0     82.0         0	66.1      31.6      2.3	2.4       1.0          96.7	
2CHA	17.7     82.3          0	65.7      32.0      2.3	2.4       1.1          96.5	
3CHA	17.6     82.4          0	65.5      32.3      2.2	2.1       6.5          91.4	
4CHA	17.5    82.5           0	65.3     30.5       2.2	2.4       1.1          96.5