Please note: This is version 1.2 of DRAC and is currently under development.

DRAC — Data Tables

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A list of the different data sets available for use in DRAC:

1. Radionuclide conversion factors: View, Download CSV
2. Grain size attenuation factors for alpha dose rates: View, Download CSV
3. Grain size attenuation factors for beta dose rates: View, Download CSV
4. Etch depth attenuation factors: View, Download CSV
5. Water content attenuation factors: View, Download CSV
6. F, J and H parameters used for cosmic dose rate calculation: View, Download CSV
7. Gamma dose scaling: View, Download CSV

4) Etch depth attenuation factors

Bell1980 Alpha
Etch depth (μm)	U φ(D)	U 1-φ(D)	Th φ(D)	Th 1-φ(D)	Combined φ(D)	Combined 1-φ(D)
0	1	1	1	1	1	1
1	1.027	0.902	1.025	0.924	1.026	0.912
2	1.052	0.81	1.049	0.85	1.051	0.83
3	1.074	0.73	1.073	0.779	1.073	0.754
4	1.093	0.66	1.095	0.712	1.094	0.685
5	1.111	0.595	1.116	0.649	1.113	0.621
6	1.129	0.53	1.135	0.589	1.132	0.559
7	1.147	0.463	1.154	0.534	1.15	0.498
8	1.164	0.4	1.171	0.482	1.167	0.44
9	1.179	0.347	1.187	0.433	1.183	0.389
10	1.192	0.3	1.202	0.387	1.197	0.343
11	1.204	0.254	1.216	0.343	1.21	0.298
12	1.216	0.21	1.23	0.302	1.223	0.255
13	1.227	0.173	1.243	0.265	1.234	0.218
14	1.236	0.14	1.254	0.23	1.245	0.184
15	1.244	0.111	1.265	0.198	1.254	0.153
16	1.251	0.085	1.275	0.167	1.263	0.125
17	1.257	0.063	1.284	0.139	1.27	0.1
18	1.262	0.045	1.293	0.112	1.277	0.078
19	1.266	0.03	1.301	0.089	1.283	0.059
20	1.268	0.02	1.307	0.07	1.287	0.044
21	1.27	0.014	1.312	0.054	1.291	0.033
22	1.271	0.01	1.317	0.04	1.293	0.025
23	1.273	0.004	1.32	0.029	1.296	0.017
24	1.274	0	1.323	0.02	1.298	0.01
25	1.274	0	1.325	0.014	1.299	0.007
26	1.274	0	1.327	0.009	1.3	0.004
27	1.274	0	1.328	0.005	1.3	0.002
28	1.274	0	1.329	0.001	1.301	0.001
29	1.274	-0	1.33	-0	1.301	-0
30	1.274	0	1.33	0	1.302	0
Bell1979 Beta
Etch depth (μm)	U φ(D)	U 1-φ(D)	Th φ(D)	Th 1-φ(D)	K φ(D)	K 1-φ(D)	Combined φ(D)	Combined 1-φ(D)
0	1	1	1	1	1	1	1	1
1	1.072	0.991	1.025	0.99	1	1	0.585	0.995
2	1.142	0.982	1.065	0.98	1	1	0.616	0.99
3	1.206	0.974	1.104	0.97	1	1	0.645	0.985
4	1.266	0.967	1.143	0.961	1	1	0.672	0.981
5	1.321	0.96	1.181	0.952	1	1	0.698	0.977
6	1.371	0.954	1.218	0.944	1	1	0.722	0.973
7	1.418	0.948	1.253	0.936	1	1	0.745	0.969
8	1.46	0.943	1.288	0.929	1	1	0.766	0.966
9	1.498	0.939	1.323	0.922	1	1	0.786	0.963
10	1.533	0.934	1.356	0.915	1	1	0.804	0.96
11	1.564	0.931	1.388	0.909	1	1	0.821	0.957
12	1.593	0.927	1.42	0.902	1	1	0.838	0.955
13	1.618	0.924	1.451	0.897	1	1	0.852	0.953
14	1.64	0.922	1.481	0.891	1	1	0.866	0.951
15	1.661	0.92	1.51	0.886	1	1	0.879	0.949
16	1.678	0.918	1.538	0.881	1	1	0.892	0.947
17	1.694	0.916	1.566	0.877	1	1	0.903	0.945
18	1.709	0.914	1.593	0.872	1	1	0.913	0.944
19	1.721	0.913	1.619	0.868	1	1	0.923	0.943
20	1.733	0.912	1.644	0.864	1	1	0.933	0.941
21	1.743	0.911	1.668	0.861	1	1	0.942	0.94
22	1.753	0.91	1.692	0.857	1	1	0.95	0.939
23	1.762	0.909	1.715	0.854	1	1	0.958	0.938
24	1.77	0.908	1.737	0.851	1	1	0.966	0.937
25	1.779	0.908	1.759	0.848	1	1	0.974	0.936
26	1.787	0.907	1.779	0.845	1	1	0.981	0.935
27	1.795	0.906	1.799	0.843	1	1	0.988	0.935
28	1.804	0.906	1.819	0.84	1	1	0.995	0.934
29	1.813	0.905	1.837	0.838	1	1	1.002	0.933
30	1.822	0.904	1.855	0.836	1	1	1.009	0.932
Brennan2003 Beta
Etch depth (μm)	U φ(D)	U 1-φ(D)	Th φ(D)	Th 1-φ(D)	K φ(D)	K 1-φ(D)	Combined φ(D)	Combined 1-φ(D)
0	1	1	1	1	1	1	1	1
1	1.011	0.999	1.01	0.998	1.01	0.999	1.01	0.999
2	1.021	0.998	1.02	0.997	1.019	0.999	1.02	0.998
3	1.03	0.997	1.03	0.996	1.027	0.999	1.029	0.997
4	1.039	0.996	1.039	0.994	1.035	0.999	1.037	0.997
5	1.047	0.995	1.047	0.993	1.043	0.998	1.045	0.996
6	1.055	0.994	1.055	0.992	1.051	0.998	1.053	0.995
7	1.062	0.993	1.062	0.99	1.059	0.998	1.061	0.995
8	1.068	0.993	1.07	0.989	1.066	0.998	1.068	0.994
9	1.075	0.992	1.077	0.988	1.074	0.997	1.075	0.994
10	1.081	0.991	1.083	0.987	1.081	0.997	1.081	0.993
11	1.087	0.99	1.089	0.986	1.088	0.997	1.088	0.992
12	1.093	0.99	1.095	0.985	1.094	0.997	1.094	0.992
13	1.098	0.989	1.101	0.984	1.101	0.996	1.1	0.991
14	1.103	0.989	1.107	0.983	1.107	0.996	1.106	0.991
15	1.108	0.988	1.112	0.983	1.113	0.996	1.111	0.99
16	1.113	0.988	1.117	0.982	1.119	0.996	1.117	0.99
17	1.118	0.987	1.122	0.981	1.125	0.995	1.122	0.99
18	1.122	0.987	1.127	0.98	1.131	0.995	1.127	0.989
19	1.127	0.986	1.131	0.98	1.137	0.995	1.132	0.989
20	1.131	0.986	1.136	0.979	1.142	0.995	1.137	0.988
21	1.135	0.985	1.14	0.978	1.148	0.995	1.142	0.988
22	1.139	0.985	1.145	0.978	1.153	0.994	1.147	0.988
23	1.143	0.985	1.149	0.977	1.158	0.994	1.151	0.987
24	1.147	0.984	1.153	0.976	1.163	0.994	1.156	0.987
25	1.15	0.984	1.157	0.976	1.168	0.994	1.16	0.987
26	1.154	0.983	1.161	0.975	1.173	0.994	1.164	0.986
27	1.157	0.983	1.164	0.975	1.178	0.993	1.169	0.986
28	1.161	0.983	1.168	0.974	1.183	0.993	1.173	0.986
29	1.164	0.982	1.172	0.973	1.187	0.993	1.176	0.985
30	1.167	0.982	1.175	0.973	1.192	0.993	1.18	0.985

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Full references for each of the datasets can be accessed via the References page.

We invite authors who calculate new and/or updated datasets for dose rate calculation to submit their datasets for use in DRAC. If you are interested, please contact us.