Table:
α valuesof SF	α valuesof foci 24 h	RBE(SF 0.1)	RBE(foci 24 h)
220 kV X-rays LDR, reference	0.12	0.84	1.00	1.00
220 kV X-rays HDR	0.24	1.87	0.58	2.22
<En > = 5.8 MeV neutrons LDR	0.43	4.43	2.06	5.25
<En > = 5.8 MeV neutrons HDR	0.65	3.86	1.99	4.57
1.2 MeV monoenergetic neutrons	1.91	3.36	3.75	3.98
0.56 MeV monoenergetic neutrons	2.55	6.71	4.97	7.95
mixed gamma – secondary neutron (<En > = 70.5 MeV) field	1.03	3.77	2.09	4.47

Transform the table into Markdown format.

|  | α valuesof SF | α valuesof foci 24 h | RBE(SF 0.1) | RBE(foci 24 h) | 
 | --- | --- | --- | --- | --- | 
 | 220 kV X-rays LDR, reference | 0.12 | 0.84 | 1.00 | 1.00 | 
 | 220 kV X-rays HDR | 0.24 | 1.87 | 0.58 | 2.22 | 
 | <En > = 5.8 MeV neutrons LDR | 0.43 | 4.43 | 2.06 | 5.25 | 
 | <En > = 5.8 MeV neutrons HDR | 0.65 | 3.86 | 1.99 | 4.57 | 
 | 1.2 MeV monoenergetic neutrons | 1.91 | 3.36 | 3.75 | 3.98 | 
 | 0.56 MeV monoenergetic neutrons | 2.55 | 6.71 | 4.97 | 7.95 | 
 | mixed gamma – secondary neutron (<En > = 70.5 MeV) field | 1.03 | 3.77 | 2.09 | 4.47 |