The nucleation of the uncontaminated atmosphere . f tRtuLdco & D--0 ,20 40 60 80 W0 U0 1G0 180 2MFigs. 88-90.—Illustrating table 56. PENETRATION OF GAMMA RAYS. 89 Table 56.—Penetration of radium radiation. Cylindrical glass fog chamber withoutcasket. 5j> = 22 cm. Lead tube, 30 cm. or 60 cm. long. Walls, cm. thick. Part. Remarks. Dis-tance. Si. sz- ?S3. MX10-* ^Xio-3 N3Xio-° I. 0 3-4 3-o 3-7 3-7 Radium in 1 Pb tube, capped- 0 Radium in 1 Pb tube, cap 0 3-7 Radium in 1 Pb tube, cap 0 3-7 3-i 3-9 R
The nucleation of the uncontaminated atmosphere . f tRtuLdco & D--0 ,20 40 60 80 W0 U0 1G0 180 2MFigs. 88-90.—Illustrating table 56. PENETRATION OF GAMMA RAYS. 89 Table 56.—Penetration of radium radiation. Cylindrical glass fog chamber withoutcasket. 5j> = 22 cm. Lead tube, 30 cm. or 60 cm. long. Walls, cm. thick. Part. Remarks. Dis-tance. Si. sz- ?S3. MX10-* ^Xio-3 N3Xio-° I. 0 3-4 3-o 3-7 3-7 Radium in 1 Pb tube, capped- 0 Radium in 1 Pb tube, cap 0 3-7 Radium in 1 Pb tube, cap 0 3-7 3-i 3-9 Radium in 1 Pb tube, cap off- 0 3-3 3-9 00 0 O 0 O Radium in 2 Pb tubes cap off- 0 3-4 3-3 3-2 Radium in 2 Pb tubes cap on- 0 3-3 3-3 3-2 II. 0 3-2 10 0 3-6 3-6 10 3-1 3-1 3-2 30 2-3 3-o 5-4 100 3-6 3-6 3-6 200 i-5 i-5 i-5 50 5-o to 4-7 3-9 0 0 0 0 0 Q * Air effect
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