| Component(1) | Fraction by weight | A | Z | (Z/A) |
Density [g/cm3] |
Radiation Length [cm] |
Radiation Length [g/cm2] |
|---|---|---|---|---|---|---|---|
| N2 | 0.755207 | 14.0067 | 7. | 0.49976 | 0.001165 | 32622. | 37.9900 |
| O2 | 0.231422 | 15.9994 | 8. | 0.50019 | 0.001330 | 25740. | 34.24 |
| Ar | 0.012882 | 39.948 | 18. | 0.45059 | 0.001661 | 11772. | 19.55 |
| CO2 | 0.000477 | 14.9108 | 7.45418 | 0.49991 | 0.001829 | 19789. | 36.1972 |
| Ne | 0.000013 | 20.1797 | 10. | 0.49555 | 0.000839 | 34486. | 28.93 |
| Air (20°C, 1 atm) | 14.8026 | 7.3734 | 0.49811 | 0.001204 | 30410. | 36.6160 | |
|
Air (20°C, 1 atm) from PDG |
0.49919 | 0.001205 | 30423. | 36.66 |
Calculation performed using the method described here
The corresponding definition of this material in
/* $Id: AliITSvPPRasymm.cxx,v 1.70 2003/08/14 20:24:51 nilsen Exp $ */is :
AliMaterial(10,"SDD AIR$",0.14610E+02,0.73000E+01,0.12050E-02,0.30423E+05,0.99900E+03);