for the 9r12 laser line , we find a ( 12 ) cf ( 4 ) feature located 30 +/- 3 mhz to the high-frequency side of line center , with a peak absorption coefficient of 5 x 10 ( -4 ) to 9 x 10 ( -4 ) cm ( -1 ) torr ( -1 ) , depending on temperature .
C1521970
feature
C0039476
temperature