\\ Species Tag:        &   13001 & Name:&  C-13-atom      
\\ Version:            &       2 & & $^{13}$C isotope
\\ Date:       &  Jan. 1991      & & 
\\ Contributor:&  H. M. Pickett & & 
\\             &                 & & 
\\ Lines Listed:       &       7 & Q(300.0)=&       15.668 
\\ Freq. (GHz) $<$     &     810 & Q(225.0)=&       14.976 
\\ Max. J:             &       3 & Q(150.0)=&       13.721 
\\ LOGSTR0=            &   -15.4 & Q(75.00)=&       10.728 
\\ LOGSTR1=            &    -6.0 & Q(37.50)=&        7.086 
\\ Isotope Corr.:      &  -1.955 & Q(18.75)=&        4.060 
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&        2.496 
\\ $\mu_a$ = &                   & A=& 
\\ $\mu_b$ = &                   & B=& 
\\ $\mu_c$ = &                   & C=& 
\headend 
 
\hyphenation{Astrophys}
      The far-infrared lines of $^{13}$C carbon have been measured by Laser 
Magnetic Resonance (A. L. Cooksy, R. J. Saykally, J. M. Brown, and K. M.
Evenson, 1980, Astrophys.~J.~{\bf 309}, 828).  The hyperfine intervals of G.
Wolber, H. Figger, R. A. Haberstroh, and S. Peneselin, 1969, Phys.~Lett.\ 
{\bf A29}, 461, and the far-infrared lines were used for the line frequencies. 
Intensities were calculated using the free electron g factor.