NSF Spectral Data Options

Help

Display the following isotopes:

Formula   (# of lines)
14N32S19F    (149)
14N34S19F    (34)
Total:      (183)

Frequency Range:
to MHz
GHz

ASCII output instead of HTML tables

Clear
The following information may be useful
in choosing which isotopes to search.

 Isotope   Relative
Atomic Mass 		    Isotopic
  Composition  		 Standard
Atomic Weight 		  Notes 
 
7 N 14 14.003 074 005 2(9)   99.632(7) 14.0067(2) g,r,e
15 15.000 108 898 4(9)   0.368(7)
9 F 19 18.998 403 20(7)   100 18.998 403 2(5)  
16 S 32 31.972 070 69(12)   94.93(31) 32.065(5) g,r
33 32.971 458 50(12)   0.76(2)
34 33.967 866 83(11)   4.29(28)
36 35.967 080 88(25)   0.02(1)

[skip navigation] National Institute of Standards and Technology NIST Physics Laboratory NIST Physics LaboratoryAtomic Weights and Isotopic Compositions Main Page

Constants Data for NSF
References for NSF
NIST Chemistry Webbook Search for NSF

Specific Corrections and Reanalysis of the Data:

Three transitions fit poorly and were excluded from the final analysis. Their calculated frequencies are shown below along with Deltanu which is nuobs-nucal:

MHz
  11,0-10,1   42 324.390(14) MHz   Deltanu=0.400 MHz
152,13-161,16   20 474.989(22) MHz   Deltanu=0.229 MHz
154,12-163,13   20 649.868(19) MHz   Deltanu=0.218 MHz

The centrifugal distortion results given are identical to those reported by Kirchhoff [72031], however, the molecular constants are quoted with more significant figures. An improved analysis of the nuclear quadrupole interaction of 14N was obtained from a fit to 33 hyperfine components with a standard deviation of 0.047 MHz.

NIST Physics Laboratory [skip navigation] National Institute of Standards and Technology NIST Physics Laboratory Back to the molecule selection page Back to the Triatomic Spectral Database main page