We report the results of pulsar searches in ten globular clusters using the Robert C. Byrd Green Bank Telescope .
One new binary millisecond pulsar has been discovered in NGC 5986 with P _ { \mathrm { spin } } = 2.6 \textrm { ms } , P _ { \mathrm { orb } } = 1.3 \mathrm { d } , and a minimum companion mass of 0.16 \mathrm { M _ { \sun } } .
The companion is most likely a Helium white dwarf .
Eight of the globular clusters we searched have central densities < 10 ^ { 4 } \mathrm { L _ { \sun } } \mathrm { pc ^ { -3 } } , making this a good sample for studying the pulsar content of low density clusters .
We find no evidence for pulsars in clusters with very low densities ( < 10 ^ { 3 } \mathrm { L _ { \sun } } \mathrm { pc ^ { -3 } } ) , consistent with theoretical predictions .
Null results in many of clusters we searched with moderate densities indicate that these systems do not contain a bright MSP .
Two clusters in particular , one with very low metallicity , stand in contrast to theoretical calculations by Ivanova et al .
( 12 ) .
We also find that three body exchange interaction rates calculated by ( 14 ) seem to over predict the pulsar content in the clusters we studied .