Detailed analysis of the single pulse emissions from PSR J1920+1040 was conducted using high sensitivity observations with the Five-hundred-meter Aperture Spherical radio Telescope at 1250 MHz. Our investigation reveals the significant nulling and subpulse drift behavior exhibited by this pulsar. We found that its null state typically lasts for 10−30 pulse periods, and the estimated overall nulling fraction is approximately 55% ± 3%. In particular, this pulsar exhibits a distinctly periodic null with a repetition period of about 32P, where P is the pulsation period. We compared the integrated pulse profiles of the first active pulse and the last active pulse, revealing that the former was wider and weaker. This pulsar exhibits a clear subpulse drift characteristic with a mean repetition period of P3 = 2.7 ± 0.2, while the longitude-resolved fluctuation spectrum (LRFS) analysis of shorter pulse sequences further reveals previously unobserved variations in its drift features that have not been noted in previous studies. The separation between subpulses is estimated to be P2 = 5.3 ± 0.7. Further polarization analysis suggests that the inclination and impact angles are approximately 14.°2 and 2.°0, respectively, with radio emission originating at a height of approximately 636 km. Finally, no clear memory effect was identified in this pulsar. Additionally, the lack of a significant correlation between nulling and subpulse drifting suggests that these two phenomena likely arise from different physical mechanisms.

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