Abstract
A search was made for new isotopes of the elements lithium through nitrogen produced in the high-energy (4.8-GeV) proton irradiation of a uranium target. The fragments were identified by and time-of-flight techniques. An electronic pulse-width discriminator greatly reduced the background allowing high sensitivity. A new method for analyzing time-of-flight data and a new algorithm for particle identification were introduced. Two new isotopes, and , were observed to be particle stable and the existence of was confirmed. It was shown that and are particle unbound. Approximate production cross sections were determined for , , , and , and upper limits estimated for , , , and .
[NUCLEAR REACTIONS , GeV; , , , measured ; , , , upper limits.]
[NUCLEAR STRUCTURE , , observed particle bound; , particle unbound.]
- Received 10 October 1973
DOI:https://doi.org/10.1103/PhysRevC.9.836
©1974 American Physical Society