Accession Number : ADA255447


Title :   Excitation of Nuclei by Antiproton Annihilation at Rest


Descriptive Note : Final rept. 15 Jun 1991-14 Jun 1992


Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS


Personal Author(s) : Smith, Gerald


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a255447.pdf


Report Date : Jun 1992


Pagination or Media Count : 64


Abstract : Research leading to the detailed characterization of antiproton annihilation in nuclei has resulted in three publications during the past year. We have reported on neutron yields and angular distributions from annihilation in uranium. This work is important to our SHIVA Star subcritical microfission measurements currently in progress at the Phillips Laboratory, Kirtland AFB. Proton spectra indicate the presence of multinucleon annihilation in carbon and uranium targets. This is important in determining the premission yield of nucleons in annihilation on uranium. The existence of rare hypernuclei formed in antiproton annihilation on uranium and bismuth has been observed. These states live a fraction of a nanosecond, and are of considerable interest to theorists trying to understand the binding of particles in heavy nuclei.


Descriptors :   *NUCLEI , *ANTIPROTONS , MEASUREMENT , DISTRIBUTION , CARBON , TARGETS , PROTONS , SPECTRA , PARTICLES , NUCLEONS , BISMUTH , DOCUMENTS , LABORATORIES , WORK , URANIUM , NEUTRONS , STARS


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE