Accession Number : AD0620517

Title :   AN ISOSPIN 3/2 LEVEL OF BE9,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Lynch,B. ; Griffiths,G. M. ; Lauritsen,T.

Report Date : 26 OCT 1964

Pagination or Media Count : 6

Abstract : A state of Be9 has been found at an excitation energy of 14.392=0.005 MeV, with a width less than 5 keV. The state is formed in the reaction Li7(He3, p)Be9 and corresponds closely in energy to the expected analogue of the ground state of Li9. These facts, together with the small width, suggest an assignment of T = 3/2. The angular distribution of protons corresponding to the 14.39 MeV state is nearly symmetric about 90 degrees in the centre-of-mass with maxima at 40 degrees and 150 degrees. The 90 degree differential cross sections are approximately the same for 6.5 and 10 MeV He3, with a minimum value between these energies. The total cross sections for 10 MeV He3 and 7.5 MeV are given. (Author)

Descriptors :   (*BERYLLIUM, NUCLEAR ENERGY LEVELS), (*NUCLEAR SPINS, BERYLLIUM), EXCITATION, PARITY, SELECTION RULES(PHYSICS), DIFFERENTIAL CROSS SECTIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE