Accession Number : AD0612508

Title :   DETERMINATION OF THE SPIN AND PARITY OF NUCLEAR EXCITED STATES BY THE EXPERIMENTAL MEASUREMENT OF TRIPLE CORRELATIONS IN (P, GAMMA-GAMMA) REACTIONS.

Descriptive Note : Final rept., phase 1,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : GOSSETT,C. R. ; August,L. S.

Report Date : 12 FEB 1965

Pagination or Media Count : 95

Abstract : The measurement of triple correlations in (p, gammagamma) reactions to determine spin and parity of nuclear excited states has not been widely used in the past, despite the capability of such measurements to produce generally unambiguous assignments, because of the low efficiency, the complexity, and the difficulty of such measurements when performed by standard techniques. An experimental arrangement is described which allows the measurement of triple correlations with an exceptionally high efficiency and multiplicity (the capability of measuring many different correlations simultaneously). This improvement has been obtained primarily from the successful application of a three-crystal double sumcoincidence spectrometer. An explanation of the method and detailed descriptions of the physical apparatus, electronic circuitry, experimental procedures, and data analysis are given. The results of an extensive triple correlation experiment on the 60Ni)(p, gamma-gamma)61 Cu reaction are presented with the conclusions regarding the spin and probable parity of six of the lowest-lying energy levels and a discussion of the applicability of certain nuclear models to this nucleus. (Author)

Descriptors :   (*NUCLEAR SPINS, DETERMINATION), (*PARITY, DETERMINATION), (*GAMMA PROTON REACTIONS, NUCLEAR PROPERTIES), NUCLEAR RADIATION SPECTROSCOPY, NUCLEAR MODELS, PROTON CAPTURE, GAMMA EMISSION, COINCIDENCE COUNTING, CORRELATION TECHNIQUES, NUCLEAR ENERGY LEVELS, PROTON BEAMS, NICKEL, COPPER

Distribution Statement : APPROVED FOR PUBLIC RELEASE