Elastic and Inelastic Scattering of 27.6 Mev Deuterons in Ni. Report No. 55; DISPERSION ELASTICA E INELASTICA DE DEUTERONES DE 27,6 Mev POR Ni. INFORME NO. 55

Technical Report · Sun Jan 01 00:00:00 EST 1961

OSTI ID:4829303

Mayo, S; Rosenblatt, J

Elastic and inelastic differential cross sections in Ni(d,d)Ni with 27.6 Mev deuterons were measured with the aid of scintillation technique. Charged particle spectra from the reaction were observed at laboratory angles of 15 up to 150 degrees, showing the presence of Q-positive stripping protons and elastic and inelastic deuteron groups. Due to isotopic mixture in natural Ni and the rather high level density above 2 Mev of excitation in most of those isotopes, only inelastic deuteron groups going to the first excited states in Ni/sup 58/ and Ni/ sup 60/ could be identified. Elastic angular distribution exhibits similarities to that obtained by Yntema at 21.6 Mev, showing the typical diffraction patterns. At backward angles, a slight growing in the crosssection was observed which was not observed at 21.6 Mev. By regarding the elastic scattering like a classical light diffraction by a black disk, an interaction radius of 6.8 plus or minus 0.8 f was derived. Inelastic angular distributions were fitted by semiclassical Butler et al. theory and Huby-Newns theory. Due to above-mentioned limitations level mixtures could not be avoided; however, a group of deuterons going to Ni/ sup 58/ 1.45 Mev, probably mixed with Ni/sup 60/ 1.33 Mev, could be identified as proceeding via direct interaction with l = 2 and interaction radius 6.7 f and 6.9 f, respectively. Another inelastic group identified as Ni/sup 58/ 2.46 Mev mixed with Ni/sup 60/ 2.50 Mev is well fitted by l = 2 plus l = 4 and interaction radius 8.9 f and 8.7 f respectively, showing direct interaction behavor. Contributions to the above processes from compound nucleus formation are small as can be seen from absolute cross sections above 50 degrees. Total cross section for the formation of compound nucleus is about 860 mbarn. According to selection rules for deuteron scattering, 2/sup +/ is assigned to levels 1.45 Mev and 2.46 Mev in Ni/sup 58/; however this assignment is not definitive due to background from levels in Ni/sup 58/ and Ni/sup 60/ present at those excitation energies. (auth)

• Research Organization: Argentina. Comision Nacional de Energia Atomica, Buenos Aires
• NSA Number: NSA-16-002488
• OSTI ID: 4829303
• Report Number(s): NP-10975
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-62
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

PHYSICS
ANGULAR DISTRIBUTION
BORN APPROXIMATION
BUTLER THEORY
CHARGED PARTICLES
COMPOUND NUCLEI
CONFIGURATION
CROSS SECTIONS
DEUTERON BEAMS
DIFFRACTION
DIRECT REACTIONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
INTERACTIONS
ISOTOPES
MEASURED VALUES
MIXING
NICKEL 58
NICKEL 60
NUCLEAR REACTIONS
NUCLEI
PERTURBATION THEORY
PROTONS
Q-VALUE
QUANTUM MECHANICS
SCATTERING
SCINTILLATION COUNTERS
SELECTION RULES
SPECTRA
STRIPPING
TRANSIENTS