Structural and statistical aspects of extensive level schemes from (N,. gamma. ) and transfer reactions

Conference · Tue Jan 15 04:00:00 EST 1985 · AIP Conf. Proc.; (United States)

OSTI ID:5509370

von Egidy, T; Hungerford, P; Schmidt, H H; Scheerer, H J; Behkami, A N; Hlawatsch, G; Krusche, B; Lieb, K P; Boerner, H G; Kerr, S A; others, and

The very precise spectrometers for (n,..gamma..) and (n,e) reactions at the ILL, Grenoble, and the high resolution Q3D spectrograph at the Munich Tandem Accelerator yield very detailed information on nuclear transitions and excitations. These results allow the establishment of level schemes which are rather complete in a given spin and energy region and which contain frequently more than 70 levels with spin and parity information. Recently the nuclei /sup 20/F, /sup 24/Na, /sup 28/Al, /sup 36/Cl, /sup 40/K, /sup 41/K, /sup 42/K, /sup 114/Cd, /sup 134/Cs, /sup 155/Sm, /sup 154/Eu, /sup 155/Gd, /sup 161/Dy, /sup 163/Dy and several actinide nuclei have been investigated. The limits of this method and the possibilities to identify nuclear structures will be discussed. In particular the mixing of single particle and vibrational excitations in deformed nuclei will be treated. A statistical analysis of these extensive level schemes gives information on the level density, on the strength of gamma transitions and on gamma multiplicities of levels. A systematic survey of gamma multiplicities of low spin levels shows that these multiplicities increase only slowly after the first 20 levels while the spread seems to decrease. Level density parameters for the constant temperature and Bethe formulae are determined. These formulae reproduce nicely the experimental level densities.

• Research Organization: Physik-Department, Technische Universitaet Muenchen, D8046 Garching, Germany
• OSTI ID: 5509370
• Report Number(s): CONF-840906-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 125:1
• Country of Publication: United States
• Language: English

Related Subjects

651100* -- Nuclear Physics-- Experimental Techniques-- (1980-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CAPTURE
CONFIGURATION MIXING
E1-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELECTRON EMISSION
EMISSION
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
GAMMA RADIATION
HADRON REACTIONS
INTERACTIONS
IONIZING RADIATIONS
M1-TRANSITIONS
MULTIPOLE TRANSITIONS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
OSCILLATION MODES
RADIATIONS
SINGLE-PARTICLE MODES
SPECTRA
VIBRATIONAL STATES