DOUBLE COULOMB EXCITATION WITH OXYGEN IONS

Technical Report · Mon Jan 01 04:00:00 EST 1962

OSTI ID:4776749

Graetzer, R; Bernstein, E M

Total cross sections for Coulomb excitation of the first and second excited states of the ground state rotational bands of eight even-even rare earth nuclei were measured. Oxygen ions accelerated to energies in the range 14 to 50 Mev produced the nuclear excitations. The transitions from the second excited state (4/sup +/) to the first (2/sup +/), and from the first to the ground state (0/sup +/), were detected by analyzing the emitted internal conversion electrons in a Wedge-shaped magnetic beta ray spectrometer. Cross sections for excitation of the 2/sup 1/ levels yield B(E2) values in satisfactory agreement with those obtained from lifetime measurements and from inelastic scattering of protons, deuterons, and alpha particles. Cross sections for double E2 excitation of the 4/ sup +/ levels are in qualitative agreement With the multiple Coulomb excitation theory of Alder and Winther. The energies of the 4/sup +/ levels are Sm/sup 152/ , 366.2 kev; Sm/sup 154/, 267.1 kev; Gd/sup 160/, 248.6 kev; Dy/sup 162/, 266.0 kev; Er/sup 170/, 261.5 kev; Yb/sup 176/, 271.9 kev; Hf/sup 180/, 309.4 kev; and W/sup 184/, 363.4 kev. In all cases the uncertainty is plus or minus 2 kev. (auth)

• Research Organization: Wisconsin. Univ., Madison
• NSA Number: NSA-17-000801
• OSTI ID: 4776749
• Report Number(s): TID-16963
• Country of Publication: United States
• Language: English

Related Subjects

BETA SPECTROMETERS
CROSS SECTIONS
DYSPROSIUM 162
ELECTRIC FIELDS
ELECTRONS
ENERGY LEVELS
ERBIUM 170
EXCITATION
GADOLINIUM 160
HAFNIUM 180
INTERNAL CONVERSION
IONS
OXYGEN
PHYSICS
RARE EARTHS
SAMARIUM 152
SAMARIUM 154
TUNGSTEN 184
YTTERBIUM 176