Measurement and analysis of the muonic x rays of /sup 151/Eu and /sup 153/Eu

Journal Article · Tue May 01 04:00:00 EDT 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.1897· OSTI ID:6758672

Tanaka, Y; Steffen, R M; Shera, E B; Reuter, W; Hoehn, M V; Zumbro, J D

Monopole and quadrupole charge distributions of /sup 151/Eu and /sup 153/Eu were investigated by muonic atom K and L x-ray measurements. The model-independent Barrett charge radii R/sub k/ and the isotope shift ..delta..R/sub k/ were measured, and the value of ..delta.. = 0.606(18) fm/sup 2/ was deduced. This isotope shift is the largest known of all nuclear pairs. The isomer shift of the first excited state of /sup 153/Eu is found to be close to zero, in contrast to the large isomer shifts observed in its neighbors: /sup 152/Sm and /sup 154/Gd. The quadrupole moments of the first excited states were determined as Q/sup 151/((7/2)/sup +/) = 1.28(2) e b and Q/sup 153/((7/2)/sup +/) = 0.44(2) e b. The value for /sup 151/Eu and its ground-state quadrupole moment of Q/sup 151/((5/2)/sup +/) = 0.90(1) e b reported previously are several times larger than the respective single particle units. This fact shows that a fair amount of collectivity is involved in the (5/2)/sup +/ ground state and in the (7/2)/sup +/ first excited state of /sup 151/Eu.

• Research Organization: Department of Physics, Purdue University, West Lafayette, Indiana 47907
• OSTI ID: 6758672
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

640303 -- Atomic
Molecular & Chemical Physics-- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
651823* -- Nuclear Properties & Reactions
A=150-189
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM
ATOMS
CHARGE DISTRIBUTION
DATA
DEFORMATION
ELEMENTS
ENERGY LEVELS
EUROPIUM
EUROPIUM 151
EUROPIUM 153
EUROPIUM ISOTOPES
EXPERIMENTAL DATA
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOMER SHIFT
ISOTOPES
METALS
MONOPOLES
MUONIC ATOMS
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
QUADRUPOLE MOMENTS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
RARE EARTHS
SPECTRA
SPECTRAL SHIFT
SPIN
STABLE ISOTOPES
X-RAY SPECTRA