M1 radiation widths in /sup 27/Al

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.35.921· OSTI ID:6923829

Vodhanel, R; Moreh, R; Sellyey, W C; Brussel, M K; Wildenthal, B H

Nuclear resonance fluorescence from energy levels in /sup 27/Al lying between 2 and 10 MeV excitation energy has been measured with bremsstrahlung beams of end-point energies of 7.66 and 10.37 MeV. Values of gGAMMA/sub 0/ and gGAMMA/sub 0/GAMMA/sub ..gamma..//GAMMA for 39 levels below 10 MeV were obtained from scattering cross section and self-absorption measurements. The measurements give an upper bound of total B(M1up-arrow) below 7.7 MeV excitation which is about 25% less than the predictions of a large-scale shell model calculation based on the free-nucleon M1 operator. The same shell model wave functions combined with an effective M1 operator based on moments and transitions between low-lying states is in good agreement with the present experimental results.

• Research Organization: Nuclear Physics Laboratory, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820
• OSTI ID: 6923829
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 35:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM 27
ALUMINIUM 27 TARGET
ALUMINIUM ISOTOPES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BREMSSTRAHLUNG
CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FLUORESCENCE
FUNCTIONS
INELASTIC SCATTERING
ISOTOPES
LIGHT NUCLEI
LUMINESCENCE
M1-TRANSITIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
MULTIPOLE TRANSITIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PHOTONUCLEAR REACTIONS
RADIATIONS
SCATTERING
SHELL MODELS
SPIN
SPIN FLIP
STABLE ISOTOPES
TARGETS
WAVE FUNCTIONS