ANGULAR DISTRIBUTION OF ALPHA PARTICLES EMITTED BY ORIENTED Np$sup 237$ NUCLEI

Journal Article · Fri Dec 01 04:00:00 EST 1961 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.124.1512· OSTI ID:4812203

Hanauer, S H; Dabbs, J W.T.; Roberts, L D; Parker, G W

Np/sup 237/ nuclei were aligned through the electric quadrupole and magnetic hyperfine couplings in NpO/sup 2/Rb(NO/sup 3/)/sup 3/ cooled to 0.2 to 4.2 deg K. A complete experiment, with rotatable monoc rystalline sample, solid- state counter, thermometer, and goniometer, was enclosed in a copper container filled with He/sup 3/ gas and thermally attached to 1/2 mole of paramagnetic salt which could be cooled magnetically. The measured temperature dependence of the alpha -particle anisotropy gives A < O, P > O for the signs of the hyperfine coupling constants in NpO/sub 2/sup ++/. The alpha particles were observed to be emitted preferentially along the direction of the nuclear angular momentum vector. The results are - consistent with P- pi bonding in the NpO/sup 2/sup ++/ ion and with Hill and Wheeler's prediction of the role of barrier penetration in alpha emission from nonspherical nuclei. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-16-007092
• OSTI ID: 4812203
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 124; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ALPHA PARTICLES
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
ANISOTROPY
BINDING ENERGY
BISMUTH 209
COOLING
COPPER
CRYSTAL COUNTERS
CRYSTALS
DEUTERONS
DISTRIBUTION
ELECTRIC MOMENTS
EMISSION
ENERGY
GAMMA RADIATION
GASES
HELIUM 3
HILL-WHEELER THEORY
HYPERFINE STRUCTURE
INSTRUMENTS
INTERACTIONS
LITHIUM
MAGNETIC MOMENTS
MAGNETISM
MEASURED VALUES
MOMENTUM
NEPTUNIUM 237
NEPTUNIUM OXIDES
NUCLEAR EMULSIONS
NUCLEAR REACTIONS
PARAMAGNETISM
PHYSICS
PROTONS
RUBIDIUM NITRATES
TEMPERATURE
THERMOMETERS
VECTORS
VESSELS