ELECTRIC MONOPOLE TRANSITIONS IN Ge$sup 70$ AND Zr$sup 9$$sup 0$

Journal Article · Fri Feb 14 23:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys.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.109.1222· OSTI ID:4308470

Alburger, D E

The electric monopole crossover transition from the 1.215 Mev 0+ second excited state to the ground state of Gem has been observed with am intermediate- image betaray spectrometer arranged for electron-electron coincidence measurements. Internal conversion electrons in delayed coincidence with Ga/sup 70/ beta rays correspond to a 1.215-Mev transition intensity of 0.0025% per disintegration. Total beta-ray branching to the 1.215-Mev state is 0.18%, mostly followed by a (0.173 plus or minus 0.002)--(1.042 plus or minus 0.005) Mev gamma-ray cascade through the first excited state. Beta-ray branching to the 1.042-Mev level in Ge/sup 70/ is 0.30%. Beta-conversion-electron delayed coincidence measurements taken at the peak of the 0.173-Mev K-line give a half- life value of (3.0 plus or minus 0.5) x 10/sup -9/ sec for the 1.215-Mev state. It follows that the partial half-life for K-conversion of the 0--0 transition is (2.4 plus or minus 1.2) x 10/sup -7/ sec which compares with 1.6 x 10/sup -7/ sec expected if the matrix element were the same as for the 0--0 transition in Ge/ sup 72/. Using similar techniques on Y/sup 90/ the half-life of the 1.75 Mev 0-- 0 transition in Zr/sup 90/ has been found to be (6 plus or minus 1.5) x 10/sup - 8/ sec. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-12-006801
• OSTI ID: 4308470
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 109; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BETA PARTICLES
BETA SPECTROMETERS
BORN APPROXIMATION
COINCIDENCE METHODS
DIFFERENTIAL EQUATIONS
DISPERSION RELATIONS
DISPERSIONS
EFFICIENCY
ELECTRIC CHARGES
ELECTRIC MOMENTS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LEVELS
EQUATIONS
EXCITATION
GAMMA RADIATION
GERMANIUM 70
HALF-LIFE
INTEGRALS
INTERNAL CONVERSION
MATRICES
MOMENTUM
MONOPOLES
NUCLEAR MODELS
PARITY
PERTURBATION THEORY
PHYSICS
SCATTERING
SPECTRA
SPIN
TRANSIENTS
TRANSITIONS
YTTRIUM 90
ZIRCONIUM 90