K-Conversion Coefficients of Transitions in In114 and Cd114

1967 ◽  
Vol 22 (3) ◽  
pp. 309-316
Author(s):  
M. S. El-Nesr ◽  
Z. Awwad ◽  
M. R. El-Aassar
Keyword(s):  
High Resolution ◽  
Excellent Agreement ◽  
Conversion Coefficient ◽  
Electric Quadrupole ◽  
Isomeric Transition ◽  
Conversion Method ◽  
Conversion Coefficients ◽  
Double Focusing ◽  
First Time ◽  
Good Agreement

The K-conversion coefficients of the 192 keV isomeric transition in In114 and the 556 and 722 keV transitions in Cd114 have been measured for the first time by means of a high resolution double focusing β-ray spectrometer, using the internal-external conversion method. The results obtained are:αk (192 keV-In114) = 2.3653 ± 0.3075,in excellent agreement with the theoretical value 2.4638 for pure E4 transition calculated by SLIV and BAND, andαK (556 keV-Cd114) = 0.00419 ± 0.00046,αK (722 keV - Cd114) = 0.00207 ± 0.00025,both results in excellent agreement with the theoretical values for pure electric quadrupole radiation 0.00432 and 0.00218 respectively computed by SLIV and BAND. These data confirm the essentially pure E4 character of the 5 + → 1 +, 192 keV transition in In114 and the pure E2 character of the 4 + → 2 +, 722 keV and 2 + → 0 +, 556 keV transitions in Cd114. The conversion coefficient measurements reported here in Cd114 and In114 (Z=48 and 49) and in earlier studies (Z=22 - 28 and 56) indicate that E2-conversion coefficients in the Z region below 60 are in good agreement with theory.

LX-ray Spectra and E2 Internal Conversion Coefficients in Radon and Radium

1973 ◽  
Vol 28 (10) ◽  
pp. 1635-1641 ◽  
Author(s):  
A. G. de Pinho ◽  
M. Weksler
Keyword(s):  
Excited States ◽  
Internal Conversion ◽  
Electric Quadrupole ◽  
Alpha Decay ◽  
X Ray ◽  
Internal Conversion Coefficients ◽  
Conversion Coefficients ◽  
Good Agreement

The X-ray spectra resulting from the internal conversion of electric quadrupole transitions following the alpha decay of Th230 and Ra226 were analysed with a Si (Li) spectrometer. From the knowledge of the Coster-Kronig and fluorescence yields, the internal conversion coefficients of the E2 transitions from the first excited states in Ra226 and Rn222 could be deduced. Results are in good agreement with theoretical values.

γ Transitions in the Decay of 99Mo

1969 ◽  
Vol 24 (12) ◽  
pp. 1893-1897 ◽  
Author(s):  
E Bashandy
Keyword(s):  
High Resolution ◽  
Internal Conversion ◽  
Internal Conversion Coefficients ◽  
Conversion Coefficients ◽  
Γ Rays ◽  
Double Focusing ◽  
Conversion Spectrum

AbstractThe internal conversion spectrum of γ transitions in the decay of 99Mo has been re-studied using a high resolution double focusing β-ray spectrometer. In addition to γ-rays previously reported, seven more γ-rays could be observed. Internal conversion coefficients and multipolarities of γ transitions are given. Energies, spins and parities of high excited levels in 99Tc are confirmed.

Nature of Some Transitions Occurring in 97Nb Populated from the Decay of 97Zr

1971 ◽  
Vol 49 (12) ◽  
pp. 1649-1661 ◽  
Author(s):  
D. S. Murty ◽  
P. Jagam ◽  
V. Lakshminarayana
Keyword(s):  
Low Energy ◽  
Magnetic Spectrometer ◽  
Correlation Experiment ◽  
Conversion Coefficients ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
Double Focusing ◽  
First Time

Some of the low energy gamma transitions occurring in the decay of 97Zr to 97Nb were investigated with a 50 cm radius double focusing magnetic spectrometer. On the basis of the conversion coefficients determined from this investigation, a gamma–gamma directional correlation experiment was carried out for the 355–1750 keV cascade occurring in 97Nb. The combined results of the two investigations made it possible to assign spins and parities for a few levels in 97Nb for the first time.

THE IEC METHOD AND CONVERSION COEFFICIENTS OF THE 605-keV TRANSITION IN 134Ba

1966 ◽  
Vol 44 (3) ◽  
pp. 549-562 ◽  
Author(s):  
E. F. Zganjar ◽  
J. H. Hamilton
Keyword(s):  
Beta Decay ◽  
Photon Energy ◽  
Conversion Coefficient ◽  
Theoretical Calculations ◽  
Accurate Determination ◽  
A Value ◽  
Conversion Coefficients ◽  
Double Focusing ◽  
Made In

Tests of the internal–external method of measuring conversion coefficients in the Vanderbilt double-focusing spectrometer have been made in search of possible errors arising from scattering of photoelectrons in the converter for a photon energy of 605 keV. This scattering may affect the factor, f, which corrects for the anisotropic distribution of the photoelectrons. The 605-keV transition in 134Ba populated by the beta decay of 134Cs was used. An accurate determination of the K, L, and M conversion coefficients of the 2+ to 0+, 605-keV, E2 transition in 134Ba was made. Three uranium converters 1.12, 2.19, and 3.71 mg/cm2 thick were used. The results are compared with the new theoretical calculations of f which depend on the converter thickness and consequently consider the effect of scattering. For photons of energy 605 keV or greater, the IEC method used in the Vanderbilt double-focusing spectrometers is insensitive (< 5%) to scattering in uranium converters < 4 mg/cm2 thick. The K, L, and M conversion coefficients were determined to be (5.03 ± 0.20) × 10−3, (7.07 ± 0.50) × 10−4, and (1.64 ± 0.18) × 10−4, respectively. The respective theoretical values of Rose are 5.08 × 10−3, 6.92 × 10−4, and 2.77 × 10−4. Sliv and Band give a value of 5.10 × 10−3 for the K conversion coefficient.

Low Energy Gamma Transitions in 171Tm

1970 ◽  
Vol 25 (7) ◽  
pp. 1043-1045 ◽  
Author(s):  
M. S. El-Nesr
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Low Energy ◽  
Conversion Coefficients ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
Double Focusing

The low energy gamma-ray spectrum of 171Er has been studied with the use of both Ge (Li) gamma-ray and a high resolution iron free double focusing beta-ray spectrometer. The data provide K-conversion coefficients and multipolarities of eight gamma-rays. Spin and parity assignments 7/2+, 3/2+, 5/2+ and 5/2+ are given to the 636, 676, 738 and 913 keV levels respectively

Level Structure of 143Pr from γ Decay

1971 ◽  
Vol 26 (4) ◽  
pp. 683-689 ◽  
Author(s):  
E. Bashandy
Keyword(s):  
High Resolution ◽  
Nuclear Energy ◽  
Internal Conversion ◽  
Level Structure ◽  
Internal Conversion Coefficients ◽  
Nuclear Models ◽  
Conversion Coefficients ◽  
Γ Rays ◽  
Γ Ray ◽  
Double Focusing

Abstract The γ decay of 143Ce has been investigated using both a Ge(Li) γ ray and a high resolution iron free double focusing β-ray spectrometer. In addition to γ rays previously reported, more γ rays could be observed. Internal conversion coefficients and multipolarities of γ transitions were determined. Ten excited nuclear energy states have been established in 143Pr at 57, 341, 491, 722, 939, 1045, 1061, 1161, 1382 and 1452 keV. Possible spin values have been assigned to all these states on the basis of conversion coefficients of γ rays. The level structure of 143Pr is discussed in terms of existing nuclear models.

Study of the radioactive decays of 140Ba and 140La

1991 ◽  
Vol 69 (2) ◽  
pp. 90-101 ◽  
Author(s):  
Bakhshish Chand ◽  
Jatinder Goswamy ◽  
Devinder Mehta ◽  
Nirmal Singh ◽  
P. N. Trehan
Keyword(s):  
Conversion Coefficient ◽  
Setup Time ◽  
X Rays ◽  
Conversion Electrons ◽  
X Ray ◽  
Mixing Ratios ◽  
Hpge Detectors ◽  
Conversion Coefficients ◽  
Γ Rays ◽  
First Time

The intensities of X rays and γ rays from the decays of 140Ba and 140La were measured precisely using Si(Li) and HPGe detectors. The L X-ray intensities in 140Ba decay are reported for the first time. The conversion electrons from these decays are investigated using a mini-orange electron spectrometer. The electron intensities for the (M + N.) conversion of 329, 487, 1596, and 1903 keV transitions in 140Ce were measured for the first time. From the present conversion-electron and γ-ray intensities, the conversion coefficients for various transitions in 140La and 140Ce were determined. Also, the γ–γ directional correlations for 15 cascades in,140Ce were studied using a HPGe–HPGe detector coincidence setup (time resolution = 7 ns). The 109–(329)– 487, 131–242, and 131–266 keV cascades in 140Ce were studied for the first time. The multipole mixing ratios for the 109, 131, 242, 266, 329, 432, 487, 751, 816, 868, 919, 925, and 951 keV transitions in 140Ce are deduced from the present directional correlation and conversion-coefficient measurements.

scholarly journals Properties of High Lying Levels in 199Au

1967 ◽  
Vol 22 (10) ◽  
pp. 1538-1542
Author(s):  
E. Bashandy ◽  
G. M. El-Sayad
Keyword(s):  
High Resolution ◽  
Energy Level ◽  
Conversion Method ◽  
Level Spectrum ◽  
Conversion Coefficients ◽  
Γ Rays

The energy level spectrum of 199Au excited in the decay of the 30 min activity of 199Pt was investigated by means of a high resolution, double focussing β-ray spectrometer. The K- and L-conversion ratios of the 196 and 221 keV γ rays show that both are pure E2 transitions. The internal K-conversion coefficients of the 541, 790 and 960 keV γ rays were determined by the internalexternal conversion method, and the following results were obtained:αK (541) =0.059 ± 0.007; αK (790) =0.023 ± 0.003; αK (960) = 0.062 ± 0.008.The multipolarity assignments of these transitions were studied on the basis of the conversion coefficients. These data and the studies of other workers were combined to obtain the spins and parities 5/2 +, 1/2 +, 3/2 + and 9/2 + for the 541, 737, 790 and 960 keV levels in 199Au.

Low-lying Levels in Odd-mass Au Nuclei

1973 ◽  
Vol 28 (10) ◽  
pp. 1603-1606
Author(s):  
E. Bashandy ◽  
M. S. El-Nesr ◽  
M. G. Mousa
Keyword(s):  
High Resolution ◽  
Excited States ◽  
Internal Conversion ◽  
Energy Levels ◽  
Level Structure ◽  
Low Energy ◽  
Internal Conversion Coefficients ◽  
Nuclear Models ◽  
Conversion Coefficients ◽  
Double Focusing

The low energy levels of 197Au and 199Au have been investigated by means of a high resolution double focusing beta-ray spectrometer. The conversion electron ratios as well as the K-conversion coefficients of low-lying transitions were determined. The K-internal conversion coefficients of the 191 keV transition in 197Au indicated no EO contribution. The level structure of the lower excited states in 197Au and 199Au are discussed in terms of existing nuclear models.

The Deformation Structure of the Nuclei 32S and 36Ar

2017 ◽  
Vol 13 (2) ◽  
pp. 4678-4688
Author(s):  
K. A. Kharroube
Keyword(s):  
Single Particle ◽  
Electric Quadrupole ◽  
Quadrupole Moments ◽  
Moments Of Inertia ◽  
Deformation Structures ◽  
Particle Potential ◽  
Nilsson Model ◽  
Single Particle Potential ◽  
Axes Of Symmetry ◽  
Good Agreement

We applied two different approaches to investigate the deformation structures of the two nuclei S32 and Ar36 . In the first approach, we considered these nuclei as being deformed and have axes of symmetry. Accordingly, we calculated their moments of inertia by using the concept of the single-particle Schrödinger fluid as functions of the deformation parameter β. In this case we calculated also the electric quadrupole moments of the two nuclei by applying Nilsson model as functions of β. In the second approach, we used a strongly deformed nonaxial single-particle potential, depending on Î² and the nonaxiality parameter γ , to obtain the single-particle energies and wave functions. Accordingly, we calculated the quadrupole moments of S32 and Ar36 by filling the single-particle states corresponding to the ground- and the first excited states of these nuclei. The moments of inertia of S32 and Ar36 are then calculated by applying the nuclear superfluidity model. The obtained results are in good agreement with the corresponding experimental data.

Sign in / Sign up

Export Citation Format

Share Document