THE NEW ISOTOPES Cd104 AND Ag104

1955 ◽  
Vol 33 (12) ◽  
pp. 841-855 ◽  
Author(s):  
F. A. Johnson
Keyword(s):  
Decay Scheme ◽  
Low Energy ◽  
Subsequent Growth ◽  
Chemical Methods ◽  
Line Intensities ◽  
In Series ◽  
Mcgill University ◽  
Positron Spectrum ◽  
Γ Rays ◽  
Γ Ray

Two new neutron deficient isotopes Cd104 (59 min.) and Ag104 (27 min.) have been produced by the reaction Ag107(p, 4n)Cd104 at 50 Mev. in the McGill University synchrocyclotron and by the subsequent growth of silver from the cadmium. These isotopes have been investigated by means of a 180° spectrograph of high resolution, a lens spectrometer, and a scintillation spectrometer. Chemical methods of identification have also been employed. Ag104 has been found to emit a positron spectrum of end point 2.70 ±.01 Mev. and a γ-ray of 556.2 kev. which is thought to be in series with the positron spectrum. The origin of a γ-ray of energy 118.4 kev. which appears to be converted in palladium is at present unknown. A tentative decay scheme is proposed. Cd104 appears to decay primarily by K-capture since no positron spectrum was observed which could be assigned to this isotope. Four γ-rays, of energies 66.7, 83.6, 123.6, and 134.2 kev., have been definitely assigned to this isotope on the basis of K−L differences shown by conversion lines; on the basis of relative L line intensities and K/L ratios the two low energy γ-rays have been shown to represent M1 transitions. Other conversion lines were found whose origin and element of conversion are unknown.

scholarly journals On the Decay of 165Dy

1968 ◽  
Vol 23 (7) ◽  
pp. 962-967
Author(s):  
E. Bashandy ◽  
N. Ibrahiem ◽  
G. El-Sayad
Keyword(s):  
Decay Scheme ◽  
Internal Conversion ◽  
Level Structure ◽  
Low Energy ◽  
Conversion Electron Spectrum ◽  
Nuclear Models ◽  
Conversion Coefficients ◽  
Γ Rays ◽  
Double Focusing ◽  
Experimental Level

The internal conversion electron spectrum of transitions in the decay of (139 min) 165Dy to 165Ho has been studied using a high resolution iron-free double focusing β-ray spectrometer. In addition to γ rays previously reported eight new γ rays, mostly in the low energy region, have been observed. A decay scheme involving 17 excited levels is proposed for 165Ho. Multipolarity data, obtained from the measurements of absolute or ratios of conversion coefficients of γ rays, were utilized for assigning possible spins and parities to the levels of 165Ho. The experimental level structure is discussed in the light of nuclear models.

The decay of 237Np

1976 ◽  
Vol 54 (13) ◽  
pp. 1409-1420 ◽  
Author(s):  
M. Skalsey ◽  
R. D. Connor
Keyword(s):  
Level Scheme ◽  
Low Energy ◽  
Coincidence Data ◽  
Γ Rays ◽  
Γ Ray

The decay of 237Np has been investigated from singles and coincidence γ-ray spectra acquired using Ge(Li) detectors. Forty-two γ rays have been observed and all but one have been placed in the level scheme of 233Pa. The presence of unobserved transitions of low energy has been confirmed by the coincidence data. Five new γ rays are reported here and a new level in 233Pa at 303.8 keV is proposed.

THE DECAY OF Cd105

1953 ◽  
Vol 31 (7) ◽  
pp. 1136-1147 ◽  
Author(s):  
F. A. Johnson
Keyword(s):  
High Resolution ◽  
Internal Conversion ◽  
High Energy ◽  
Addition Lines ◽  
End Point ◽  
Mcgill University ◽  
Positron Spectrum ◽  
Upward Curvature ◽  
Γ Rays

The isotope Cd105 (55 min.) has been produced by the Ag107 (p,3n) reaction in the McGill University synchrocyclotron and has been investigated by means of a 180° spectrograph of high resolution, a lens spectrometer, and a scintillation spectrometer.The positron end point was found to be 1.691 ± 0.005 Mev. and the Fermi plot of the spectrum was straight down to about 800 kev. where a slight upward curvature began. Internal conversion lines found in the 180° spectrograph indicated γ-rays of energies 25.50, 27.69, 263.0, 292.5, 308.0, 312.1, 317.1, 320.5, 324.9, 336.3, 340.7, 347.0, 433.1, and 606.7 kev. High energy internal conversion lines found in the lens spectrometer beyond the end point of the positron spectrum were assigned to γ-rays of energies 1.908, 1.957, 1.995, 2.045, 2.277, and 2.318 Mev.In addition lines assigned to Ag105 have been recorded. These correspond to γ-rays of energies 64.0, 280.8, 319.4, 331.5, 344.9, 392.6, and 443.2 kev., of which that of 331.5 kev. has not been reported previously.

Decay properties of 181Ir

1978 ◽  
Vol 56 (3) ◽  
pp. 321-326 ◽  
Author(s):  
I. M. Ladenbauer-Bellis ◽  
P. Sen ◽  
H. Bakhru
Keyword(s):  
Half Life ◽  
Decay Scheme ◽  
Heavy Ion ◽  
Heavy Ion Reactions ◽  
X Ray ◽  
Decay Properties ◽  
Helium Jet ◽  
Γ Rays ◽  
Ge Detector ◽  
Γ Ray

181Ir activity was produced via the following heavy-ion reactions: 169Tm (16O,4n)181Ir and 169Tm(19F,7n)181Pt (51 s) decaying to 181Ir. The half-life of 181Ir was found to be 4.90 ± 0.15 min. Singles and coincidence γ-ray measurements were performed using 30–40 cm3 Ge(Li) detectors. X-Ray measurements were carried out using an intrinsic Ge-detector. Additionally the helium jet system was used to study the properties of this isotope. The following γ rays were found to belong to the decay of 181Ir: 19.6, 65.3, 93.8, 107.6, 117.9, 123.5, 184.6, 189.9, 227.0, 231.6, 239.2, 309.0, 318.9, 350.5, 352.8, 375.2, 576.5, 700.1, 871.2, 1182.3, 1192.6, 1347.1, 1381.0, 1528.8, 1545.0, 1565.6, 1593.4, 1639.6, 1646.4, 1652.5, and 1714.9 keV. A tentative decay scheme is proposed for 181Ir, verifying levels in l8lOs that have been obtained by reaction work. The proposed decay scheme as well as spin and parity assignments of some of the 181Os levels are discussed.

Levels in 45Sc from Radiative Proton Capture in 44Ca

1974 ◽  
Vol 52 (2) ◽  
pp. 131-139 ◽  
Author(s):  
R. L. Schulte ◽  
J. D. King ◽  
H. W. Taylor
Keyword(s):  
Decay Scheme ◽  
Bound States ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Distribution Data ◽  
Excitation Energies ◽  
Proton Capture ◽  
Resonant States ◽  
Γ Rays ◽  
Γ Ray

A total of 22 resonances has been observed in the 44Ca(p,γ)45Sc reaction within the incident proton energy range of 600 to 930 keV. Gamma-ray singles spectra and γ-ray angular distribution data were accumulated for resonances at Ep = 856 and 906 keV. Both of these resonant states have been found to have spin 3/2. The measured angular distributions of primary γ rays from the resonant states have given spin information on the intermediate bound states of 45Sc with excitation energies above 2 MeV. A γ-ray decay scheme has been derived from the γ-ray spectra. The data indicate new levels at 2151.0, 3525.2, 3548.5, 3584.0, and 3714.3 keV.

Gamma rays produced in the 209Bi(n, n′γ) reaction

1984 ◽  
Vol 62 (10) ◽  
pp. 948-962 ◽  
Author(s):  
W. V. Prestwich ◽  
T. J. Kennett ◽  
J. S. Tsai
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Energy Region ◽  
Weak Coupling ◽  
Decay Scheme ◽  
High Energy ◽  
High Energy Region ◽  
Γ Rays ◽  
Γ Ray ◽  
Resolution Study

A high-resolution study of the γ-ray spectrum induced by the inelastic scattering of reactor produced neutrons has been conducted. The γ rays observed have been assigned in a decay scheme involving 134 levels extending in excitation energy to 6 MeV. The results are discussed within the context of previously identified weak coupling configurations, and possible discrepancies are indicated. Levels in the high-energy region are also compared with recently reported photoexcitation studies.

NEW LEVELS AND TRANSITIONS IN 72Ge OBSERVED IN THE 72As(β++EC)72Ge DECAY

2008 ◽  
Vol 17 (06) ◽  
pp. 1061-1074
Author(s):  
SHUIFA SHEN ◽  
YAN LI ◽  
JIAHUI GU ◽  
FURONG XU ◽  
TINGDUN WEN ◽  
...  
Keyword(s):  
High Purity ◽  
Decay Scheme ◽  
Branching Ratios ◽  
Γ Rays ◽  
Γ Ray ◽  
First Time

The decay of 72 As has been investigated by means of γ-ray spectroscopy. The 72 As nuclei were produced through the 72 Ge (p, n)72 As reaction. The Compton-suppressed spectrometer and high-purity Ge detectors have been used in singles and in coincidence modes respectively to study γ-rays in the β++ EC decay of 72 As to 72 Ge . 79 γ-rays, among which 3 were observed for the first time, were reported. A decay scheme of 72 As including 1 new level is proposed that accommodates 77 of these transitions. Tentative spin and parity assignments are suggested for a number of levels according to the log ft values and γ-branching ratios.

Properties of the 4.038 MeV state in 25Al

1968 ◽  
Vol 46 (24) ◽  
pp. 2789-2796 ◽  
Author(s):  
H. Röpke ◽  
N. Anyas-Weiss ◽  
A. E. Litherland
Keyword(s):  
Decay Scheme ◽  
Previous Measurement ◽  
Proton Scattering ◽  
Parity Assignment ◽  
Attenuation Measurement ◽  
Mixing Ratios ◽  
Doppler Shift Attenuation ◽  
Inelastic Proton Scattering ◽  
Γ Rays ◽  
Γ Ray

The 4.038 MeV state in 25Al, which is also the Ep = 1.824 MeV resonance in the 24Mg(p,γ) reaction, has been investigated using the 24Mg(p,y) reaction. The γ-ray decay scheme is given and a limit of [Formula: see text], is obtained for the inelastic proton scattering width. Angular distribution measurements of deexcitation γ rays confirm previous values of radiation mixing ratios, but cannot remove the Jπ = 9/2+, 5/2+ ambiguity in the spin–parity assignment. A Doppler shift attenuation measurement of the4.038 MeV deexcitation γ ray yields ƒ(τ) = 0.91 ± 0.02, corresponding to a lifetime of τ(4.038) = 22 ± 6 fs. The particle widths are derived using the lifetime and a previous measurement of the γ-ray yield at the 24Mg, Ep = 1.824 MeV resonance. On the basis of the particle width, arguments are given for a Jπ = 9/2+ assignment to the 4.038 MeV state.

Niederenergetische γ-Strahlung beim Einfang thermischer Neutronen in Rhodium

1962 ◽  
Vol 17 (3) ◽  
pp. 241-248 ◽  
Author(s):  
Gerd Buschhorn
Keyword(s):  
Ground State ◽  
Quartz Crystal ◽  
Diffraction Order ◽  
Low Energy ◽  
Crystal Spectrometer ◽  
Energy Level Scheme ◽  
Bent Crystal ◽  
Absolute Intensities ◽  
Γ Rays ◽  
Γ Ray

The low-energetic capture γ-ray spectrum of Rh104 was investigated by means of a 4.6 m-bent-crystal spectrometer in DUMoND-arrangement. For 39 γ-rays in the range from 20 to 400 keV, the energies and absolute intensities (relative to 100 neutron captures) were determined. An improved intensity calibration of the spectrometer showed the energy-dependence of the integrated reflection coefficient for the (101)-planes of the 3 mm thick quartz-crystal in the second diffraction order to be E-1.025±0.03 in the energy range from 100 to 470 keV.Decay-time measurements showed that besides the well known 51.4 keV-El-γ-transition, a second transition with 97.1 keV also decays with the Rh104m half-life of 4.4 min. This 97.1 keV-γ-ray corresponds to the transition from the second exited Rh104-level to the ground state. Several RITZ-combinations confirm this conclusion and improve the low-energy level-scheme of Rh104.

The radiations emitted by and its formation in the deuteron bombardment of uranium

1947 ◽  
Vol 43 (2) ◽  
pp. 267-274 ◽  
Author(s):  
N. Feather ◽  
R. S. Krishnan
Keyword(s):  
Excitation Function ◽  
Low Energy ◽  
Absorption Method ◽  
Energy Limit ◽  
Quantum Energy ◽  
Low Intensity ◽  
Deuteron Bombardment ◽  
Γ Rays ◽  
Γ Ray ◽  
Internal Absorption

The production of by deuteron bombardment of uranium has been established and the radiations of this product have been examined by the absorption method. The normal mode of disintegration involves β-particles having an upper energy limit of 1·20 ± 0·02 MeV. and a low-energy γ-ray of 76 ± 3 keV. quantum energy. Evidence has been found for electrons of less energy (about 0·1 per disintegration) and more penetrating γ-rays of relatively low intensity. Quantum radiations corresponding broadly to the L X-radiations, to be expected to follow the internal absorption of the low-energy γ-ray, have also been detected.The excitation function for the process has been studied, and the conclusion reached that the Oppenheimer-Phillips mechanism is responsible for the larger part of the yield.

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