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.

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

Study of Delayed States in 94Nb, 108Ag, and 110Ag

1971 ◽  
Vol 49 (6) ◽  
pp. 747-755 ◽  
Author(s):  
S. C. Gujrathi ◽  
J. M. d'Auria ◽  
R. G. Korteling
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Half Life ◽  
Gamma Transition ◽  
Low Energy ◽  
X Ray ◽  
Upper Limits ◽  
Energy Gamma ◽  
Gamma Transitions ◽  
First Time

The lifetimes and energies associated with low-energy gamma transitions from the 93Nb(n,γ)94Nb, 107Ag(n,γ)108Ag, and 109Ag(n,γ)110Ag reactions have been studied using a high-resolution Ge(Li) X-ray spectrometer. New weak transitions are observed in the decay of 110Ag at 30.84, 38.19, 41.78, and 136.65 keV, while intense gamma transitions at 105.6, 235.8, and 266.95 keV are resolved into doublets. The half-life of the state involving the intense 117.47 keV transition in 110Ag and the 215 keV transition in 108Ag is confirmed as 36.5 ± 2.0 ns and 54 ± 8 ns, respectively, while a new delayed state associated with the gamma transition of 99.404 keV (T1/2 = 30 ± 5 ns) in 94Nb is observed for the first time. The upper limits for the half-lives involving most of the intense transitions in all the three isotopes are also reported. A level scheme is proposed and discussed for 108Ag.

Excited fluorescence in low-Z elements by the low-energy gamma transitions and L X-rays from a 241-am XRF source

1987 ◽  
Vol 16 (3) ◽  
pp. 143-146 ◽  
Author(s):  
V. Delgado ◽  
L. González ◽  
A. López ◽  
P. Morán ◽  
E. Vañó
Keyword(s):  
Low Energy ◽  
X Rays ◽  
Energy Gamma ◽  
Gamma Transitions

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.

scholarly journals Low energy gamma-transitions in Pu{sup 238} and Pu{sup 240}

1967 ◽  
Author(s):  
G.G. Akalaev ◽  
N.A. Vartanov ◽  
P.S. Samoilov
Keyword(s):  
Low Energy ◽  
Energy Gamma ◽  
Gamma Transitions

scholarly journals Interactions of low-energy electrons with the FEBID precursor chromium hexacarbonyl (Cr(CO)6)

2017 ◽  
Vol 8 ◽  
pp. 2583-2590 ◽  
Author(s):  
Jusuf M Khreis ◽  
João Ameixa ◽  
Filipe Ferreira da Silva ◽  
Stephan Denifl
Keyword(s):  
Molecular Beam ◽  
Electron Attachment ◽  
Low Energy ◽  
Collision Induced Dissociation ◽  
Dissociative Electron Attachment ◽  
Low Energy Electrons ◽  
Singly Charged ◽  
Double Focusing ◽  
Doubly Charged ◽  
First Time

Interactions of low-energy electrons with the FEBID precursor Cr(CO)6 have been investigated in a crossed electron–molecular beam setup coupled with a double focusing mass spectrometer with reverse geometry. Dissociative electron attachment leads to the formation of a series of anions by the loss of CO ligand units. The bare chromium anion is formed by electron capture at an electron energy of about 9 eV. Metastable decays of Cr(CO)5 − into Cr(CO)4 −, Cr(CO)4 − into Cr(CO)3 − and Cr(CO)3 − into Cr(CO)2 − are discussed. Electron-induced dissociation at 70 eV impact energy was found to be in agreement with previous studies. A series of Cr(CO) n C+ (0 ≤ n ≤ 3) cations formed by C–O cleavage is described for the first time. The metastable decay of Cr(CO)6 + into Cr(CO)5 + and collision-induced dissociation leading to bare Cr+, are discussed. In addition, doubly charged cations were identified and the ration between doubly and singly charged fragments was determined and compared with previous studies, showing considerable differences.

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.

Lifetimes associated with low-energy gamma transitions in 128I and 134Cs

1969 ◽  
Vol 138 (2) ◽  
pp. 392-400 ◽  
Author(s):  
R.G. Korteling ◽  
J.M. D'auria ◽  
C.H.W. Jones ◽  
T.L. Isenhour
Keyword(s):  
Low Energy ◽  
Energy Gamma ◽  
Gamma Transitions
Sign in / Sign up

Export Citation Format

Share Document