Sum-coincidence studies in the decay of 59Fe

1976 ◽  
Vol 54 (22) ◽  
pp. 2213-2215 ◽  
Author(s):  
Lakshman Chaturvedi ◽  
Rajendra Prasad ◽  
S. N. Chaturvedi ◽  
A. K. Nigam
Keyword(s):  
Gamma Ray ◽  
Level Structure ◽  
Coincidence Technique ◽  
Coincidence Spectra

The level structure of 59Co has been examined using the sum-coincidence technique. Sum-coincidence spectra at 1482, 1434, and 1291.6 keV sum gates were recorded to establish the presence of a weak 189 keV gamma ray between the 1482 and 1291.6 keV states, which is very close to the intense 192 keV gamma ray.

Properties of low-lying states in 43Sc

1970 ◽  
Vol 48 (22) ◽  
pp. 2735-2750 ◽  
Author(s):  
G. C. Ball ◽  
J. S. Forster ◽  
F. Ingebretsen ◽  
C. F. Monahan
Keyword(s):  
Excited States ◽  
Gamma Ray ◽  
Level Structure ◽  
Surface Barrier ◽  
Angular Correlations ◽  
Mixing Ratios ◽  
Gamma Coincidence ◽  
Theoretical Predictions ◽  
Barrier Detector ◽  
Coincidence Spectra

The 40Ca(α, pγ)43Sc reaction at Eα = 11.8 to 15.5 MeV has been used to investigate the level structure of 43Sc below 4.2 MeV excitation. Level energies and decay schemes were determined from proton–gamma coincidence spectra obtained using an annular surface barrier detector positioned near 180° and two 40 cm3 Ge(Li) detectors. Angular correlations were measured in the same configuration using an array of six 12.7 × 15.2 cm NaI(Tl) detectors mounted on the Chalk River LOTUS goniometer. Twelve new levels were observed in 43Sc and information on the spins, branching ratios, and gamma-ray multipole mixing ratios of these and several other excited states has been obtained. The results are compared with recent theoretical predictions of Johnstone. In particular, levels at 1931 and 2552 keV, 1830 keV and 1883 keV have been tentatively assigned as the 9/2+ and probable 11/2+ members of the kπ = 3/2+ band, the (fp)3, Jπ = 11/2− state, and the 9/2− member of the kπ = 3/2− band, respectively.

scholarly journals Neutron capture gamma ray investigation of Sr88 level structure

1966 ◽  
Vol 194 (4) ◽  
pp. 373-394 ◽  
Author(s):  
H. Schmidt ◽  
W. Michaelis ◽  
C. Weitkamp ◽  
G. Markus
Keyword(s):  
Neutron Capture ◽  
Gamma Ray ◽  
Level Structure

Uncertainties on gamma-ray energies and intensities measured in the decay of 83Sr

2017 ◽  
Vol 26 (04) ◽  
pp. 1750017
Author(s):  
Shuifa Shen ◽  
Xiaohan Yu ◽  
Jiejie Shen ◽  
Shuanghui Shi ◽  
Jingyi Liu ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Coincidence Spectra

We analyze once again the [Formula: see text] singles spectra and [Formula: see text]-[Formula: see text]-[Formula: see text] coincidence spectra following the [Formula: see text]EC decay of 83Sr. Multipeaks are carefully separated and many [Formula: see text] transition cascades are clearly obtained in the work. As a complement to our previous work, the uncertainties on [Formula: see text]-rays energies, [Formula: see text]-rays intensities and deduced level energies in the [Formula: see text]EC decay of 83Sr are given now.

Level Structure of 171Tm

1972 ◽  
Vol 50 (6) ◽  
pp. 513-528 ◽  
Author(s):  
R. L. Graham ◽  
J. S. Geiger ◽  
M. W. Johns
Keyword(s):  
Excited States ◽  
Internal Conversion ◽  
Gamma Ray ◽  
Level Structure ◽  
Line Intensities ◽  
Gamma Coincidence ◽  
Coincidence Data ◽  
Conversion Coefficients ◽  
Beta Spectrometer

The properties of the γ-ray transitions in 171Tm, following beta decay of 7.5 h 171Er, have been studied using an iron-free π√2 beta spectrometer and Ge(Li) detectors, singly and in coincidence. The multipolarities of 8 lower-energy γ transitions have been established from a study of L- or M-subshell-internal-conversion lines. The measured K-line intensities of 20 higher-energy transitions yield K conversion coefficients and hence additional multipolarity assignments. Gamma-ray energy measurements, together with an extensive series of gamma–gamma coincidence experiments, have been used to establish the role of 59 (out of 65) γ transitions in the 171Tm level scheme. Sixteen excited states are identified at energies of 5.025 (3/2+), 116.6 (5/2+), 129.0 (7/2+), 326.7* (9/2+), 424.8 (7/2−), 635.4 (7/2+), 675.7 (3/2+), 737.2 (5/2+), 822.3* (7/2+), 912.8 (5/2+), 998.6 (7/2+), 1225.5* (3/2, 5/2, or 7/2+), 1284.7* (5/2+), 1296.3*, 1391.2*, and 1400.5* (5/2+) keV. The asterisks indicate levels which are new or at variance with those proposed by some other workers. The coincidence data does not support a level at 861 keV proposed by two other groups of workers on the basis of energy sums. Nilsson orbital assignments are proposed and discussed for 12 levels.

scholarly journals Development of a position-sensitive fast scintillator (LaBr3(Ce)) detector setup for gamma-ray imaging application

2021 ◽  
Vol 253 ◽  
pp. 11005
Author(s):  
Biswajit Das ◽  
R. Palit ◽  
R. Donthi ◽  
A. Kundu ◽  
S. R. Laskar ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Geant4 Simulation ◽  
Position Information ◽  
Coincidence Technique ◽  
Imaging Application ◽  
Gamma Ray Imaging ◽  
Position Sensitive ◽  
Set Up ◽  
Detector Crystal

We have characterized a Cerium doped Lanthanum Bromide (LaBr3(Ce) ) crystal coupled with the position-sensitive photo-multiplier system for the gamma-ray imaging application. One can use this detector set-up for the scanning of high purity germanium detectors for pulse shape analysis in gamma-ray spectroscopy experiments and the image formation of an object by Compton back-scattering . The sensor has been tested for energy, timing and position information of the gamma-rays interacting within the detector crystal. The GEANT4 simulation results are consistent with the experimental results. We have reconstructed the image of irradiation spots in different positions throughout the detector crystal. Position resolution is found to be around 3.5 mm with the 2 mm collimated gamma-rays. The 2-d image of hexagonal Bismuth Germanate (BGO) crystal and a cylindrical LaBr3(Ce) crystal have been reconstructed in coincidence technique. The performance of the detector for imaging application has been investigated by coincidence technique in GEANT4 simulation and compared with the experimental data. We have reconstructed the 2-d images of objects with various geometrical shapes by Compton back-scattered events of the gamma-rays. This position-sensitive detector can be used as an absorber of a Compton camera for the image reconstruction of an extended radioactive source. One can also use this kind of set-up as in radiation imaging and many other applications where the energy and source position of the gamma-ray is the main interest.

14.—Ground State Rotational Bands in 158Dy, 160Dy and 162Dy

1972 ◽  
Vol 70 ◽  
pp. 155-163 ◽  
Author(s):  
G. T. Ewan ◽  
G. I. Andersson
Keyword(s):  
Gamma Rays ◽  
Ground State ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Rotational Bands ◽  
Weak Evidence ◽  
Gamma Coincidence ◽  
Inertia Model ◽  
Coincidence Spectra ◽  
Variable Moment

SynopsisLevels in the ground state bands of 158Dy, 160Dy and 162Dy have been populated by (α, 2n) reactions on metallic targets of separated 156Gd, 158Gd and 160Gd isotopes. Two Ge(Li) detectors were used to study singles gamma-ray spectra, gamma-ray angular distributions, gamma-gamma coincidence spectra and relative yields of gamma-rays for bombarding energies from 20 to 27 MeV. Transitions from all levels in the ground state bands up to the 12+ member were identified and the following level energies in keV established: 158Dy: 0 (0+), 99·0 (2+), 317·4 (4+), 637·9 (6+), 1044·1 (8+), 1520·1 (10+) and 2049·4 (12+); 160Dy: 0 (0+), 86·7 (2+), 283·7 (4+), 581·4 (6+), 967·4 (8+), 1429·0 (10+), 1951·7 (12+); 162Dy: 0 (0+), 80·7 (2+), 265·7 (4+), 548·5 (6+), 921·1 (8+), 1374·8 (10+) and 1901·0 (12+). There is weak evidence for the 14+ levels in 158Dy and 160Dy. The level energies are compared with calculated values using the variable moment of inertia model.

Neutron-Capture Gamma-Ray Studies of the Level Structure of theTe124Nucleus

1969 ◽  
Vol 179 (4) ◽  
pp. 1113-1133 ◽  
Author(s):  
D. L. Bushnell ◽  
R. P. Chaturvedi ◽  
R. K. Smither
Keyword(s):  
Neutron Capture ◽  
Gamma Ray ◽  
Level Structure

THE LEVEL STRUCTURE OF 104Rh OBSERVED IN THERMAL NEUTRON CAPTURE

1966 ◽  
Vol 44 (9) ◽  
pp. 2041-2051 ◽  
Author(s):  
L. B. Hughes ◽  
T. J. Kennett ◽  
W. V. Prestwich
Keyword(s):  
Energy Range ◽  
Thermal Neutron ◽  
Neutron Capture ◽  
Gamma Ray ◽  
Level Structure ◽  
Neutron Separation Energy ◽  
Thermal Neutron Capture ◽  
Separation Energy

The capture gamma-ray spectrum of the reaction 103Rh(n, γ)104Rh has been studied using a Ge(Li) spectrometer. The energy range covered was from 3 600 to 7 500 keV with an average resolution of 12 keV. A total of 100 transitions were observed and the neutron separation energy was found to be 6 999 ± 3 keV.

Gamma-ray spectrum from 182Ta decay and the level structure of 182W

1969 ◽  
Vol 136 (3) ◽  
pp. 657-662 ◽  
Author(s):  
D.H. White ◽  
R.E. Birkett
Keyword(s):  
Gamma Ray ◽  
Level Structure
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