The Decay of 151Pm to Levels in 151Sm

1973 ◽  
Vol 51 (18) ◽  
pp. 1978-1999 ◽  
Author(s):  
W. B. Cook ◽  
J. C. Waddington ◽  
D. G. Burke ◽  
D. E. Nelson
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Gamma Ray ◽  
Energy Levels ◽  
Selection Rules ◽  
Spin Parity ◽  
Coincidence Data ◽  
Parameter Configuration ◽  
Two Parameter

The energy levels of 151Sm have been investigated through a study of the decay of 28.4 h 151Pm. Singles gamma-ray spectra were obtained with high resolution Ge(Li) detectors having volumes of 0.9 and 12 cm3. Two Ge(Li) coincidence spectrometers (37 cm3 – 50 cm3 and 0.9 cm3 – 50 cm3) operated in a two-parameter configuration (4096 × 4096) were employed in collecting coincidence data. Two hundred and seventeen transitions have been incorporated into a level scheme involving 39 levels in 151Sm. On the basis of beta and gamma selection rules, spin–parity assignments have been suggested for most of the levels.

Decay of 101Mo and 101Tc

1972 ◽  
Vol 50 (17) ◽  
pp. 1957-1977 ◽  
Author(s):  
W. B. Cook ◽  
M. W. Johns
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Energy Levels ◽  
Spin Parity ◽  
Coincidence Data ◽  
Parameter Configuration ◽  
Coincidence Spectrometer ◽  
Gamma Transitions ◽  
Two Parameter

The energy levels of 101Tc and 101Ru have been investigated through a study of the decays of 14.6 min 101Mo and 14.0 min 101Tc. Singles gamma-ray spectra were obtained with high-resolution Ge(Li) detectors having volumes of 0.8 cm3 and 12 cm3. A 36 cm3 Ge(Li)–40 cm3 Ge(Li) coincidence spectrometer operated in a two-parameter configuration (4096 × 4096) was employed in collecting coincidence data. More than 180 gamma transitions have been observed in the two decays: 152 are definitely assigned to the decay of 101Mo, 25 to the decay of 101Tc. These gamma rays have been incorporated into level schemes involving 45 levels in 101Tc and 10 levels in 101Ru. On the basis of beta and gamma selection rules, spin–parity assignments have been suggested for many of the levels.

scholarly journals New Results on Excited States in the one-particle one-hole nucleus 56Co measured with MINIBALL detectors

2019 ◽  
Vol 223 ◽  
pp. 01042
Author(s):  
A. Montaner-Pizá ◽  
B. Rubio ◽  
D. Mücher ◽  
S.E.A. Orrigo ◽  
E.C. Simpson ◽  
...  
Keyword(s):  
High Resolution ◽  
Excited States ◽  
Level Scheme ◽  
Incident Energy ◽  
Angular Distributions ◽  
Spin Parity ◽  
Evaporation Reaction ◽  
The One ◽  
Large Improvement ◽  
Fusion Evaporation Reaction

The non-yrast states of the odd-odd nucleus 56Co have been investigated by studying the γ-rays induced in the predominantly fusion-evaporation reaction 56Fe(p,n γ)56Co at an incident energy of 10 MeV. The γ-rays were measured in-beam with four high-resolution MINIBALL-triple germanium (Ge) detectors. The experiment provided excellent data in γ-γ coincidences. The complex level scheme of 56Co was constructed mainly based on the analysis of these γ-γ coincidences. The angular distributions of the γ-rays were also analysed and allowed us to assign spin-parity values to most of the excited states in this nucleus. Despite the extensive work previously done studying the 56Co nucleus, the analysis presented in this work has resulted in a large improvement in the knowledge of its structure.

The Decay of 117Cd and 117Cdm

1972 ◽  
Vol 50 (17) ◽  
pp. 2012-2026 ◽  
Author(s):  
P. R. Gregory ◽  
M. W. Johns
Keyword(s):  
High Resolution ◽  
High Spin ◽  
Ground State ◽  
Energy Levels ◽  
Spin States ◽  
Β Decay ◽  
High Spin States ◽  
Coincidence Data ◽  
Weak Transitions

The energy levels of 117In have been investigated following the β decay of 3.4 h 117Cdm and 2.5 h 117Cdg. Using high resolution Ge(Li) detectors singly and in coincidence, 127γ transitions have been observed. Eighty-five of these transitions have been classified by both coincidence data and energy fit, 29 weak transitions by energy fit alone, and 12 remain unclassified. Thirty-seven levels in 117In have been established; of these, 24 are low spin states fed from the ground state and 13 are high spin states fed from the isomer. Spin and parity assignments for the newly established levels are discussed.

Studies of gamma-ray transitions in 146Eu

1976 ◽  
Vol 54 (2) ◽  
pp. 197-204 ◽  
Author(s):  
P. Sen ◽  
M. Kingman ◽  
H. Bakhru ◽  
N. Cue
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Gamma Ray ◽  
X Rays ◽  
Accurate Evaluation ◽  
X Ray ◽  
Correlation Studies ◽  
Γ Rays ◽  
Γ Ray

The decay of 146Gd to levels of 146Eu has been studied using high resolution X-ray and γ-ray detectors. γ–γ directional correlation studies, using X and γ-ray Ge(Li) detectors, were made to assign the spins of the low lying states in 146Eu. γ–γ coincidence experiments with two Ge(Li) detectors and between Eu X rays and γ rays were performed to pin down the levels of 146Eu. On the basis of these measurements, Jπ of 4−, 3−, 2−, and 1− have been assigned respectively to the ground, 115.66, 230.51, and 385.11 keV states in 146Eu. More accurate evaluation of the E2 admixtures in the M1 transitions, 114.85, 115.66, and 154.60 keV, have been obtained. Based on the above results a tentative level scheme for 146Eu has been proposed.

THE DECAY OF Pm149

1960 ◽  
Vol 38 (12) ◽  
pp. 1577-1585 ◽  
Author(s):  
Agda Artna ◽  
Margaret E. Law
Keyword(s):  
High Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Conversion Coefficient ◽  
Beta Spectrum ◽  
Multichannel Analyzer ◽  
Coincidence Spectrometer ◽  
Beta Spectrometer ◽  
Beta Group

The 52.8-hour activity of Pm149 has been investigated using a high resolution beta spectrometer, a lens type coincidence spectrometer, and a scintillation spectrometer in conjunction with a multichannel analyzer. The beta spectrum was found to consist of two groups with maximum energies of 1.072 ± 0.002 Mev and 0.786 ± 0.004 Mev, and intensities of 97.1 ± 0.4% and 2.9 ± 0.4% respectively. A gamma ray of energy 285.7 ± 0.3 kev was found to be in coincidence with the 0.786-Mev beta group. No other gamma rays with intensities greater than 0.1% were found. The K conversion coefficient for the 286-kev transition was measured to be 0.075 ± 0.008. This together with the values of 6.5 ± 0.7 and 4 ± 1 obtained for the K/L and L/M conversion ratios respectively indicate that this transition is M1 in character with less than 10% E2 admixture.

A High-Resolution Gamma-Ray Spectrometer for Use in Outer Space

1968 ◽  
Vol 15 (1) ◽  
pp. 242-251 ◽  
Author(s):  
J. Howard Marshall ◽  
Edward Halpern
Keyword(s):  
High Resolution ◽  
Gamma Ray ◽  
Outer Space ◽  
Gamma Ray Spectrometer ◽  
High Resolution Gamma

Design of a Fuel Phantom for a High-Resolution Emission Gamma Ray Tomography System Using a Pixelated CZT Detector

2020 ◽  
Author(s):  
J. Graham ◽  
S. Kilby ◽  
J. Fletcher
Keyword(s):  
High Resolution ◽  
Gamma Ray ◽  
Tomography System
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