Updated level scheme of 172 Yb from 171 Yb(nth, γ ) reaction studied via gamma–gamma coincidence spectrometer

2017 ◽  
Vol 964 ◽  
pp. 55-68 ◽  
Author(s):  
Ngoc Anh Nguyen ◽  
Xuan Hai Nguyen ◽  
Dinh Khang Pham ◽  
Quang Hung Nguyen ◽  
Huu Thang Ho
Keyword(s):  
Level Scheme ◽  
Gamma Coincidence ◽  
Coincidence Spectrometer

scholarly journals First results in the study of level scheme for ¹⁷²Yb based on gamma-gamma coincidence spectrometer

2016 ◽  
Vol 6 (4) ◽  
pp. 26-31
Author(s):  
Ngoc Anh Nguyen ◽  
Xuan Hai Nguyen ◽  
Dinh Khang Pham ◽  
Huu Thang Ho
Keyword(s):  
Level Scheme ◽  
Level Density ◽  
Strength Function ◽  
Nuclear Research ◽  
Nuclear Level Density ◽  
Nuclear Level ◽  
Nuclear Research Institute ◽  
Gamma Coincidence ◽  
First Results ◽  
Coincidence Spectrometer

Nuclear level scheme permits to determine nuclear level density, gamma strength function, and to evaluate nuclear models. In comparison to light nuclei, the structure of heavy nuclei is much more complicated because of their strong deformation. In order to study nuclear level scheme, gamma – gamma coincidence spectrometer with advantages of low Compton background and the ability of identifying correlated gamma transitionshas been often used. This paper presents the first results of an experimentalstudy of level scheme of 172Yb using gamma – gamma coincidence spectrometer at the Dalat Nuclear Research Institute.

scholarly journals An algorithms to improve the energy resolution of two-step cascade spectrum

2020 ◽  
Vol 4 (4) ◽  
pp. First
Author(s):  
Nguyen Ngoc Anh ◽  
Nguyen Xuan Hai ◽  
Hồ Hữu Thắng ◽  
Phan Bao Quoc Hieu ◽  
Truong Van Minh
Keyword(s):  
Energy Resolution ◽  
Spectrum Analysis ◽  
Nuclear Research ◽  
Final States ◽  
Nuclear Research Institute ◽  
Peak Deconvolution ◽  
Compound State ◽  
Gamma Spectrum Analysis ◽  
Gamma Coincidence ◽  
Coincidence Spectrometer

The present paper proposes an algorithm to improve the energy resolution of two-step cascade spectrum. The energy resolution plays an important role in the domain of gamma spectrum analysis. The better the energy resolution is, the better the ability of peak resolving is. The algorithm is constructed based on an analyze of energy resolution of the summation amplitude of coincident pulses spectrometer using the analogue technique. The algorithm proposed has been tested on some two-step cascade spectra of 164Dy nucleus obtained from the (n, ) reaction experiment using the gamma – gamma coincidence spectrometer at Dalat Nuclear Research Institute. Two-step cascade spectra corresponding to the cascade decays from the compound state to final states whose energies are 0, 74, and 242 keV have been evaluated. The results obtained show that the energy resolution of the two-step cascade spectrum has been reduced by 1.05 to 2.04 times within the energy range of 586 to 6830 keV. Our algorithm can therefore be applied to improve the ability of peak deconvolution, the accuracy, and the realibility in analyzing two-step cascade spectra.

scholarly journals The Decay of 147Nd

1974 ◽  
Vol 27 (6) ◽  
pp. 869 ◽  
Author(s):  
C Rangacharyulu ◽  
SN Chaturvedi ◽  
GK Mehta ◽  
N Nath
Keyword(s):  
High Resolution ◽  
Level Scheme ◽  
Conclusive Evidence ◽  
Coincidence Spectrometer ◽  
Experimental Level

An experimental level scheme has been determined for 147Pm from an investigation of the decay of 147Nd which employed a high resolution Ge(Li) detector and a sum-coincidence spectrometer with fast-slow coincidence. Conclusive evidence is presented for the existence of levels in 147Pm at 182,228�5,275,319�5 and 725 keY besides the six already established levels, while no evidence is found for another six levels suggested by some earlier workers. Thirty-two y-ray transitions and their cascade relations have been established, and relative intensities have been determined for most of the transitions.

STUDIES IN THE ACTIVE DEPOSIT OF ACTINIUM: PART II: THE DECAY OF 211Pb (AcB)

1965 ◽  
Vol 43 (3) ◽  
pp. 383-403 ◽  
Author(s):  
C. R. Cothern ◽  
R. D. Connor
Keyword(s):  
Gamma Rays ◽  
Level Scheme ◽  
Gamma Ray ◽  
Ground Level ◽  
Conversion Line ◽  
Point Energy ◽  
Correlation Studies ◽  
Absolute Intensities ◽  
Gamma Coincidence ◽  
Conversion Coefficients

Studies of the active deposit of actinium using a Siegbahn–Slatis beta-ray spectrometer and scintillation counters together with gamma–gamma coincidence work and gamma–gamma angular correlation measurements have led to the establishment of a new decay scheme for 211Pb and a level scheme for 211Bi involving five excited states.The gamma rays have the following energies and absolute intensities:[Formula: see text]Conversion-line studies yielded energy values for the transitions marked with an asterisk as 403.3 ± 0.5 and 426.5 ± 0.5 keV respectively. The K conversion coefficients of the 400- and 430-keV transitions have been determined as 0.091 ± 0.018 and 0.117 ± 0.024 respectively.Fermi analysis yields 1.378 MeV as the highest end-point energy of the beta partial spectra. The remaining end points and the component intensities as deduced from the level scheme are as follows:[Formula: see text]The much less accurate results from Fermi analysis of the complete active deposit are in reasonable agreement with these data.Angular correlation studies of the 430–400- and 706–400-keV gamma-ray cascades have yielded spins for the levels concerned: ground level (9/2), 400-keV level (7/2), 830-keV level (9/2), and 1 100-keV level (7/2). These spins are the only ones consistent with the experimental evidence and the theoretical arguments presented.

Levels in 89Rb Populated by the Beta Decay of 89Kr

1972 ◽  
Vol 50 (22) ◽  
pp. 2741-2752 ◽  
Author(s):  
W. F. S. Poehlman ◽  
B. Singh ◽  
M. W. Johns
Keyword(s):  
Excited States ◽  
Beta Decay ◽  
Gamma Rays ◽  
Large Volume ◽  
Ground State ◽  
Level Scheme ◽  
Gamma Coincidence ◽  
Coincidence Data ◽  
Coincidence Arrangement

The decay of 3.2 min 89Kr has been investigated with small and large volume Ge(Li) detectors used singly and in a dual parameter coincidence arrangement. A total of 162 gamma rays are identified with the decay of this isotope, 120 of which are placed in a level scheme on the basis of gamma–gamma coincidence evidence and the energy differences between established levels. Levels at 220.9, 497.7, 577.3, 586.1, 930.7, 931.5, 997.6, 1195.5, 1324.6, 1530.1, 1533.6, 1694.1, 1822.1, 1998.9, 2160.5, 2401.5, 2598.5, 2867.2, 3099.7, 3329.9, 3363.1, 3372.1, 3534.1, 3719.3, 4145.1, 4217.4, 4340.9, and 4487.5 keV are well established by coincidence data and many energy sums. The levels proposed at 2783.4, 3429.7, 3456.6, 3978.4, 4058.4, and 4406.5 keV are less securely established. The most probable spins of the ground state and the first two excited states arc 3/2−. 5/2− and 1/2− respectively. Improved energies and intensities of the gamma rays from the decay of 15 min 89Rb have also been determined.

Configuration of an alpha–gamma coincidence spectrometer for utilization of safeguards measurements

2009 ◽  
Vol 67 (12) ◽  
pp. 2088-2091 ◽  
Author(s):  
Katharina Breitenecker ◽  
David Donohue ◽  
Hugo Eisenwagner ◽  
Andrew P. Maddison ◽  
Herbert Siegmund
Keyword(s):  
Gamma Coincidence ◽  
Coincidence Spectrometer ◽  
Safeguards Measurements

scholarly journals Erratum: Level scheme of Sm153 obtained from the Sm152(nth,γ) reaction using a γ−γ coincidence spectrometer [Phys. Rev. C 100 , 024324 (2019)]

2020 ◽  
Vol 102 (1) ◽  
Author(s):  
Nguyen Ngoc Anh ◽  
Nguyen Quang Hung ◽  
Nguyen Xuan Hai ◽  
Pham Dinh Khang ◽  
A. M. Sukhovoj ◽  
...  
Keyword(s):  
Level Scheme ◽  
Coincidence Spectrometer
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