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.

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.

scholarly journals Level studies of 73As via 73Ge(p, nγ)73As reaction and density of discrete levels in 73As

2009 ◽  
Vol 24 (2) ◽  
pp. 82-85 ◽  
Author(s):  
Aziz Behkami ◽  
Rohallah Razavi ◽  
Tayeb Kakavand
Keyword(s):  
Proton Beam ◽  
Excited States ◽  
Level Scheme ◽  
Level Density ◽  
Fermi Gas ◽  
Temperature Model ◽  
Nuclear Level Density ◽  
Nuclear Level ◽  
Level Densities ◽  
Experimental Level

The excited states of 73As have been investigated via the 73Ge(p, n?)73As reaction with the proton beam energies from 2.5-4.3 MeV. The parameters of the nuclear level density formula have been determined from the extensive and complete level scheme for 73As. The Bethe formula for the back-shifted Fermi gas model and the constant temperature model are compared with the experimental level densities.

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.

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.

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 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

Gamma transitions in the decay of 75Se

1977 ◽  
Vol 55 (22) ◽  
pp. 2036-2039 ◽  
Author(s):  
Rajendra Prasad
Keyword(s):  
Gamma Rays ◽  
Level Scheme ◽  
Coincidence Circuit ◽  
Coincidence Spectrometer ◽  
Gamma Transitions

Gamma transitions following the decay of 75Se have been studied using a Ge(Li) detector and a NaI(Tl)–NaI(Tl) sum-coincidence spectrometer, used in conjunction with a slow-fast coincidence circuit. Two new gamma rays of energy 373.5 and 556.4 keV have been observed and confirmed in the level scheme of 75As. Ambiguous gamma transitions of 249.2, 468.6, 542.2, and 821.6 keV energies have also been confirmed. No evidence was found for the existence of 269.0, 293.0, and 308.0 keV transitions. The accurate intensities for various transitions have been determined.

scholarly journals Level studies of 93Mo via 93Nb(p, nγ)93Mo reaction and density of discrete levels in 93Mo

2011 ◽  
Vol 26 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Rohallah Razavi ◽  
Tayeb Kakavand
Keyword(s):  
Proton Beam ◽  
Excited States ◽  
Level Scheme ◽  
Level Density ◽  
Fermi Gas ◽  
Temperature Model ◽  
Nuclear Level Density ◽  
Nuclear Level ◽  
Level Densities ◽  
Experimental Level

The excited states of 93Mo have been investigated via the 93Nb(P,n?)93Mo reaction with proton beam energies of 2.5-4.3 MeV. The parameters of the nuclear level density formula were determined from the extensive and complete level scheme of 93Mo. The Bethe formula for the back-shifted Fermi gas model and the constant temperature model are compared with experimental level densities.

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.

Sign in / Sign up

Export Citation Format

Share Document