THE 51V(n, γ)52V REACTION

1967 ◽  
Vol 45 (8) ◽  
pp. 2683-2694 ◽  
Author(s):  
N. P. Archer ◽  
T. J. Kennett
Keyword(s):  
Gamma Radiation ◽  
Thermal Neutron ◽  
Ground State ◽  
Neutron Capture ◽  
Decay Scheme ◽  
Thermal Neutron Capture ◽  
Separation Energy ◽  
Direct Capture ◽  
Coincidence Measurements

The gamma radiation following thermal neutron capture by vanadium has been studied using a Ge(Li) detector. A separation energy of 7 311 ± 2 keV was determined and the ground-state triplet was observed, confirming levels of 17 and 23 keV. Coincidence measurements were used to assist in the construction of a decay scheme which includes 97% of the total observed intensity. The agreement with (d, p) measurements is very good and permits one to conclude that essentially all of the observed transitions are E1. The lack of any correlation between reduced radiation widths and stripping strengths suggests the absence of direct capture.

A STUDY OF THE GAMMA RADIATION FOLLOWING THERMAL NEUTRON CAPTURE BY SILICON

1967 ◽  
Vol 45 (5) ◽  
pp. 1871-1884 ◽  
Author(s):  
H. Lycklama ◽  
L. B. Hughes ◽  
T. J. Kennett
Keyword(s):  
Gamma Radiation ◽  
Thermal Neutron ◽  
Single Particle ◽  
Neutron Capture ◽  
Decay Scheme ◽  
Time Correlation ◽  
Neutron Separation Energy ◽  
Thermal Neutron Capture ◽  
Separation Energy

A study of the gamma radiation following thermal neutron capture by natural silicon has been conducted. Precise energy measurements were obtained using a Ge(Li) counter and a decay scheme was constructed using the time correlation results obtained with a Ge(Li)–NaI(Tl) spectrometer. The neutron separation energy was found to be 8 474 ± 1 keV for 29Si. An examination of the reduced radiation widths revealed that, while E1 and E2 radiation agreed well with the single-particle estimate, the M1 strength was hindered by a factor of from 10 to 100.

A study of the 23Na(n,γ)24Na and 27Al(n,γ)28Al reactions

1969 ◽  
Vol 47 (9) ◽  
pp. 953-961 ◽  
Author(s):  
L. W. Nichol ◽  
A. H. Colenbrander ◽  
T. J. Kennett
Keyword(s):  
Gamma Radiation ◽  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Decay Scheme ◽  
Thermal Neutron Capture

A study of the gamma radiation following thermal-neutron capture by natural sodium and aluminum has been conducted using a Ge(Li) spectrometer. For sodium, 68 gamma rays were observed and their intensities and energies determined; for aluminum, 85 gamma rays were identified. A decay scheme for aluminum has been proposed from the present measurements. The neutron separation energies were found to be 6960.3 ± 1.5 keV for sodium and 7725.5 ± 1.5 keV for aluminum. The lifetime of the 472-keV level in sodium was measured to be 20.5 ± 0.5 ms using a chopped beam of neutrons.

A Study of Thermal Neutron Capture in Aluminum

1972 ◽  
Vol 50 (22) ◽  
pp. 2845-2855 ◽  
Author(s):  
A. F. M. Ishaq ◽  
A. H. Colenbrander ◽  
T. J. Kennett
Keyword(s):  
Thermal Neutron ◽  
Neutron Capture ◽  
Decay Scheme ◽  
Gamma Ray ◽  
Thermal Neutron Capture ◽  
Q Value ◽  
The Mean

The gamma-ray spectrum following thermal neutron capture in aluminum has been studied using a Ge(Li) pair spectrometer. A total of 143 transitions has been observed above 2.1 MeV, and most of these have been placed in a decay scheme. Some 51 levels in 28Al are observed to be populated in the reaction. The Q value for the 27Al(n,γ)28Al reaction is estimated to be 7725.4 ± 0.5 keV, and the multiplicity is found to be 2.0. The mean relative strengths of primary E1 and M1 transitions have been calculated and an attempt has been made to use these to determine the multipolarities of primary transitions leading to levels of unknown parity.

Study of thermal neutron capture in potassium

1970 ◽  
Vol 48 (10) ◽  
pp. 1109-1129 ◽  
Author(s):  
L. V. Johnson ◽  
T. J. Kennett
Keyword(s):  
Thermal Neutron ◽  
Excited States ◽  
Neutron Capture ◽  
Decay Scheme ◽  
Gamma Ray ◽  
Branching Ratios ◽  
Experimental Results ◽  
Thermal Neutron Capture ◽  
Gamma Coincidence

The 39K(n,γ)40K reaction has been studied using a Ge(Li) and a Ge(Li)–Ge(Li) spectrometer. A total of 252 gamma-ray transitions has been observed and a gamma–gamma coincidence matrix involving 62 transitions has been established. A decay scheme based on the experimental results is deduced for 202 of the observed gamma-ray transitions. Spins and parities of some excited states have been estimated from the deduced branching ratios. The neutron separation energies of the 40K and 42K nuclei have been determined as 7800.5 ± 0.2 and 7535.2 ± 1.5 keV respectively.

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.

scholarly journals Radiative thermal neutron-capture cross sections for theW180(n,γ)reaction and determination of the neutron-separation energy

2015 ◽  
Vol 92 (3) ◽  
Author(s):  
A. M. Hurst ◽  
R. B. Firestone ◽  
L. Szentmiklósi ◽  
B. W. Sleaford ◽  
M. S. Basunia ◽  
...  
Keyword(s):  
Thermal Neutron ◽  
Cross Sections ◽  
Neutron Capture ◽  
Neutron Separation Energy ◽  
Thermal Neutron Capture ◽  
Capture Cross ◽  
Separation Energy ◽  
Capture Cross Sections

A Study of Thermal Neutron Capture in Chlorine

1972 ◽  
Vol 50 (24) ◽  
pp. 3090-3099 ◽  
Author(s):  
A. F. M. Ishaq ◽  
T. J. Kennett
Keyword(s):  
Thermal Neutron ◽  
Neutron Capture ◽  
Decay Scheme ◽  
Gamma Ray ◽  
Thermal Neutron Capture ◽  
Q Value ◽  
The Mean

The gamma-ray spectrum after thermal neutron capture has been studied using a Ge(Li) pair spectrometer. Out of 140 transitions observed above 1.95 MeV, 3 have been tentatively assigned to 38Cl and the rest to 36Cl. An improved decay scheme is proposed for 36Cl which involves 43 levels. The Q value for the 35Cl(n,γ)36Cl reaction is estimated to be 8579.1 ± 0.5 keV and the multiplicity of the reaction found to be 2.5. A tentative estimate of the Q value for the 37Cl(n,γ)38Cl reaction yielded a result of 6107.4 ± 0.8 keV. The mean reduced widths for primary dipole transitions have been calculated and compared with theoretical estimates.

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