Thermal neutron capture γ-ray spectrum of lanthanum

1990 ◽  
Vol 68 (11) ◽  
pp. 1237-1242 ◽  
Author(s):  
M. A. Islam ◽  
T. J. Kennett ◽  
W. V. Prestwich
Keyword(s):  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Nuclear Reactor ◽  
Level Density ◽  
Strength Function ◽  
Thermal Neutron Capture ◽  
Resonance Model ◽  
Dipole Resonance ◽  
Nuclear Temperature

The thermal neutron capture gamma rays from the reaction 139La(n, γ)140La were investigated using a pair spectrometer and the tangential facility at the McMaster University Nuclear Reactor. A large number of previously unreported transitions have been observed from which details of the 140La structure are inferred. The level density is found to be consistent with a statistical model encompassing nuclear temperature. The reduced E1 strength function of 140La was found to be (1.4 ± 0.4) × 10−9 MeV−3. The giant dipole resonance model seems to overestimate the E1 strength in this nucleus. The separation energy of 140La is found to be 5161.00 ± 0.05 keV.

Thermal-neutron capture gamma rays from the 27Al(n, γ)28Al reaction

1969 ◽  
Vol 126 (2) ◽  
pp. 392-400 ◽  
Author(s):  
R. Hardell ◽  
S.O. Idetjärn ◽  
H. Ahlgren
Keyword(s):  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Thermal Neutron Capture

Thermal neutron capture gamma rays from sulfur isotopes: Experiment and theory

1985 ◽  
Vol 32 (1) ◽  
pp. 18-69 ◽  
Author(s):  
S. Raman ◽  
R. F. Carlton ◽  
J. C. Wells ◽  
E. T. Jurney ◽  
J. E. Lynn
Keyword(s):  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Sulfur Isotopes ◽  
Thermal Neutron Capture

Energy levels ofCm249from measurements of thermal neutron capture gamma rays

1982 ◽  
Vol 25 (5) ◽  
pp. 2232-2254 ◽  
Author(s):  
R. W. Hoff ◽  
W. F. Davidson ◽  
D. D. Warner ◽  
H. G. Börner ◽  
T. von Egidy
Keyword(s):  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Energy Levels ◽  
Thermal Neutron Capture

PHOTON STRENGTH FUNCTIONS OF 160Tb FROM THE TWO-STEP GAMMA CASCADE MEASUREMENT

2011 ◽  
Vol 20 (02) ◽  
pp. 526-531 ◽  
Author(s):  
JIŘÍ KROLL ◽  
FRANTIŠEK BEČVÁŘ ◽  
MILAN KRTIČKA ◽  
IVO TOMANDL
Keyword(s):  
Statistical Model ◽  
Thermal Neutron ◽  
Neutron Capture ◽  
Crucial Role ◽  
Vibrational Mode ◽  
Level Density ◽  
Thermal Neutron Capture ◽  
Cascade Decay ◽  
Scissors Mode ◽  
Strength Functions

Spectra of two-step γ cascades (TSCs) following thermal neutron capture in 159 Tb were measured. In order to obtain information about the quantities governing the γ decay of 160 Tb - the photon strength functions and the level density - the experimental TSC spectra were compared with the outcome of simulations of the γ cascade decay based on the validity of the extreme statistical model. The results obtained lead to an inescapable conclusion that the M1 scissors vibrational mode plays a crucial role in the cascade γ decay of the product nucleus 160 Tb . This finding represents the first evidence for the existence of the scissors mode in an odd-odd nucleus.

Gamma Rays from Thermal Neutron Capture in Cl, V, Mn, and Co

1964 ◽  
Vol 136 (6B) ◽  
pp. B1640-B1653 ◽  
Author(s):  
O. A. Wasson ◽  
K. J. Wetzel ◽  
C. K. Bockelman
Keyword(s):  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Thermal Neutron Capture

Thermal neutron capture γ-ray spectrum of molybdenum and ruthenium

1991 ◽  
Vol 69 (6) ◽  
pp. 658-664 ◽  
Author(s):  
M. A. Islam ◽  
T. J. Kennett ◽  
W. V. Prestwich
Keyword(s):  
Thermal Neutron ◽  
Neutron Capture ◽  
Nuclear Reactor ◽  
Thermal Neutron Capture ◽  
Global Average ◽  
Transition Level ◽  
Γ Rays ◽  
Γ Ray ◽  
Strength Functions ◽  
Mcmaster University

The thermal neutron capture γ rays from natural molybdenum and ruthenium have been studied using a pair spectrometer and the tangential facility at the McMaster University Nuclear Reactor. Precise transition, level, and neutron separation energies of different isotopes are inferred. The separation energies are: Sn(93Mo) = 8069.76 ± 0.09, Sn(95Mo) = 7369.10 ± 0.10, Sn(96Mo) = 9154.31 ± 0.05, Sn(97Mo) = 6821.15 ± 0.25, Sn(98Mo) = 8642.55 ± 0.07, Sn(99Mo) = 5925.42 ± 0.15, Sn(100Ru) = 9673.48 ± 0.05, and Sn(102Ru) = 9219.64 ± 0.05 keV. The M1 strength functions of 100Ru,102Ru, 96Mo, and 98Mo are (34 ± 15) × 10−9, (82 ± 41) × 10−9, (22 ± 7) × 10−9, and (25 ± 8) × 10−9 MeV−3, respectively. All values but that for 102Ru agree with the global average of (20 ± 6) × 10−9 MeV−3. The average [Formula: see text] of 96Mo observed is 247 ± 175 e2 fm4 MeV−1.

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