scholarly journals Neutrons Emitted in the Disintegration of Beryllium by Deuterons

1953 ◽  
Vol 6 (1) ◽  
pp. 45 ◽  
Author(s):  
AJ Dyer ◽  
JR Bird
Keyword(s):  
Energy Level ◽  
Ground State ◽  
State Transition ◽  
Photographic Plate ◽  
Energy Levels ◽  
Ground State Transition ◽  
Q Value ◽  
Plate Technique ◽  
Additional Group ◽  
Beryllium Target

Neutrons obtained by bombarding a thick beryllium target with 600 keV. deuterons were studied by the photographic plate technique at angles of emission of 0, 90, and 150�. Five previously reported neutron groups were confirmed giving energy levels of B10 at 0?73,1?75,2�20, and 3�64 MeV. An additional group corresponding to an energy level of 2�85 MeV. was observed and the evidence for regarding these as genuine beryllium neutrons is discussed. The Q-value for the ground state transition is found to be 4�35�0�02MeV. which agrees with the value 4�36�0�04 deduced from the most recent masses.

A Study of Levels in 149Nd using the (d, t) and (3He, α) Reactions

1973 ◽  
Vol 51 (4) ◽  
pp. 455-464 ◽  
Author(s):  
D. G. Burke ◽  
J. C. Waddington ◽  
D. E. Nelson ◽  
J. Buckley
Keyword(s):  
Cross Sections ◽  
Ground State ◽  
State Transition ◽  
Angular Distributions ◽  
Ground State Transition ◽  
Reaction Products ◽  
Q Value ◽  
Nilsson Model ◽  
Photographic Emulsions ◽  
Peak Widths

Triton spectra from the 150Nd(d, t)149Nd reaction have been measured at 15 angles using beams of 12 MeV deuterons. The 150Nd(3He, α)149Nd reaction was studied at four angles with 24 MeV 3He beams. In all cases the reaction products were analyzed with an Enge-type magnetic spectrograph and detected with photographic emulsions. The peak widths (FWHM) were approximately 8 keV for the (d, t) studies and 25 keV for the (3He, α) spectra. It is now evident that the highest energy triton group ascribed to the 150Nd(d, t)149Nd reaction in previous works does not correspond to the ground state transition. According to the current interpretation the ground state transition has a Q value of −1.122 ± 0.010 MeV. The (d, t) angular distributions and the ratios of (3He, α) and (d, t) cross sections at selected angles were used to determine l values for a number of the transitions. Three states in 149Nd at 481, 813, and 986 keV are definitely populated by l = 0 transitions and thus have Iπ = 1/2+. A strongly perturbed band consisting of a mixture of Nilsson states from the i13/2 shell has been found, with properties similar to the corresponding bands in the isotones 151Sm and 153Gd. The total observed intensity for each of the l values 0, 1, 2, and 6 cannot be explained by the extreme single-particle shell model but is consistent with that predicted by the Nilsson model. However, the splitting of the strength among the observed states cannot be explained by the basic Nilsson model.

scholarly journals Laser spectroscopy of the 1001-nm ground-state transition in dysprosium

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
D. Studer ◽  
L. Maske ◽  
P. Windpassinger ◽  
K. Wendt
Keyword(s):  
Laser Spectroscopy ◽  
Ground State ◽  
State Transition ◽  
Ground State Transition

scholarly journals Measurement of the 2+→0+ ground-state transition in the β decay of F20

2019 ◽  
Vol 100 (6) ◽  
Author(s):  
O. S. Kirsebom ◽  
M. Hukkanen ◽  
A. Kankainen ◽  
W. H. Trzaska ◽  
D. F. Strömberg ◽  
...  
Keyword(s):  
Ground State ◽  
State Transition ◽  
Ground State Transition ◽  
Β Decay

scholarly journals Multipolarity of the2−→1−, ground-state transition inBi210via multivariable angular correlation analysis

2016 ◽  
Vol 94 (1) ◽  
Author(s):  
N. Cieplicka-Oryńczak ◽  
B. Szpak ◽  
S. Leoni ◽  
B. Fornal ◽  
D. Bazzacco ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Angular Correlation ◽  
Ground State ◽  
State Transition ◽  
Ground State Transition

Conduction band offset for Ga0.62In0.38NxAs0.991−xSb0.009∕GaNyAs1−y∕GaAs systems with the ground state transition at 1.5–1.65μm

2007 ◽  
Vol 90 (13) ◽  
pp. 131905 ◽  
Author(s):  
R. Kudrawiec ◽  
S. R. Bank ◽  
H. B. Yuen ◽  
H. Bae ◽  
M. A. Wistey ◽  
...  
Keyword(s):  
Conduction Band ◽  
Ground State ◽  
State Transition ◽  
Band Offset ◽  
Ground State Transition ◽  
Conduction Band Offset

LIFETIME MEASUREMENTS OF STATES IN O18 AND Ne22

1964 ◽  
Vol 42 (6) ◽  
pp. 1311-1323 ◽  
Author(s):  
M. A. Eswaran ◽  
C. Broude
Keyword(s):  
Excited State ◽  
Ground State ◽  
Doppler Shift ◽  
State Transition ◽  
Branching Ratios ◽  
Ground State Transition ◽  
Lifetime Measurements ◽  
Doppler Shift Attenuation ◽  
First Excited State ◽  
Doppler Shift Attenuation Method

Lifetime measurements have been made by the Doppler-shift attenuation method for the 1.98-, 3.63-, 3.92-, and 4.45-Mev states in O18 and the 1.28-, 3.34-, and 4.47-Mev states in Ne22, excited by the reactions Li7(C12, pγ)O18 and Li7(O16, pγ)Ne22. Branching ratios have also been measured. The results are tabulated.[Formula: see text]The decay of the 3.92-Mev state in O18 is 93.5% to the 1.98-Mev state and 6.5% to the ground state and of the 4.45-Mev state 74% to the 3.63-Mev state, 26% to the 1.98-Mev state, and less than 2% to the ground state. In Ne22, the ground-state transition from the 4.47-Mev state is less than 2% of the decay to the first excited state.

Ground-State Transition Width of the 7.297-MeV Level inPb208

1966 ◽  
Vol 145 (3) ◽  
pp. 982-987 ◽  
Author(s):  
E. J. Dowdy ◽  
J. A. McIntyre
Keyword(s):  
Ground State ◽  
State Transition ◽  
Ground State Transition ◽  
Transition Width

Beam-Maser Measurements of the Ground-State Transition Frequencies of OH.

1972 ◽  
Vol 172 ◽  
pp. L21 ◽  
Author(s):  
J. J. Ter Meulen ◽  
A. Dymanus
Keyword(s):  
Ground State ◽  
State Transition ◽  
Ground State Transition ◽  
Beam Maser

scholarly journals Radio Observations of Molecules in Nearby Galaxies

1978 ◽  
Vol 77 ◽  
pp. 131-137
Author(s):  
J.B. Whiteoak
Keyword(s):  
Ground State ◽  
High Intensity ◽  
Molecular Cloud ◽  
State Transition ◽  
Magellanic Clouds ◽  
Radio Continuum ◽  
Ground State Transition ◽  
Distant Galaxies ◽  
Nearby Galaxies ◽  
Cas A

The observation in 1965 of absorption due to the 18 cm ground-state transition of OH in the direction of Cas A (Weinreb et al., 1963) marked the first occasion on which a molecular cloud was detected at radio wavelengths. However, it was not until the later discovery of high-intensity OH emission (Weaver et al., 1965) that attention turned to nearby galaxies. Unfortunately, searches for OH emission in the Magellanic Clouds (McGee et al., 1965; Radhakrishnan, 1967) and in more distant galaxies (Roberts, 1967) were unsuccessful. The first detection of an OH transition, in absorption against the radio continuum of NGC 253 and 3034 (Weliachew, 1971), went almost unnoticed because the results were unconvincing. However, Whiteoak and Gardner (1973) and Nguyen-Q-Rieu et al. (1976) confirmed the existence of the absorption.

Sign in / Sign up

Export Citation Format

Share Document