Investigation of level properties of 139La

1979 ◽  
Vol 57 (11) ◽  
pp. 1940-1948 ◽  
Author(s):  
R. G. Kulkarni ◽  
K. Andhradev
Keyword(s):  
Angular Distribution ◽  
Excited States ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Theoretical Calculations ◽  
Angular Distributions

The excited states of 139La up to 1800 keV were studied by means of Coulomb excitation of 139La with protons varying in energy from 4.0 to 5.5 eV. The gamma-ray yields and angular distributions were measured with a Ge(Li) detector. The levels at 1715.0 and 1767.2 keV were Coulomb excited newly. The results of gamma-ray angular distribution measurements establish spin values of 3/2+, 9/2+, 7/2+, 5/2+, and 3/2+ for the 830, 1219.1, 1536.3, 1715.0, and 1767.2 keV levels, respectively. The reduced E2 and M1 transition probabilities were obtained for 11 transitions. The results were compared with the available theoretical calculations.

Coulomb excitation of 133Cs with protons

1985 ◽  
Vol 63 (4) ◽  
pp. 483-487 ◽  
Author(s):  
K. P. Singh ◽  
D. C. Tayal ◽  
B. K. Arora ◽  
T. S. Cheema ◽  
H. S. Hans
Keyword(s):  
Angular Distribution ◽  
Gamma Ray ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Spin Assignment ◽  
Thick Target ◽  
Angular Distributions ◽  
Distribution Data ◽  
Mixing Ratios ◽  
Reduced Transition Probabilities

Protons of energy 3.2–4.2 MeV have been used to Coulomb excite the states in 133Cs. The thick-target gamma-ray yields and the angular distributions were measured using a 50 cm3 Ge(Li) detector. The measurements were used to extract the reduced transition probabilities, B (E2) and B(M1), and multipole mixing ratios (δ) for the various transitions. A spin assignment has been made to the 871.8 keV level on the basis of angular distribution data. The results obtained have been compared with those of other authors.

Gamma-Ray Angular Distribution in Coulomb Excitation

1956 ◽  
Vol 101 (5) ◽  
pp. 1504-1507 ◽  
Author(s):  
G. Breit ◽  
M. E. Ebel ◽  
J. E. Russell
Keyword(s):  
Angular Distribution ◽  
Gamma Ray ◽  
Coulomb Excitation

Coulomb excitation of low-energy levels in 45Sc

1979 ◽  
Vol 57 (8) ◽  
pp. 1196-1203 ◽  
Author(s):  
V. U. Patil ◽  
R. G. Kulkarni
Keyword(s):  
Gamma Ray ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Energy Levels ◽  
Negative Parity ◽  
Core Excitation ◽  
Mixing Ratios ◽  
Reduced Transition Probabilities ◽  
Excitation Model ◽  
First Time

Low-lying negative parity levels in 45Sc were Coulomb excited with 2.5 to 3.5 MeV protons and 4 to 5 MeV 4He ions to test the weak coupling core-excitation model. A Ge(Li) detector was used to measure the gamma-ray yields. The 543, 976, 1408, and 1662 keV levels in 45Sc were Coulomb excited for the first time. Gamma-ray angular distributions were measured at 3.0 MeV proton energy in deducing multipole mixing ratios and spin values. Energy level measurements (in units of kiloelectronvolts) and spin values obtained are as follows: 976, 5/2, 7/2 and 1408, 7/2. The E2 and M1 reduced transition probabilities were determined for the six states. The 376, 720, 1237, 1408, and 1662 keV levels have properties consistent with the interpretation of coupling a 1f7/2 proton to the first 2+ core state.

Proton?Capture Gamma Rays from Nitrogen?13

1962 ◽  
Vol 15 (3) ◽  
pp. 443 ◽  
Author(s):  
AW Parker ◽  
GG Shute
Keyword(s):  
Angular Distribution ◽  
Excited State ◽  
Elastic Scattering ◽  
Gamma Rays ◽  
Ground State ◽  
Recent Experiment ◽  
Gamma Ray ◽  
Angular Distributions ◽  
Proton Capture ◽  
Yield Curves

From a recent experiment in this laboratory (Shute et al. 1962) on the elastic scattering of protons from 12C, resonance levels (E13N, J1t) of 13N were obtained at the laboratory bombarding energies (Ep) shown in Table 1. To confirm these results, an investigation of the yield and angular distribution of gamma rays from the reaction 12C(p'YO)13N and 12C(p'Yl)13N was undertaken. Accordingly, the theoretical angular distributions, W(8), for the gamma ray (Yo) to the ground state of 13Na-) and also for the gamma ray (Yl) to the 1st excited state of 13Na+) were evaluated on the assumptions that overlap of levels in 13N is small and lowest order multipoles are involved. As angular distributions are parity insensitive, these were found to be identical for the two gamma rays expected. The simpler of these angular distributions are also shown on the table. The expected angular distributions indicate that 90� is a suitable angle for yield curves.

THE NEUTRON YIELD FROM HEAVY ICE TARGETS BOMBARDED WITH PROTONS BELOW THE D(p, n)2p THRESHOLD

1959 ◽  
Vol 37 (7) ◽  
pp. 866-873
Author(s):  
P. P. Singh ◽  
G. M. Griffiths ◽  
Y. I. Ssu ◽  
J. B. Warren
Keyword(s):  
Angular Distribution ◽  
Excitation Function ◽  
Neutron Yield ◽  
Gamma Ray ◽  
Theoretical Calculations ◽  
Secondary Reaction

In connection with some experiments on the gamma-ray yield from the D(p, γ)He3 reaction using heavy ice targets a considerable yield of neutrons was found even for proton bombarding energies well below the D(p, n)2p threshold of 3.3 Mev. The yield, excitation function, and angular distribution of this neutron yield have been investigated both experimentally and by means of theoretical calculations. These studies confirm the suggestion that the neutrons are produced by a secondary reaction in which deuterons, scattered in the target by incident protons, collide with further target deuterons to produce D(d, n)He3 reactions.

scholarly journals Analysis of Angular Distributions of Heavy-ion Inelastic Collisions

1982 ◽  
Vol 35 (1) ◽  
pp. 1
Author(s):  
CBO Mohr
Keyword(s):  
Angular Distribution ◽  
Coulomb Interaction ◽  
Heavy Ions ◽  
Coulomb Excitation ◽  
Heavy Ion ◽  
Inelastic Collisions ◽  
Effective Range ◽  
Transfer Reactions ◽  
Angular Distributions ◽  
Nuclear Excitation

The relative contributions of nuclear and Coulomb excitation to inelastic collisions of heavy ions are examined, and it is shown how to distinguish their effects on the angular distribution. From the experimental distributions for Coulomb excitation it is possible to make an estimate of the effective range of the Coulomb interaction in the collision. The distributions for nuclear excitation are analysed in the same way as in our previous work on transfer reactions, and give very similar results for the greater nuclear penetration in such collisions as compared with elastic collisions.

Band structures in 95Tc

1978 ◽  
Vol 56 (1) ◽  
pp. 117-126 ◽  
Author(s):  
K. A. Marshall ◽  
J. V. Thompson ◽  
W. B. Cook ◽  
M. W. Johns
Keyword(s):  
Angular Distribution ◽  
Internal Conversion ◽  
Gamma Ray ◽  
Distribution Functions ◽  
Angular Distributions ◽  
High Momentum ◽  
Internal Conversion Coefficients ◽  
Conversion Coefficients ◽  
Proton Induced Reaction ◽  
Induced Reaction

The (α,2nγ) reaction has been used to study high momentum states in 95Tc. Gamma ray singles excitation functions, angular distribution functions, γ–γ coincidence probabilities, and internal conversion coefficients were determined for a large number of transitions. In addition to a number of low spin levels that are strongly populated in proton induced reaction, the alpha induced reaction populates a positive parity sequence levels at 882 (13/2), 857 (11/2), 1516 (17/2), 1550 (15/2), 2184 (19/2), 2548 (21/2), 2908 (23/2), 3517 (25/2), 3919 (29/2), and 4293 (27/2) keV together with a negative sequence of levels at 39 (1/2), 668 (5/2), 1214 (9/2), 1702 (13/2), 2213 (17/2), 3024 (21/2), 3822 (25/2), 4128 (27/2, 29/2), and 4972 (29/2). The spins are assigned on the basis of internal conversion measurements and angular distributions.

A study of the levels in 19 F following the -decay of 19 O

1959 ◽  
Vol 252 (1268) ◽  
pp. 1-15 ◽  
Keyword(s):  
Angular Correlation ◽  
Excited States ◽  
Decay Scheme ◽  
Transition Probabilities ◽  
Theoretical Calculations ◽  
Collective Model ◽  
Particle Model ◽  
Β Decay ◽  
Intermediate Coupling ◽  
The Individual

The β-decay scheme of 19 O to states of 19 F has been determined, and log ft values assigned to the individual transitions, by studying the y-rays following β-decay. The decay schemes of the levels in 19 F have been elucidated by coincidence and angular correlation measurements. These measurements have enabled characteristics to be assigned to the excited states of 19 F, and relative y-transition probabilities have been determined. The results are compared with theoretical calculations on the individual-particle model in intermediate coupling and on the collective model.

Study of negative parity levels in 63Cu

1980 ◽  
Vol 58 (4) ◽  
pp. 472-480 ◽  
Author(s):  
R.G. Kulkarni ◽  
D. P. Navalkele
Keyword(s):  
Gamma Ray ◽  
Transition Probabilities ◽  
Negative Parity ◽  
Angular Distributions ◽  
Core Excitation ◽  
Model Calculations ◽  
Mixing Ratios ◽  
Reduced Transition Probabilities ◽  
Excitation Model ◽  
First Time

Low-lying negative parity levels in 63Cu were Coulomb excited with 3.25 to 4.25 MeV protons to test the weak coupling core-excitation model. A Ge(Li) detector was used to measure the gamma-ray yields. The 1412, 1547, and 1861 keV levels in 63Cu were Coulomb excited for the first time. Gamma-ray angular distributions were measured at 4.25 MeV proton energy in deducing multipole mixing ratios and spin values. The E2 and M1 reduced transition probabilities were determined for the six states. The 669.6, 962, 1327, and 1547 keV levels have properties consistent with the interpretation of coupling a 2p3/2 proton to the first 2+core state. The present results were compared with the available particle–core and particle–phonon model calculations.

Properties of Excited States ofP31. II. Gamma-Ray Angular Distributions and Correlations

1963 ◽  
Vol 131 (2) ◽  
pp. 787-804 ◽  
Author(s):  
Gale I. Harris ◽  
L. W. Seagondollar
Keyword(s):  
Excited States ◽  
Gamma Ray ◽  
Angular Distributions
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