Determination of Gamma Angular Distribution from the Shape of Spectral Line for the First Excited State of Carbon Nucleus

The present work demonstrates the feasibility of alining manganese-56 produced by neutron irradiation of a nickel fluosilicate crystal containing stable 55 Mn. Measurements were made of the angular distribution of the γ-radiation from the alined 56 Mn and also of the angular correlation of the γ-rays from this isotope. By combining the results it is possible to establish uniquely as 2 the spins of the states of the daughter nucleus of 56 Fe at 2.66 and 2.98 MeV. The mixing ratios δ ( E 2/ M 1) for the 1.81 and 2.13 MeV γ-rays to the first excited state are shown to be 0.19 ± 0.02 and — 0.28 ± 0.02. The spectrum of the γ-radiation was studied with a scintillation spectrometer and this leads to the following relative intensities; 0.845 MeV (100%), 1.81 MeV (27 ± 3%), 2.13 MeV (15 ± 3%), 2.55 MeV (1.2 ± 0.2%), 2.66 MeV (0.65 ± 0.1%), 2.98 MeV (0.35 ± 0.1%) and 3.4 MeV (0.22 ± 0.05%). Coincidence measurements suggest that the 2.55 and 3.4 MeV γ-rays are due to de-excitation of a level at about 3.4 MeV which decays both to the ground and first excited states. A spin of 2 for this state is proposed.

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Copper and sulphur depth profile in patina layers using NRA and RBS

HNPS Proceedings ◽

10.12681/hnps.2236 ◽

2019 ◽

Vol 11 ◽

Author(s):

G. Kalliabakos ◽

S. Kossionides ◽

P. Misailides ◽

C. T. Papadopoulos ◽

R. Vlastou

Keyword(s):

Excited State ◽

Cross Sections ◽

Ground State ◽

Depth Distribution ◽

Nuclear Reaction Analysis ◽

Beam Direction ◽

The Third ◽

First Excited State ◽

Γ Ray

A combination of nuclear reaction analysis (NRA) and Rutherford backscattering spectroscopy (RBS) were utilized in order to obtain information on the depth distribution of sulphur and copper in artificially produced and natural patina layers. The copper profiling was performed by using the reaction 63Cu(p,p'y)6 3Cu and detecting the 1327 keV γ-ray deexciting the third excited state to the ground state of 6 3Cu produced. For the determination of sulfur the 2230 keV γ-ray was used, deexciting the first excited state to the ground state of 32S formed through the reaction 3 2S(p,p'y)3 2S, which exhibits three sharp resonances at projectile energies 3.094, 3.195 and 3.379 MeV. The relevant cross-sections were measured in the energy range between 3.0 and 3.7 MeV in steps of 20 keV at 125° to the incident proton beam direction. Supporting information on the depth distribution of oxygen and the other elements of the patina samples was obtained by p-RBS (Ep = 1.5 MeV; θ = 160°).

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Determination of Sulfur and Copper Profile with nuclear reactions

HNPS Proceedings ◽

10.12681/hnps.2168 ◽

2019 ◽

Vol 10 ◽

pp. 1

Author(s):

S. Kossionides ◽

G. Kaliambakos ◽

R. Vlastou ◽

C. T. Papadopoulos

Keyword(s):

Excited State ◽

Cross Section ◽

Ground State ◽

Nuclear Reactions ◽

Nuclear Reaction Analysis ◽

The Third ◽

First Excited State ◽

Γ Ray ◽

Resonant Reaction

The concentration and depth profile of Cu and S in patinna samples have been determined by using Nuclear Reaction Analysis (NRA) and Rutherford Backscattering Spectroscopy (RBS). For the NRA the differential cross section was mesaured for the 1327 keV 7-ray deexciting the third excited state to the ground state of 6 3Cu through the reaction 63Cu(p,p'7), as well as, for the 2230 keV γ-ray deexciting the first excited state to the ground state through the resonant reaction 32S(p,p'7). The mesaurements of both excitation functions were performed in the energy range 3.0 - 3.7 MeV in 20 keV steps and at an angle of 125°.

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Inelastic Scattering of Protons on 12C

Australian Journal of Physics ◽

10.1071/ph610432 ◽

1961 ◽

Vol 14 (3) ◽

pp. 432 ◽

Cited By ~ 6

Author(s):

VR McKenna ◽

GG Shute

Keyword(s):

Excited State ◽

Elastic Scattering ◽

Inelastic Scattering ◽

Lower Energy ◽

Short Communication ◽

Carbon Nucleus ◽

Residual Carbon ◽

First Excited State ◽

Variable Energy Cyclotron ◽

Variable Energy

During the recent Variable Energy Cyclotron experiment involving the elastic scattering of protons on 12C, the complete energy spectrum of the scattered protons was obtained by means of a 100-channel analyser (McKenna, Baxter, and Shute 1961, henceforth referred to as I). Two prominent peaks were obtained: the higher energy one corresponding to elastic scattering and the lower energy one to inelastic scattering with the residual carbon nucleus being left in its first excited state, 4� 43 MeV. In I the elastic scattering results were reported briefly. The purpose of this short communication is to discuss the main features of the inelastic scattering.

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THE SPIN OF THE 3.70-MEV LEVEL IN Al25

Canadian Journal of Physics ◽

10.1139/p63-098 ◽

1963 ◽

Vol 41 (6) ◽

pp. 923-931 ◽

Cited By ~ 2

Author(s):

G. J. McCallum

Keyword(s):

Angular Distribution ◽

Excited State ◽

Band Structure ◽

Ground State ◽

Transition Probability ◽

Spin Assignment ◽

Mixing Ratio ◽

Excitation Radiation ◽

Rotational Bands ◽

First Excited State

The 3.70-Mev level in Al25 has been studied by means of the reaction Mg24(p, γ)Al25 at the 1.49-Mev resonance. Direct angular distribution measurements of the de-excitation gamma radiation support the spin assignment of 7/2− for this level. An E2/M1 amplitude mixing ratio of −0.55 ± 0.2 is found for the 1.79-Mev de-excitation radiation from the fourth excited state to the ground state of Al25. The ratio of the reduced transition probability of the E2 radiation from the 1.79-Mev level to the first excited state is shown to be ~30 times that to the ground state. This result provides further confirmation of rotational band structure in Al25 since the collective model predicts such an enhancement of E2 transitions between rotational bands whereas cross-band transitions are not expected to be enhanced.

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Internal-conversion coefficient determination of odd parity for the 108.8-keV first-excited state ofRb91

Physical Review C ◽

10.1103/physrevc.11.1455 ◽

1975 ◽

Vol 11 (4) ◽

pp. 1455-1458 ◽

Cited By ~ 5

Author(s):

F. K. Wohn ◽

W. L. Talbert ◽

R. S. Weinbeck ◽

M. D. Glascock ◽

J. K. Halbig

Keyword(s):

Excited State ◽

Internal Conversion ◽

Conversion Coefficient ◽

Internal Conversion Coefficient ◽

First Excited State

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THE ANGULAR DISTRIBUTION OF GAMMA RAYS IN THE C12(p,p′γ) REACTION

Canadian Journal of Physics ◽

10.1139/p53-019 ◽

1953 ◽

Vol 31 (2) ◽

pp. 189-193 ◽

Cited By ~ 3

Author(s):

H. E. Gove ◽

N. S. Wall

Keyword(s):

Angular Momentum ◽

Angular Distribution ◽

Excited State ◽

Proton Beam ◽

Gamma Rays ◽

Ground State ◽

Expansion Formula ◽

First Excited State ◽

Incoming Proton

Protons of 7.1 Mev. energy from the MIT cyclotron have been used to investigate the angular distribution of gamma rays from the C12(p,p′γ) reaction with respect to the incoming proton beam. These gamma rays result from transitions between the first excited state of C12 at 4.45 Mev. and the ground state. The resulting distribution can be fitted by the expansion[Formula: see text]which is consistent with an assignment of two for the angular momentum of the first excited state of C12.

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