New gamma-ray branching ratios in16N and their implications on the muon partial capture rates in16O

L. Falffy; J. Lehmann; L. Grenacs; M. Subotowicz

doi:10.1007/bf02823322

Branching Ratios and Lifetimes of 25Mg Levels below 5.2 MeV

Canadian Journal of Physics ◽

10.1139/p74-304 ◽

1974 ◽

Vol 52 (23) ◽

pp. 2329-2342 ◽

Cited By ~ 14

Author(s):

R. W. Ollerhead ◽

D. C. Kean ◽

R. M. Gorman ◽

M. B. Thomson

Keyword(s):

Doppler Shift ◽

Gamma Ray ◽

Branching Ratios ◽

Surface Barrier ◽

Surface Barrier Detector ◽

Rotational Model ◽

Rotational Bands ◽

Barrier Detector ◽

Combined Data

All levels below 5.2 MeV in 25Mg have been studied using the reaction 25Mg(p, p′γ). In-elastically scattered protons were detected in an annular surface barrier detector located at 180°; coincidence gamma-ray spectra were obtained at Ge (Li) detector angles of 90°, 45°, and 135°. Level energies were determined from unshifted gamma-ray energies recorded in the 90° spectra. Lifetimes were obtained from the attenuated Doppler shift of gamma-ray energies recorded in spectra taken at forward and backward angles. Branching ratios were deduced from the combined data of all three angles. The identification of levels as members of rotational bands is discussed, and transition strengths deduced from the present measurements are compared with predictions of the simple rotational model.

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Branching Ratios and Lifetimes of 25Mg Levels between 5.2 and 6.1 MeV

Canadian Journal of Physics ◽

10.1139/p75-018 ◽

1975 ◽

Vol 53 (2) ◽

pp. 123-132 ◽

Cited By ~ 9

Author(s):

R. W. Ollerhead ◽

D. C. Kean ◽

S. G. T. Leong ◽

C. Doekes ◽

T. M. R. Meadley

Keyword(s):

Gamma Ray ◽

Branching Ratios ◽

Surface Barrier ◽

Surface Barrier Detector ◽

Ground State Band ◽

Rotational Model ◽

Rotational Bands ◽

Barrier Detector ◽

State Band ◽

Combined Data

All levels between 5.2 and 6.1 MeV in 25Mg have been studied using the reaction 25Mg(p,p′γ). Inelastically scattered protons were detected in an annular surface barrier detector located at 180°; coincidence gamma-ray spectra were obtained at Ge(Li) detector angles of 90, 45, and 135°. Level energies were determined from unshifted gamma-ray energies recorded in the 90° spectra. Lifetimes were obtained from the attenuated Doppler shift of gamma-ray energies recorded in spectra taken at forward and backward angles. Branching ratios were deduced from the combined data of all three angles. The identification of levels as members of rotational bands is discussed, and transition strengths deduced from the present measurements are compared with predictions of the simple rotational model. In particular, evidence is presented for the identification of a level at 5535 keV as the 11/2 member of the ground state band, levels at 5522 and 5794 keV as the 5/2 and 11/2 members of the Kπ = 1/2− band, and a level at 6040 keV as the 11/2 member of a Kπ = 9/2+ band.

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μ−partial capture rates inO16

Physical Review C ◽

10.1103/physrevc.19.987 ◽

1979 ◽

Vol 19 (3) ◽

pp. 987-997 ◽

Cited By ~ 29

Author(s):

P. Guichon ◽

B. Bihoreau ◽

M. Giffon ◽

A. Goncalves ◽

J. Julien ◽

...

Keyword(s):

Partial Capture Rates ◽

Capture Rates

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A survey of gamma ray branching ratios

Nuclear Physics ◽

10.1016/0029-5582(61)91081-1 ◽

1961 ◽

Vol 28 (1) ◽

pp. 598-601 ◽

Cited By ~ 4

Author(s):

William W. Pratt

Keyword(s):

Gamma Ray ◽

Branching Ratios

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Study of thermal neutron capture in potassium

Canadian Journal of Physics ◽

10.1139/p70-144 ◽

1970 ◽

Vol 48 (10) ◽

pp. 1109-1129 ◽

Cited By ~ 18

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.

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Lifetimes and branching ratios of energy levels of 28Si. I

Canadian Journal of Physics ◽

10.1139/p69-084 ◽

1969 ◽

Vol 47 (6) ◽

pp. 639-649 ◽

Cited By ~ 20

Author(s):

A. E. Litherland ◽

P. J. M. Smulders ◽

T. K. Alexander

Keyword(s):

Gamma Rays ◽

Gamma Ray ◽

Energy Levels ◽

Ground Level ◽

Particle Beam ◽

High Energy ◽

Branching Ratios ◽

Alpha Particles ◽

Doppler Shift Attenuation ◽

Energy Gamma

The gamma rays from the 25Mg(α,nγ)28Si reaction have been studied using alpha particles with energies ranging from 4.8 to 6.0 MeV. A 25 cm3 Ge(Li) gamma-ray counter was used to observe the complex high energy gamma-ray spectra at angles between 0° and 130° to the alpha-particle beam. Estimates of the nuclear lifetimes of the energy levels excited were obtained from Doppler shift attenuation measurements. The de-excitation branching ratios of the levels were also measured. The existence of a new level in 28Si at 6695 keV was confirmed. The recently reported 3− level at either 6880 keV or 6889 keV was observed and found to be the 6880-keV member of the doublet. The enhancement of the octupole transition to the ground level of 28Si was found to be 13 Weisskopf units.

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Study of the Decay of the 3.696 MeV Level in 25Al

Canadian Journal of Physics ◽

10.1139/p71-059 ◽

1971 ◽

Vol 49 (4) ◽

pp. 467-474 ◽

Cited By ~ 5

Author(s):

G. J. McCallum ◽

R. J. Sparks ◽

G. E. Coote ◽

K. P. Pohl

Keyword(s):

Doppler Shift ◽

Gamma Ray ◽

Branching Ratios ◽

Angular Distributions ◽

Doppler Shift Attenuation ◽

Doppler Shift Attenuation Method

The decay of the 3.696 MeV level in 25Al has been studied by means of the 24Mg(p,γ)25Al reaction at the 1.49 MeV resonance. Gamma-ray branching ratios, direct angular distributions, and lifetimes determined by the Doppler shift attenuation method are reported.

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