Nuclear g factors of three levels of 192Pt

1969 ◽  
Vol 47 (21) ◽  
pp. 2395-2399 ◽  
Author(s):  
D. B. Kenyon ◽  
L. Keszthelyi ◽  
J. A. Cameron
Keyword(s):  
Hyperfine Field ◽  
Angular Correlation ◽  
Iron Alloy ◽  
Scintillation Detectors ◽  
Angular Correlations ◽  
Mixing Ratios ◽  
G Factors

The g factors of the 316, 612, and 785 keV levels of 192Pt have been measured using gamma–gamma angular correlations perturbed by the hyperfine field in an iron alloy. Sources were 192Ir in 1 at.% Ir Fe alloy. Coincidences were observed using a combination of Ge(Li) and scintillation detectors. For the three levels, the g factors obtained were[Formula: see text]In addition, the E2/M1 mixing ratios were obtained from the angular correlation measurements.[Formula: see text]

The Magnetic Field at Tungsten Nuclei in Iron

1972 ◽  
Vol 50 (8) ◽  
pp. 736-739 ◽  
Author(s):  
J. A. Cameron ◽  
L. Keszthelyi ◽  
G. Mezei ◽  
Z. Szökefalvi-Nagy ◽  
L. Varga
Keyword(s):  
Magnetic Field ◽  
External Field ◽  
Hyperfine Field ◽  
Iron Alloy ◽  
Larmor Precession ◽  
Hyperfine Anomaly ◽  
The Magnetic Field ◽  
Mev Protons ◽  
G Factors

Larmor precession of the first 2+ states of 182W and 184W has been observed in an iron alloy containing 5 atom % W. The levels were Coulomb excited with 2.5 MeV protons. The hyperfine energy in 182W is the same as that found by Mössbauer absorption. The variation of the field up to 300 °K is less than 6%. A comparison of g factors measured by the hyperfine field and the external field suggests the existence of a hyperfine anomaly.

AN ILLUSTRATION OF A TYPE OF TRIPLE CORRELATION MEASUREMENT WHICH CAN BE EASILY INTERPRETED

1960 ◽  
Vol 38 (7) ◽  
pp. 927-940 ◽  
Author(s):  
A. E. Litherland ◽  
G. J. McCallum
Keyword(s):  
Angular Correlation ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Residual Nucleus ◽  
Incident Beam ◽  
Electric Quadrupole ◽  
Final States ◽  
Angular Correlations ◽  
Mixing Ratios ◽  
Triple Correlation

The Mg26(He4, nγ)Si29 reaction has been used to illustrate the simplifications introduced in the interpretation of triple angular correlations by choosing a target and bombarding particles of zero spin and by observing the emitted particles, in this case neutrons, in a counter fixed at 0° to the beam. The angular correlations of the gamma rays with respect to the incident beam then depend only upon the properties of the final states in the residual nucleus. The angular correlation of the electric quadrupole 2.03-Mev gamma ray is predicted uniquely by theory and this prediction has been verified experimentally. The angular correlations of the 1.28-Mev and 2.43-Mev gamma rays have yielded for the E2/M1 amplitude mixing ratios +0.25 ± 0.05 or −3.4 ± 0.5 and −0.26 ± 0.08 or −1.10 ± 0.16 respectively. In addition, the experiment provides an illustration of the value of the recently discovered technique of neutron – gamma-ray discrimination in an organic scintillator.

scholarly journals Angular Correlation Measurements in 33S

1977 ◽  
Vol 30 (1) ◽  
pp. 23 ◽  
Author(s):  
JR Southon ◽  
AR Poletti ◽  
DJ Beale
Keyword(s):  
Excitation Energy ◽  
Angular Correlation ◽  
High Energy ◽  
Branching Ratios ◽  
Angular Correlations ◽  
Mixing Ratios ◽  
Weak Decays ◽  
Energy States

The 32S(d, p) reaction has been used to excite states in 33S. Proton-gamma angular correlations for states up to 4�43 MeV in excitation energy have been measured to determine spins and y-ray branching and multipole mixing ratios. Results obtained for mixing ratios include 0(1� 97-+0) = 0'75�0'38, 0(2'93-+0) = 0�19�0�14 and 0(2'93-+1'97) = O�OO�O�04. Spin and parity assignments of 3/2 + and (1/2+, 3/2�) have been found for the 3� 94 and 4�43 MeV states respectively. Branching ratios have been determined for several previously unreported weak decays from high energy states.

Spins of Levels in 32P by Angular-Correlation Studies

1971 ◽  
Vol 49 (23) ◽  
pp. 2931-2937 ◽  
Author(s):  
C. St-Pierre ◽  
R. Gagnon ◽  
G. S. Gill
Keyword(s):  
Angular Correlation ◽  
Decay Scheme ◽  
Correlation Method ◽  
Spectroscopic Properties ◽  
Angular Correlations ◽  
Correlation Studies ◽  
Other Information

The spectroscopic properties of the 1.75, 2.66, 2.74, and 3.00 MeV levels of 32P have been studied by the particle–gamma angular-correlation method II of Litherland and Ferguson applied to the reaction 29Si(α,p)32P at 10.3 MeV. The decay scheme was observed with a Ge–Li detector in coincidence with the protons. The spin of the 1.75 MeV level was determined to be 3. The restrictions imposed on J by the analysis of the angular correlations combined with other information lead to the following most probable assignments: 2.66 MeV, J = 1,2; 2.74 MeV, J = 1,2; 3.00 MeV, J = 1,2,3.

scholarly journals Study of Angular Correlations in Monte Carlo Simulations in Pb-Pb Collisions

Universe ◽  
2019 ◽  
Vol 5 (5) ◽  
pp. 97
Author(s):  
Balázs Endre Szigeti ◽  
Monika Varga-Kofarago
Keyword(s):  
Monte Carlo ◽  
Transverse Momentum ◽  
Monte Carlo Simulations ◽  
Angular Correlation ◽  
Charged Hadron ◽  
Experimental Results ◽  
Transport Models ◽  
Side Peak ◽  
Angular Correlations ◽  
Hadron Pairs

In two-particle angular correlation measurements, the distribution of charged hadron pairs are evaluated as a function of pseudorapidity ( Δ η ) and azimuthal ( Δ φ ) differences. In these correlations, jets manifest themselves as a near-side peak around Δ η = 0 , Δ φ = 0 . These correlations can be used to extract transverse momentum ( p T ) and centrality dependence of the shape of the near-side peak in Pb-Pb collision. The shape of the near-side peak is quantified by the variances of the distribution. The variances are evaluated from a fit combining the peak and the background. In this contribution, identified and unidentified angular correlations are shown from Pb-Pb collisions at s N N = 2.76 TeV from Monte Carlo simulations (AMPT, PYTHIA 8.235/Angantyr). Results show that transport models in AMPT give better results than PYTHIA 8.235/Angantyr when comparing to the experimental results of the ALICE collaboration.

Nuclear g Factors in 55Fe

1973 ◽  
Vol 51 (7) ◽  
pp. 707-712 ◽  
Author(s):  
P. G. Kerr ◽  
A. W. Gibb ◽  
J. A. Cameron
Keyword(s):  
Excited States ◽  
Gamma Rays ◽  
Target Material ◽  
Internal Field ◽  
Angular Distributions ◽  
Mixing Ratios ◽  
Decay Gamma ◽  
G Factors

The (α,n) reaction on natural chromium has been used to study levels in 55Fe up to 2.5 MeV excitation. Intensities and angular distributions of the decay gamma rays were measured, yielding branching and E2/M1 mixing ratios. In a magnetized target of the alloy Cr20Fe80, the rotation of the angular distributions was observed. Using recently determined lifetimes for the excited states and the average internal field of 277 kOe measured in the target material by Mössbauer absorption, the following g factors are obtained:[Formula: see text]

On the magnetic hyperfine field at Hf in iron and the gyromagnetic factors g K and g R of the 624 rotational band of 177 Hf

1969 ◽  
Vol 311 (1504) ◽  
pp. 181-184 ◽  
Keyword(s):  
Hyperfine Field ◽  
Rotational Band ◽  
Ground State ◽  
Magnetic Hyperfine Field ◽  
Excited Level ◽  
Internal Field ◽  
Magnetic Hyperfine ◽  
Iron Foil ◽  
Mixing Ratios ◽  
A Value

The induced magnetic hyperfine field acting on 177 Hf nuclei implanted into an iron foil by means of an isotope separator was determined by measuring the integral rotation of the 208-113 keV γ-γ directional correlation. By using the previously known values of the g factor and the lifetime of the 113 keV state of 177 Hf a value of - (286 ± 40) kOe was obtained for the effective internal field. The same source was used to measure the g factor of the 321 keV excited level in 177 Hf, which is the ground state of the K = 9/2 + [624] rotational band. The measurement of the integral rotation of the 105-208 keV cascade yielded the value of g (321) = -0.113 ± 0.038. The combination of the g factor and the M 1/ E 2 mixing ratios of the Δ I = 1 transitions in the [624] rotational band in 177 Hf, which were determined from directional correlation measurements employing Ge(Li) detectors, gave g K = -0.18 ± 0.05 and g R = 0.19 ± 0.05.

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