Γ-ray Linear Polarization Measurements Research Articles

The valence mirror nuclei 114Sn and 146Gd

Excited states of 114Sn have been investigated via the 112Cd(α, 2n) non yrast compound nucleus reaction at a projectile energy of 28 MeV. The experiments consisted of γγ-coincidence, γ-ray angular distribution and γ-ray linear polarization measurements. The comparison of the excitation energies of the non collective yrast and yrare states in 114Sn and 146Gd shows remarkable similarities and corroborates the concept of valence mirror nuclei.

γ-Ray linear polarization measurements on oriented nuclei

The present status of γ-ray linear polarization measurements on oriented nuclei is discussed. The formalism used in the analysis of experimental data is summarized and complemented by formulae for γ-transitions with triple multipole mixing. A survey of the present technique of detection of γ-ray linear polarization, using Compton polarimeters, is given. Two important applications of γ-ray linear polarization measurements are briefly surveyed, namely, the measurement of theg-factors excited states and the investigation of time-reversal symmetry in atomic nuclei.

A Kπ = 4 − rotational band in 48V

Abstract From γ-ray linear polarization measurements, γ-ray angular distributions and γ−γ coincidences, the following levels were identified in 48V (EXin keV): 4− at 1099, (5−) at 1685, (6−) at 2397, (7−) at 3171 and (8−) at 3976. This sequence of states is interpreted as a Kπ = 4− rotational band.

A Kπ = 4 − rotational band in 48V

From γ-ray linear polarization measurements, γ-ray angular distributions and γ−γ coincidences, the following levels were identified in 48V ( E Xin keV): 4 − at 1099, (5 −) at 1685, (6 −) at 2397, (7 −) at 3171 and (8 −) at 3976. This sequence of states is interpreted as a K π = 4 − rotational band.

γ-ray linear polarization measurements following heavy-ion bombardment of2s−1dshell nuclei

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The collective excitation of 103Pd following (heavy ion, xn) reactions

Abstract The energy level structure of 103 Pd was studied using the reactions 100 Ru(α, nγ) 103 Pd and 94 Zr( 12 C, 3nγ) 103 Pd. The experiments included the measurement of γ-ray yield as a function of incident projectile energy, γ-γ coincidence measurements, γ-ray angular distributions, and γ-ray linear polarization measurements. Two ΔI = 2 bands built on the 7 2 + and 11 1 − intrinsic states were observed. The ( 12 C, 3n) reaction was found to be much more effective than the (α, n) reaction in exciting these bands. A decay scheme is presented showing energies up to 6049 keV and spins up to 35 2 . Additional information relating to the coupling between the odd particle and the core is presented. A cascade of six γ-rays in 103 Rh was observed following the reaction 94 Zr( 12 C, p2nγ) 103 Rh.

Determination of the parity of the 1663 keV state of 166Er by γ-ray linear polarization measurements

The multipolarity of the 1582 keV γ-transition in the decay of 166Ho has been determined from a γγ-linear polarization measurement to be almost pure E1. From this result, a negative parity can be unambigously assigned to the 1663 keV level in 166Er.