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Angular Distribution of Bremsstrahlung Photons in Ta Target for 40 MeV Electron Beam

100%

Demir N., Kuluöztürk Z., Akkurt İ.

Acta Physica Polonica A

2015

vol. 128

issue 2B

B-443-B-444

Bremsstrahlung photons are created by electron beams de-accelerating in electric field (coupling with a thin radiator) and are used in a variety of different fields. In nuclear physics experiments it is important to transport and focus the created photon beam into the experimental cavity. Here angular distribution of the photon beam is one of the important parameters, which should be known. In this study a FLUKA simulation has been done to obtain angular distribution of photon beam created by interaction of 40 MeV electron beam with the tantalum (Ta) radiator of varied thickness, which is planned to be used in bremsstrahlung photon facility at TARLA (Turkish Accelerator and Radiation Laboratory in Ankara). TARLA will be the first facility of Turkish Accelerator Center project.

Time Differential Perturbed Angularγγ-Correlation Studies of Diethylenetriaminepentaacetic Acid Complexes with ^{111}In and ^{111m}Cd

80%

Shpinkova L., Carbonari A., Nikitin S., Mestnik-Filho J.

Acta Physica Polonica A

2001

vol. 100

issue 5

799-805

Static and dynamic electric quadrupole interactions of ^{111}Cd in complexes with diethylenetriaminepentaacetic acid were studied by the time differential perturbed angular γγ-correlation technique using two parent isotopes, ^{111}In(EC)^{111}Cd and ^{111 m}Cd. The measurements were carried out using neutral aqueous solutions of the diethylenetriaminepentaacetic- acid-complexes with initial isotopes at 293 K and 77 K. It was shown that the ^{111}Cd-diethylenetriaminepentaacetic-acid-complex in aqueous solutions at pH = 7.0 is characterised by the re-orientational correlation time of 7.7×10^{-11} s and an electric field gradient V_{zz}=6.7(2)×10^{21} V/m^2 with an asymmetry parameter η=0.75(5). A direct comparison of the electric quadrupole interaction parameters for diethylenetriaminepentaacetic- acid-complexes with ^{111}In and ^{111m}Cd confirmed the proposal about the fragmentation of the complexes caused by the after-effects of electron capture in ^{111}In. An observed difference in the electric quadrupole interaction parameters obtained for the solutions with ^{111}In and ^{111m}Cd complexes reflects a process of a chemical rearrangement of the complex structure after the In decay into Cd

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2 Acta Physica Polonica A

1 2015

1 2001

1 Akkurt İ.

1 Carbonari A.

1 Demir N.

1 Kuluöztürk Z.

1 Mestnik-Filho J.

1 Nikitin S.

1 Shpinkova L.

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Angular Distribution of Bremsstrahlung Photons in Ta Target for 40 MeV Electron Beam

Time Differential Perturbed Angularγγ-Correlation Studies of Diethylenetriaminepentaacetic Acid Complexes with ^{111}In and ^{111m}Cd