Average 2p subshells fluorescence yield values of some elements in the atomic number range 60≤Z≤90

2010 ◽  
Vol 177 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Mehmet Ertugrul ◽  
Elif Öz ◽  
Önder Şimşek ◽  
Yusuf Şahin
Keyword(s):  
Atomic Number ◽  
Fluorescence Yield ◽  
Number Range ◽  
Yield Values

Observing the Chemical State of Elements With Z=21 To 28 From L Alpha1 To L L Ratios With Energy Dispersive Spectroscopy (EDS)

1999 ◽  
Vol 5 (S2) ◽  
pp. 590-591
Author(s):  
A. Sandborg ◽  
R. Anderhalt
Keyword(s):  
High Resolution ◽  
Atomic Number ◽  
Energy Dispersive Spectroscopy ◽  
Emission Spectra ◽  
Outer Electron ◽  
Number Range ◽  
X Ray ◽  
Chemical Effects ◽  
Intensity Changes ◽  
Electron Shells

It is well known that chemical bonding affects elemental x-ray emission spectra. The spectra of low atomic number elements show energy shifts which depend on the bonding of the element. To observe these shifts, a high resolution wavelength dispersive (WDS) x-ray spectrometer is required. Intensity variations of the L series can be observed with an EDS system which also show chemical effects.The L Alphal and the L L radiations are produced from a vacancy in the L III shell. Normally the L L line is about 5 to 6% of the intensity of the L Alphal line. However, in the atomic number range of Z=21 to 28, it is easily observed that the L L line becomes more intense. The L Alphal is no longer present at Z=20. These intensity changes are due to the outer electron shells of these atoms being unfilled. The L Alphal comes from the L3-M5 transition, while the L L comes from L3-M1 transition. The M5 (3d level) of the M shell is partially filled for Z=21 to 28; empty for Z<21and full for Z> 28. Holliday observed a Ti LL which was 17% greater than the Ti L Alphal.

Investigations on the study of entrance channel effects in synthesis of superheavy elements using Cr-induced fusion reactions

2020 ◽  
Vol 29 (08) ◽  
pp. 2050061
Author(s):  
H. C. Manjunatha ◽  
N. Manjunatha ◽  
L. Seenappa
Keyword(s):  
Atomic Number ◽  
Asymmetry Parameter ◽  
Superheavy Elements ◽  
Entrance Channel ◽  
Heavy Nuclei ◽  
Fusion Reactions ◽  
Number Range ◽  
Mass Asymmetry ◽  
Number Formula ◽  
Super Heavy Nuclei

We have investigated the synthesis of superheavy elements using Cr-induced fusion reactions. We have studied all possible Cr-induced fusion reactions for the synthesis of super heavy nuclei [Formula: see text]. We have achieved the semi-empirical formula for fusion barrier heights ([Formula: see text]), positions ([Formula: see text]), curvature of the inverted parabola ([Formula: see text]) of Cr-induced fusion reactions for the synthesis of superheavy nuclei with atomic number range [Formula: see text]. The proposed formula produces fusion barriers of Cr-induced fusion reactions for the synthesis of super heavy nuclei with the simple inputs of mass number ([Formula: see text]) and atomic number ([Formula: see text]) of projectile-targets. We have also identified the targets for Cr-induced fusion reactions to synthesis superheavy elements of [Formula: see text]. We have also studied the entrance channel parameters such as mass asymmetry ([Formula: see text]), charge asymmetry ([Formula: see text]), coulomb interaction parameter ([Formula: see text]’), Businaro–Gallone mass asymmetry parameter ([Formula: see text]) and Isospin asymmetry parameter [[Formula: see text]]. We hope that our predictions may be the guide for the future experiments in the synthesis of more superheavy elements using [Formula: see text]Cr-induced fusion reactions.

K-Shell X-Ray Fluorescence Studies of Some Elements in the Atomic Number Range 26 = Z = 70

2013 ◽  
Vol 3 (2) ◽  
pp. 27-44
Author(s):  
Punchithaya K Sripathi ◽  
K M Balakrishna
Keyword(s):  
Background Radiation ◽  
Number Range ◽  
X Ray ◽  
Fluorescence Studies ◽  
Scattering Effects ◽  
Yield Values ◽  
Reflection Geometry ◽  
Set Up ◽  
Channel Analyzer ◽  
Multiple Scattering Effects

K-shell fluorescence yields of low, medium Z and rare earth elements were determined using Si(PIN) detector and HPGe detector employing reflection geometry set up. Target atoms were excited using 59.5 keV gamma rays emerging from Am-241 source of strength 300 mCi. Background radiation and multiple scattering effects were minimized by properly shielding the detector. The elemental foils of uniform thickness and 99.9% purity were used in the present investigation. The fluorescent spectra were recorded in an 8K and 16K multi channel analyzer. The data were carefully analyzed and total K-shell fluorescence yields were calculated. The resulting yield values are compared with the available experimental and theoretical values.

Measurement of the Kα to Lα and Kβ to Lβ intensity ratios of seven elements in the atomic number range 52≤Z≤62 using photoionization at 59.5 keV1

2004 ◽  
Vol 97 (2) ◽  
pp. 172-175 ◽  
Author(s):  
A. Küçükönder ◽  
Ö. Söğüt ◽  
E. Küçükönder ◽  
E. Büyükkasap
Keyword(s):  
Atomic Number ◽  
Number Range ◽  
Intensity Ratios

Measurement of L shell fluorescence yields of seven elements in the atomic number range 79Z92 using photoionization

1999 ◽  
Vol 28 (2) ◽  
pp. 91-93 ◽  
Author(s):  
Önder Şimşek ◽  
O??uz Do??an ◽  
Ümit Turgut ◽  
Mehmet Ertu??rul ◽  
Hasan Erdo??an
Keyword(s):  
Atomic Number ◽  
Number Range

A study of alpha-decay using effective liquid drop model

2021 ◽  
Author(s):  
G. R. Sridhara ◽  
H. C. Manjunatha ◽  
N. Sowmya ◽  
P. S. Damodara Gupta
Keyword(s):  
Atomic Number ◽  
Liquid Drop ◽  
Alpha Decay ◽  
Nucl Phys ◽  
Spin Effect ◽  
Liquid Drop Model ◽  
Number Range ◽  
Formation Probability ◽  
Semi Empirical

In this paper, we have made an attempt to analyze the alpha-decay half-lives of in the atomic number range [Formula: see text] by considering an effective liquid drop model. The role of pre-formation probability by including iso-spin effect is included during an evaluation of half-lives. We have also compared the studied alpha-decay half-lives with that of semi-empirical formulae such as Viola Seaborg semi-empirical formulae (VSS) [J. Inorg. Nucl. Chem. 28 (1966) 741; Nucl. Phys. A 848 (2010) 279], Royer formulae [J. Phys. G: Nucl. Part. Phys. 26 (2000) 1149; Phys. Rev. C 101 (2020) 034307] and also with that of the available experiments. From this comparison, it can be concluded that the effective liquid drop model produces an alpha-decay half-lives close to the experiments.

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